K20 Ported Head Gains

They will make more power than it's twin in aluminum. 3L head in the middle and the 6. Not what I'm looking for, honestly So, I'm looking for what gains I'd be getting by dropping some Ai 226cc ported and polished 243 heads on to my LS1. Thumper said over 230 on the intake side, So I would guess comparable to what other heads flow at that level on the exh. While I have everything apart I was planning on doing some porting to the head and intake. Just the thread I needed. Recommended Use : All Motor Street/Race; Road Race; Turbo and Supercharged ; Suitable for all out 2. December 8, 2012 Ted Eaton. Wiseco Honda Acura K20 K24 FLAT TOP 86MM bore Piston Shelf Stock Kit 9. We start with the CNC Core direct from Brodix. Green line: 3 angle valve job Blue line: 3 angle valve job plus 30° backcut on the valve Overall gain in flow @. 2L L86 engine! The TSP heads/cam package will include the following items: Precision Race Components CNC Porting L83 or L86/LT1 CUSTOMER-SUPPLIED Cylinder Heads. Check out the results here and in the September 2012 issue of Muscle Mustangs & Fast Fords Magazine. A small-block Chevy that made 404 hp on stock factory 492 heads delivered 482 hp on a set of fully ported Dart 200-cc-port aluminum heads. Only comes in 4500 series Dominator carb flange. However, a valve job has been known to help in that particular setup. I can imagine that the intake flow gains much horses, because suction on the intake is vacuum from zero upto minus 0,xx bar. Then you would port match the intake runner ports to the head to create a smoother incoming flow of air (eliminate turbulence) thereby increasing. 020 ti get the compression up to over 10:1 and custom grind EPS and you will be more than happy Jun 7, 2011 #9. you are better off buying thumper ported E-7's directly from him. 260cc CNC Porting Package Our Budget CNC porting for GM L92's alleviates the primary restrictions in the head. 1 Head Porting K20a-K20z-K24a Recommnded for up to-310whp All-Motor-93oct Pump Gas/340-350whp-E85/M5, & 400- 1000whp Turbo Applications-Professionally hand ported - Reshaped ports -Reshaped bowls -Blended bowls -Polished & unshrouded combustion chambers -KMOD Street Race 5 angle valvejob -Includes CNC. Also is a great head for big power turbo cars. This illustrates how even the mildest of engine builds will benefit from the addition of a decent valve job. Port Size: 1. Porting and polishing an engine's intake manifold is an essential step in optimizing its performance, particularly if it is modified. I had set of gt-40 heads too and i was going to send it to him. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. We are in the middle of porting the cylinder head to see the gains and figure out the cam configuration to do with this motor that will make power. Now, if you are trying to stay in a certain class for racing, and. This one is owned by a k20a. Porting Templates Die cut clear templates take the guesswork out of porting a set of heads. K20-K24 Valvecover- Gunmetal. Keep in mind aside from the HP gains you'll yield from a better set of heads, you'll also gain performance from having a lighter head. this is a great match for us since we use RBC (accord euro R) manifold stock and the way our heads are ported. 1 is ported by hand, stages 2 & 3 are CNC Ported. i have seen some posts on other ls based forums where guys are seeing about 20-40whp with ported 243 heads on stock cammed ls1's. Modern Muscle Performance Group 87mm Ported TB, big CAM, and ported eagle heads. Includes full "Port & Polished" Head, high performance valve job, & head resurface. 450-inch lift and 7 cfm at. To gain flow above that point, the entire port will need to be reworked (which will in turn help the low and mid-lift flow. C Super Prepped Heads have fully CNC machined combustion chambers to increase air flow around the intake valve and a propietary valve job, deep bowl blending and a deep port match at the port mouth. Lingenfelter #243 casting LS6, LS2 cylinder heads are precision CNC machined in house to insure that exact tolerances are maintained. From a heads cam LS build to a moderate power adder. Summary Customer Reviews (13) DOWNLOAD FLOW DATA PDF. 9 blower also ported by Greg Good. uprated valve springs and proper tune is a given. Here's a solid back-to-back on a set of unported 5. Reinstalling the head on the flow bench, Jerry set up an open port (entry only) test to sec what improvements had been made. 0 Sc engine on somewhat of a limited budget as per this thread and will be doing the head porting myself, initially to save money, but now more to try and test the below views on the topic from a home DIYer's point of view, and ultimately have the satisfaction of having ported my own heads. LS Heads: Cathedral-Port vs. Ship To: Pick Up At Katech Inc. Supertech Bronze Valve Guides. However, please keep in mind that everything suggested in this article is performed at your own risk. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. 57 stainless steel valves. Green line: 3 angle valve job Blue line: 3 angle valve job plus 30° backcut on the valve Overall gain in flow @. They will make more power than it's twin in aluminum. The porting and polishing work depends on the particular application of that head. Based on this test, we can reasonably conclude that the more air our engine can move, the more helpful that additional plenum volume will be with this manifold. This illustrates how even the mildest of engine builds will benefit from the addition of a decent valve job. 3, and the gains weren't worth the cost for most on a forced inducted engine imo. 72 RR, GT40 tubular I/T, 65mm tb, X3Z ecu, 24lbrs, hfp255fp, 1 5/8 ceramic shortys, Bassani catted X-pipe, magnaflows, E-fan ,pullies, 3. I was thinking about doing this. #N#Pickup Location Info. Most common head used for K20/24 builds. 500″ lift: 14cfm. 2L LT1 engine! The TSP heads/cam package will include the following items: Precision Race Components CNC-Ported Gen 5 LT1 or LT4 Cylinder Heads, On Exchange. This is a description of basic porting techniques used to port a stock VW casting, Type 1 heads. While I have everything apart I was planning on doing some porting to the head and intake. The port and chambers are carefully designed to provide the best combination of high flow capabilities and improved port velocity. HVH Brodix ASCS/SUPR head. As with any big-ticket purchase, doing your. To alleviate some of the financial pressure, you can send your cylinder head to a machine shop for the porting. Rare AF to find in the states. before the heads i was running the stock 806 1998 heads and a frost mail order tune based on those mods. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. I was considering a good ported LSA heads and aftermarket cam combo mainly due to price. this is a great match for us since we use RBC (accord euro R) manifold stock and the way our heads are ported. Jump to Latest Follow I have searched and read that a typical gain of swapping non-ported LS6 heads on an LS2 bolt-on engine is 20-30whp. This is the info from HHPs website. See Pro RBC for big valve alternative. • Skunk2 Ported Head • Skunk2 Stage 3 Cams • Comp Ratio Increased to 11:1 260 - >292 178 - >202 K20A2/K20Z1 CARB EXEMPT TURBOCHARGED ENGINE STEP 1 • Smog Legal Turbo Kit • Performance Exhaust 183 - >236 178 - >217 86mm X 86mm 2. 450-inch lift and 7 cfm at. Even in K20 head and K24 bottom end applications, porting and polishing the head is seldom done. Supertech Bronze Valve Guides. Since it's not the head port that is smaller, there won't be a blockage situation. Designed for Kauffman Super Wedge and High Port heads, can work with wide port Edelbrock heads too. 25cleaver about 5k. Just the thread I needed. it will not tell you where the adjustments need to be made, that is. Note that the ported LS1 head with the LS6 manifold out flows the ported LS6 head up until. Now here is my real question Would a ported K24a2 head that is ported flow and allow do the high revving of a ported z3 head? I am looking to spin I 8k plus Money isn't the issue, I just have a K24a2 heading sitting around that i could port. the numbers the car put up were:. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. Flow numbers from 387- 427cfm have been achieved). 73's, steeda triax, King cobra clutch, eaton lsd, alum DS. 260cc CNC Porting Package Our Budget CNC porting for GM L92's alleviates the primary restrictions in the head. You'll also have a head that can be repaired, a head that is less prone to detonation, a head that costs less to have ported if you decide to do that down the road. There are various different views on this and other forums on home brew. CNC Porting Service. 300 237 176. Is there any major advantage or disadvantage to a port and polished head. Our gen 5 L83 & L86 cylinder heads and camshaft package is a must for the enthusiast looking to use the full potential of their 5. Section B, the turn into the seat area, flows some 200 cfm. Start off by draining all fluids, removing the clutch and flywheel and bolt it to an engine stand. Fitting big valve kits, carrying out port matching and head flowing will also lift torque, and importantly will give you raising the torque increase on other parts. **Subscribe for build updates and other cool ish** IG: dailydriven. with a 23p bravo cut down to 14, more like 13 7/8, at 4850 it went 62-63 regularly. Port openings: N351 - 1. 0 Sc engine on somewhat of a limited budget as per this thread and will be doing the head porting myself, initially to save money, but now more to try and test the below views on the topic from a home DIYer's point of view, and ultimately have the satisfaction of having ported my own heads. The line of head options available from 4P allow you to pick and choose the right one for your build goals. The porting and polishing work depends on the particular application of that head. The Y8 flows fine up to 400HP??? No. Generally, I. put a 24 on and couldnt turn it, I dont remember. When the oversized intake valve is used in conjunction with the superior exhaust runner of the Stage 2, horsepower gains are very impressive out of the box, and phenomenal when fully ported. This is a description of basic porting techniques used to port a stock VW casting, Type 1 heads. But if you are looking for an all out RACE head then this probably isn't for you. Ported heads yield more power and lower boost, so it's preferable, imo. This is why most shops offer head porting in different stages. Buy a z3 or type r head and port it myself 3. Categories: CNC Ported GM Cylinder Heads, Cylinder Head Porting Services, LS, LS1. The porting and polishing process is broadly the same for all cylinder heads. What kind of gains should I expect, if any, on a stock turbo. Then you would port match the intake runner ports to the head to create a smoother incoming flow of air (eliminate turbulence) thereby increasing. Truth be told, both the cam timing (skewed for. At King we've been porting, reworking, flow bench testing and dyno testing Honda cylinder heads for over 25 years. We had very similar mods except for a few differences. Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. About the Author: Dave Localio is a long-time friend of ours and the owner/operator of Headgames Motorworks, a cylinder head specialist founded in New Jersey in 2001. the larger LS6 port runners (220cc). BTR Stage 2 cam. These modifications will increase airflow up to. Rare AF to find in the states. Pickup Location Info. Ported heads yield more power and lower boost, so it's preferable, imo. To properly analyse and validate the job, a head should be tested first on an air flow bench which measures the volumetric flow rate (how much air is getting in and out of the head). Truth be told, both the cam timing (skewed for. December 8, 2012 Ted Eaton. Ask any reputable head porter and/or engine builder the key. On a Gen 3, my opinion is to port the intake manifold and heads together. Modular Head Shop Stage 1 CNC Ported Cylinder Head Package for 5. this is a great match for us since we use RBC (accord euro R) manifold stock and the way our heads are ported. The airflow through the heads is measured in CFM's (cubic feet per minute). If the heads are ported to the max the resulting power band will be very narrow. 2L L86 engine! The TSP heads/cam package will include the following items: Precision Race Components CNC Porting L83 or L86/LT1 CUSTOMER-SUPPLIED Cylinder Heads. 4L (Apache Heads) CNC Ported Pro-Grade Cylinder Heads (2011-2019 6. 020 ti get the compression up to over 10:1 and custom grind EPS and you will be more than happy Jun 7, 2011 #9. Tell a Friend About This Product. the cam was in the 230 @. EQ 200cc iron SBC head. CNC Ported for 2. I can imagine that a 40 or 50 cfm improvement does wake any horses, and if just a few. Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. 200 178 137. 2L L86 engine! The TSP heads/cam package will include the following items: Precision Race Components CNC Porting L83 or L86/LT1 CUSTOMER-SUPPLIED Cylinder Heads. 660" Dual Valve Spring Kit with PAC. Does anyone have any info, flow numbers, or dyno results to speak for one or the other? On another note, if I install GT350 heads, will I have to install GT350 headers to match?. Check out the results here and in the September 2012 issue of Muscle Mustangs & Fast Fords Magazine. View Enlarged Image. The valves have been upgraded to 1. EDIT: Flow figures included Chevy performance CNC Ported LS3 Heads: Valve Lift (Inches) Intake Flow (CFM) Exhaust Flow (CFM). Lingenfelter CNC ported cylinder heads have ports and chambers carefully designed to provide the best combination of high flow capabilities and improved port velocity. Get some porting templates to help with port shape. Also note how the Edelbrock heads offer a clearly superior average E/I percentage of 70 versus our ported iron heads at 57. CNC Porting Service. What Is Cylinder Head Porting, And How Does It Increase Horsepower? It's a job for only the most-skilled of mechanics, but head porting can lead to some impressive power gains if performed properly. Check out the results here and in the September 2012 issue of Muscle Mustangs & Fast Fords Magazine. Is there any major advantage or disadvantage to a port and polished head. Im getting some trick flow twisted wedge heads with 1. But if you are looking for an all out RACE head then this probably isn't for you. i have seen some posts on other ls based forums where guys are seeing about 20-40whp with ported 243 heads on stock cammed ls1's. 23" Performer RPM - 1. Head porting generally is about flow, more flow = more fuel = more HP. I'm interested in the opinions in this thread. 3, LS1, LS6, LS2, LQ4/9) to us for porting. CNC Port Gen 5 LT1/L86 Cylinder Heads (PAIR) CNC Porting Service List: $899. I would put in the 1. I would love to see 550 plus na to the wheels. Continuous duty at high rpm and in endurance racing with very high oil temperature, this cavitation can be catastrophic. Use to increase intake and exhaust flow as well as torque and horsepower. Section B, the turn into the seat area, flows some 200 cfm. The result is a ten percent improvement over the unported LS9 head. I do not have the adjustable push rods, so they will have to pull the gas tank. This is a highly flow efficient, rectangular cross-section straight tube and flows 300 cfm. How many kept the RBB-3(1mm over) head and how many swapped over your k20z3 head? I did see quite a difference on a few different builds that used the k20 head and saw up to 20hp gain (K20a. We're adding CNC-ported heads to a Coyote 5. The 90-degree V6 head is on the bottom with a stock 5. 3ST1-CUSTOM GM Factory 5. HVH Brodix ASCS/SUPR head. To alleviate some of the financial pressure, you can send your cylinder head to a machine shop for the porting. I was considering a good ported LSA heads and aftermarket cam combo mainly due to price. But for your hard earned money, dollar-for- dollar a Stage 1 Ported or Fully CNC Ported Intake Manifold is a much better investment! Intake Manifold FAQ's Free Custom Camshaft : Now, with your purchase of a complete set of modified heads and a matching, modified intake, we will supply a custom ground flat tappet camshaft designed specifically. 350-inches lift to 73. About the Author: Dave Localio is a long-time friend of ours and the owner/operator of Headgames Motorworks, a cylinder head specialist founded in New Jersey in 2001. 1 Head Porting K20a-K20z-K24a Recommnded for up to-310whp All-Motor-93oct Pump Gas/340-350whp-E85/M5, & 400- 1000whp Turbo Applications-Professionally hand ported - Reshaped ports -Reshaped bowls -Blended bowls -Polished & unshrouded combustion chambers -KMOD Street Race 5 angle valvejob -Includes CNC. Richard Holdener writer. Quote Reply Topic: Cylinder Head Porting Posted: Feb/21/2013 at 4:08am Now that I have had my bench for a little while and have learned a tremendous amount about the AMC cast iron head ports from hours of time spent on testing I see what it takes to make these heads flow well. I gasket matched the intake ports and blended them to the existing runner radius at the ports. Has outer intake manifold bolts hole moved away from ports 1/2" for larger port work. with gains of 20 to 25 hp at the top. Buy a z3 or type r head and port it myself 3. Slow-cut, precision 5-axis CNC porting along with unique 4P-designed, power producing. 650 spring kit and mi $1,659. The heads are used in Subaru's producing 400HP to over 1000HP. Keep in mind aside from the HP gains you'll yield from a better set of heads, you'll also gain performance from having a lighter head. Free shipping. You can check out the details in this To Port or Not to Port article. Our stage 1 porting service will include the re-use of the stock vales. Ferrea Competition Plus Valves. As cast ports are app. Our stage 2 program takes our stage 1 port design to the next level and also adds a new redesigned fully cnc- machined combustion chamber. org) and others that used the RBB-3 head and made 260whp+ does any one know what head flows better as FACT with cfm #? Also besides power. this discussion is meant to be discussed based on a k24 bottom end. Trick Flow 320cc as cast heads bare $1650 -Hand ported Trick Flow pair $2350 (Available in a variety of sizes to fit your engine needs. 2 Ported RBB TSX Head - $ 1,799. Also is the only K head that is factory ported – has an ‘NSX’ port job. Then you would port match the intake runner ports to the head to create a smoother incoming flow of air (eliminate turbulence) thereby increasing. CNC ported blowers, heads from WCCH, new Eaton rotor packs for your LSA blower, Mamo ported throttle bodies and more: [email protected] Dynamicflowconcepts. My only concern is that the kit is intended for stock valve sizes (2. Since the highest speed and longest duration airflow within the port is at or near the valve seat, optimizing airflow in this area is especially important. Mill the heads maybe. 3 GM LS Total Engine airflow offers multiple stages of porting for the 4. K20 Turbo upgrades The more air to get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes massive power gains. Does anyone have any info, flow numbers, or dyno results to speak for one or the other? On another note, if I install GT350 heads, will I have to install GT350 headers to match?. All heads are cleaned in an u. He ordered the 1st set heads from Josh to test on his Mighty Challenger. Why? Because it is common knowledge, However lets have a look at what the process is for your cylinder heads that gain so much horsepower & torque! CNC machining of your cylinder heads intake port; CNC machining of your cylinder heads exhaust port; CNC machining & porting of the combustion chamber of your cylinder heads. 78:1 with the 305 cyl and this was with 8. The standard cylinder head runs out of steam at 323 CFM and. K20 Turbo upgrades The more air to get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes massive power gains. 500″ lift: 14cfm. A small-block Chevy that made 404 hp on stock factory 492 heads delivered 482 hp on a set of fully ported Dart 200-cc-port aluminum heads. Has outer intake manifold bolts hole moved away from ports 1/2" for larger port work. 2 Ported K20a2 - $ 2,160. The intake port is designed with a cast "ski jump" on the port roof which is there to increase port flow velocity. 73's, steeda triax, King cobra clutch, eaton lsd, alum DS. I have a 351W and would like to port the heads. CNC Ported for 2. GM L92/LS3 CNC Ported Clinder Heads 2. For all B16A, B18C, B18, B20, H22A, ZC, & D-series motors. Modular Head Shop Stage 1 CNC Ported Cylinder Head Package for 5. This one is owned by a k20a. Then the exhaust side is a radius job since you don't need the edges of the seat for fuel shear on the exhaust side. I have seen some considerable gains can be had from porting the stock coyote heads, but the cost is as much or more than the GT350s. Start off by draining all fluids, removing the clutch and flywheel and bolt it to an engine stand. These modifications will increase airflow up to. The engine will love the upgrade but your wallet may not. Used Turbo Kit Parts, Used Suspension Parts, etc, etc. The recirculation fitting on K24s is typically part of the intake manifold which isn't on K20 intake manifolds. 2 on the 1/8mile. Truth be told, both the cam timing (skewed for. the vales sizes used in the early 351W heads are best in the small chamber 289 heads. Milling involves removing material from the cylinder head (or block deck surface where the heads and block meet) to effectively reduce the volume of the combustion chambers. Includes full "Port & Polished" Head, high performance valve job, & head resurface. A head can be engineered for maximum power, or for minimum fuel usage and. In fact, on the Honda D-series, B-series and K-series cylinder heads I have had ported and flowbench tested, as much as 30-40% of the improvement to airflow has come from work done in the bowl area. Green line: 3 angle valve job Blue line: 3 angle valve job plus 30° backcut on the valve Overall gain in flow @. what i want to know is what is the actual difference between a k24 and a k20 head? is it worth getting a k20 head and paying for that price tag? now i realize if i did go k24 head i would need to use k20 intake manifold and throttle body because of the throttle-by-wire on k24 head if it's from TSX. Today's aftermarket cylinder heads come with a high price tag. Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. Honda K20/K24 (CRV K24A1, Type S K20A2, Type R K20A) Note: does not fit in RBC, RSP, or RBB TSX castings. Based on this test, we can reasonably conclude that the more air our engine can move, the more helpful that additional plenum volume will be with this manifold. gain on a V-8 A port/polish job that increases your head's efficiency by 40 cfm @ 28" calculates to an approximate 80 H. cylinder heads Livernois offers something that most of our competition just can't match, complete in house cylinder head development from start to finish. It includes disassembly, inspection and cleaning, cutting valve seats with a 3-angle profile, lapping valves, and replacement of valve seals. 550 348 249. ” The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design,. To illustrate the gains offered by both head and cam swaps, we ran the GMPP LS3 crate motor on the engine dyno in stock trim, then after the installation of a set of GMPP CNC LS3/L92 heads. Going from a larger port to a smaller port is not good for flow. 2 on the 1/8mile. We also assemble this head with the standard dual. The line of head options available from 4P allow you to pick and choose the right one for your build goals. because it is! aaron. i'm curious to know your. (add new) yourself. A head can be engineered for maximum power, or for minimum fuel usage and. / CNC Port LS2/LS6/Truck 243, 799, 317, 035 Cylinder Heads (PAIR) #N#Previous Product. Well if you don't do both at the same time, your costs are going to be higher. I gasket matched the intake ports and blended them to the existing runner radius at the ports. Pickup Location Info. Only comes in 4500 series Dominator carb flange. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. “It is a balance between keeping the port volume change small while increasing overall flow. Supertech Bronze Valve Guides. CNC Cylinder Head Porting. HVH CNC ported Brodix 13* SB Chevy cylinder head 282cc. LS Heads: Cathedral-Port vs. You're not going to gain too much in a port/polish, maybe a little extra CFM. At King we've been porting, reworking, flow bench testing and dyno testing Honda cylinder heads for over 25 years. I currently have the engine out and tore down for a head gasket replacement and cam swap. Flow numbers from 387- 427cfm have been achieved). I am taking it in to get the cam brgs upgraded and to replace the cam tensioners. While I have everything apart I was planning on doing some porting to the head and intake. Also note how it tops out at about 0. Comp Height: 30. Increase airflow through the heads and into the combustion chamber and you've got the potential to make more power, since more air in means more power out. We're adding CNC-ported heads to a Coyote 5. Today's aftermarket cylinder heads come with a high price tag. Usually stamped with “RSP-2” on the head casting. 2027 | privacy policy. 1 is ported by hand, stages 2 & 3 are CNC Ported. PERFORMANCE ENGINE BUILDING 201 100,494 views 12:08. 650″ exhaust valves. with a 23p bravo cut down to 14, more like 13 7/8, at 4850 it went 62-63 regularly. 125 Intake and 1. Head - $ 1,000. 6-CFM, an open port increase of 37 percent! With the valve and 32mm Mikuni carburetor in place, flow was up from 65. Our gen 5 L83 & L86 cylinder heads and camshaft package is a must for the enthusiast looking to use the full potential of their 5. The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design, which is constructed with A356T6 aluminum alloy, with the airflow enhancements provided by GM's extensive testing. IMO, whipple > Ported Heads + Ported eaton. 750 Exhaust. 5 vs one with ported heads and kelford 264/272s with similar sized turbos such as 2. Track Eliminator Series Heads with the. 60+ hp gain over stock Dart heads!! Huge gains in torque!!. The object of this tech article is to explain that just “hogging out” the intake port on a pair of heads can easily rob power from your high-performance engine rather than making gains. First the main body, Section A. FED LS1 243/799/317/241 Cathedral Stage 1 Cylinder Heads (set) - Porting Service - Complete (Assembled) WARNING: Cancer and Reproductive Harm - www. if you stuck those cams in Z3 head with Kpro gains will be well over 200whp with CAI/RH/E. Corvette & 2010 Camaro customers can now send in their heads to be ported! Precision Race Components LS3/L92 CNC ported cylinder heads. K20 Head Gasket (You must use the K24 head gasket due to the increased bore) You will also need a service manual for one of the K24 motors or K20A2 for all the torque specs. Drag Cartel CNC Street / Strip Ported Cylinder Heads for the Honda / Acura K Series (K20 & K24) Engines View detailed images (6) Drag Cartel Street / Strip CNC K Series Cylinder heads have been proven to be capable of 400+ Horsepower and 8 second time slips in Jeremy Lookofsky's own All Motor Honda Civic Drag Car. This combination provides excellent horsepower gains while maintaining a strong torque curve. K-Tuned TB Adapter. As with any big-ticket purchase, doing your. The bowl area, and especially the short turn radius on the port floor, are also critical to airflow in most cylinder heads. Hi guys, Just a quick question for the fellas with ported 241s. See all 14 photos. 4L (Apache Heads) CNC Ported Pro-Grade Cylinder Heads (2011-2019 6. Its very nice being at the track with iron heads you ported yourself and people get surprised that's all it has with an 8. 23" Performer RPM - 1. I am chasing 300hp on my '78 3. Again, I bet the difference would be even more significant with a K20 head, and certainly with a built engine. The Newen allows for a 6 angle job that blended into the port better. CNC Heads, Valve Jobs, Head Porting & Milling. Specific question. MLS-5 Cylinder Head Gasket by Cometic Gasket®. 500″ valve lift area to make power with relatively low-lift truck camshafts, whereas the old school Gen I heads liked higher-lift camshafts to make their power. The ported 170 head (green curve) took advantage of the Dart's inherently good as-cast form by allowing effective porting by simply refining the as-cast form. Section B, the turn into the seat area, flows some 200 cfm. " Porting an engine The inlet and outlet ports on the engine block are usually larger than those of the manifolds that connect to them. Rare AF to find in the states. Quote Reply Topic: Cylinder Head Porting Posted: Feb/21/2013 at 4:08am Now that I have had my bench for a little while and have learned a tremendous amount about the AMC cast iron head ports from hours of time spent on testing I see what it takes to make these heads flow well. KMOD Stage: 2 K20 Cylinder Head (348cfm) Customer Supplied Cyl. World renowned for our work building race winning pistons, Wiseco utilizes experience from a diverse background of the most sophisticated sport compact engines. We've got them here with commentary on each. If he supply the heads and ported and finished it, "YES" i will gladly pay 700 for the set of heads but this was not the case. Cylinder Head Services Livernois offers something that most of our competition just can't match, complete in house cylinder head development from start to finish. 25cleaver about 5k. List: $899. In fact, on the Honda D-series, B-series and K-series cylinder heads I have had ported and flowbench tested, as much as 30-40% of the improvement to airflow has come from work done in the bowl area. 60+ hp gain over stock Dart heads!! Huge gains in torque!!. 3 truck heads which use the GM casting# 706 or #862. They do not allow you to run as much compression or timing as alumium heads, and they are much heavier than aluminum heads. They aren't mutually exclusive, but making more HP usually comes at the expense of gas mileage to some extent. Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve quantity of the air flow. Guys, I am planning on a boosted k20/24 with a goal of 750-800hp. It includes disassembly, inspection and cleaning, cutting valve seats with a 3-angle profile, lapping valves, and replacement of valve seals. Richard Holdener writer. Lingenfelter #243 casting LS6, LS2 cylinder heads are precision CNC machined in house to insure that exact tolerances are maintained. M2 Race Systems in New Jersey offers its CNC-ported Three-Valve heads for about $1,700, and Blow-By Racing sells its CNC-ported heads for around $1,900. Head looks similar to that of a K20Z3 & K24A2 head w/side mounted water neck. For all B16A, B18C, B18, B20, H22A, ZC, & D-series motors. gains 6-10 Whp!!! -excellent throttle response-port matching-ported inside-Trumpet d. 1986 Mustang GT, Canyon Red, mods- AFR 165s,Vortech V3, scorpion 1. If you have stock heads and are shopping for either pair ( AFR or TW ), you'll need roller rockers with the AFR unless you plan to keep the stock sled fulcrum pieces of junk and your stock pushrods. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. as there has been alot of good work there. This is because of shrouding and port size. I can imagine that the intake flow gains much horses, because suction on the intake is vacuum from zero upto minus 0,xx bar. 400 302 228. Buy a z3 or type r head and port it myself 3. HVH CNC ported Brodix 13* SB Chevy cylinder head 282cc. Continuous duty at high rpm and in endurance racing with very high oil temperature, this cavitation can be catastrophic. I have a 351W and would like to port the heads. ” The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design,. CNC Cylinder Head Porting. Recommended Use : All Motor Street/Race; Road Race; Turbo and Supercharged ; Suitable for all out 2. And while concerns about durability are logical - porting does remove. with a 23p bravo cut down to 14, more like 13 7/8, at 4850 it went 62-63 regularly. PPR group N spec ported oem intake manifold and Tb. The intake port entries for the V6 and 5. Our CNC porting program centers around the Subaru EJ25 V, W and D series cylinder heads. 98 Add to cart; FED Hemi 5. When the oversized intake valve is used in conjunction with the superior exhaust runner of the Stage 2, horsepower gains are very impressive out of the box, and phenomenal when fully ported. 500″ lift: 14cfm. 3L L83 and 6. It's not really worth the money to drop that much into re-working a set of GT40P heads. Lingenfelter #243 casting LS6, LS2 cylinder heads are precision CNC machined in house to insure that exact tolerances are maintained. The porting process should begin and end with a flow bench. K20 Head Gasket (You must use the K24 head gasket due to the increased bore) You will also need a service manual for one of the K24 motors or K20A2 for all the torque specs. Too expensive! I don't recommend porting 906 heads unless your rules require iron heads or you just love to spend money 'cause you think 906 heads are cool, OR unless you port them yourself. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. the larger LS6 port runners (220cc). Again, I bet the difference would be even more significant with a K20 head, and certainly with a built engine. The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design, which is constructed with A356T6 aluminum alloy, with the airflow enhancements provided by GM's extensive testing. Listen, we port 906 heads but we are in Idaho. 1 Head Porting K20a-K20z-K24a Recommnded for up to-310whp All-Motor-93oct Pump Gas/340-350whp-E85/M5, & 400- 1000whp Turbo Applications-Professionally hand ported - Reshaped ports -Reshaped bowls -Blended bowls -Polished & unshrouded combustion chambers -KMOD Street Race 5 angle valvejob -Includes CNC. A ported head with standard valves will run out of steam at 332. December 8, 2012 Ted Eaton. P4120437 Porting Template, 2. Cylinder head porting has been an over-used term for the last 20 years, and despite all the words written about this process, you can't go more than 10 minutes with any group of hot rodders before someone uses the term "port and polished," which merely reveals their ignorance on the subject. PRB head / JDM K20A, K20A2/K20Z1 – 2nd best flowing head CFM wise. The flow of the 170 or 195 Dart head was a huge increase from stock. as there has been alot of good work there. You can check out the details in this To Port or Not to Port article. We had very similar mods except for a few differences. 650 spring kit and mi $1,659. | 2097 bart ave. Bigger Valve's & Port's are one advantage & depending on the year of your 302 the combustion chamber will be smaller as well resulting in increased compression. Without headers, ported head and either stock or aftermarket port matched intake with flex fuel is the route that I want to take. Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve quantity of the air flow. Honda K20/K24 (CRV K24A1, Type S K20A2, Type R K20A) Note: does not fit in RBC, RSP, or RBB TSX castings. The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design, which is constructed with A356T6 aluminum alloy, with the airflow enhancements provided by GM's extensive testing. Designed for Kauffman Super Wedge and High Port heads, can work with wide port Edelbrock heads too. Comp Ratio: 9. the vales sizes used in the early 351W heads are best in the small chamber 289 heads. Again, I bet the difference would be even more significant with a K20 head, and certainly with a built engine. On a mild 1776cc engine build, this modification alone could account for an increase of 10bhp or more. Includes full "Port & Polished" Head, high performance valve job, & head resurface. The recirculation fitting on K24s is typically part of the intake manifold which isn't on K20 intake manifolds. #N#Pick Up At Katech Inc. Track Eliminator Series Heads with the. Now here is my real question Would a ported K24a2 head that is ported flow and allow do the high revving of a ported z3 head? I am looking to spin I 8k plus Money isn't the issue, I just have a K24a2 heading sitting around that i could port. Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. Fully Blended bowls Ported and blended runners. World renowned for our work building race winning pistons, Wiseco utilizes experience from a diverse background of the most sophisticated sport compact engines. 0L Coyote Ti-VCT Cylinder Heads. Lingenfelter #243 casting LS6, LS2 cylinder heads are precision CNC machined in house to insure that exact tolerances are maintained. Supertech Iconel Extreme Duty Exhaust Valves. We start with Dart 200cc/49cc head and CNC port them to 217cc intake runners and 63cc combustion chambers. 267cc Full CNC Porting Package Our Full CNC porting for GM 823 L92's is a great budget head for 600hp+ builds. Ported heads yield more power and lower boost, so it's preferable, imo. Today’s internet research is a tool as important as your die grinder when it comes to head-porting basics for the novice. Should I be maybe getting my heads done while they have gone that far or is the. 72 RR, GT40 tubular I/T, 65mm tb, X3Z ecu, 24lbrs, hfp255fp, 1 5/8 ceramic shortys, Bassani catted X-pipe, magnaflows, E-fan ,pullies, 3. I am taking it in to get the cam brgs upgraded and to replace the cam tensioners. #N#Pickup Location Info. Too expensive! I don't recommend porting 906 heads unless your rules require iron heads or you just love to spend money 'cause you think 906 heads are cool, OR unless you port them yourself. (add new) yourself. The bowl area, and especially the short turn radius on the port floor, are also critical to airflow in most cylinder heads. PRB head / JDM K20A, K20A2/K20Z1 - 2nd best flowing head CFM wise. 3L 862,706 Our stage 1 cnc program is built using our latest valve job and port design for the 5. The object of this tech article is to explain that just "hogging out" the intake port on a pair of heads can easily rob power from your high-performance engine rather than making gains. The valves have been upgraded to 1. Show me the ski-ramp in a K20Z3's head. When I was 18 back in 2001 I ported the 289 heads im running now which made 270rwhp and will be porting a set of 69 351w heads for the same motor. So who makes the best LSA ported heads? As of now I've only really seen the WCCH stage 2's but Livernois has a nice set of ported CNC heads as well. 300 in size. These heads are designed to be used in 95-98″ applications, and mild 103-107″ touring or low-mid torque-specific applications. Just got done porting my vortec 062 heads. 23" Performer RPM - 1. 650 spring kit and mi $1,659. The ported LS3/L92 heads featured sizable intake port volumes of 279 cc; while not much of an issue on our 468ci stroker, that might be a tad large for a small-displacement LS. I was thinking about doing this. 74 ex valves, and pocket port the area under the valve. Stages 2 & 3 also get over-sized intake valve seats. We've got them here with commentary on each. This is the exception though, and not the rule. 74 ex valves, and pocket port the area under the valve. 73's, steeda triax, King cobra clutch, eaton lsd, alum DS. Green line: 3 angle valve job Blue line: 3 angle valve job plus 30° backcut on the valve Overall gain in flow @. 2L L86 engine! The TSP heads/cam package will include the following items: Precision Race Components CNC Porting L83 or L86/LT1 CUSTOMER-SUPPLIED Cylinder Heads. I was considering a good ported LSA heads and aftermarket cam combo mainly due to price. You will spend more on the whipple, but, I think it is worth it for the short run and the long haul. Ferrea Competition Plus Valves. put a 24 on and couldnt turn it, I dont remember. Summary Customer Reviews (13) DOWNLOAD FLOW DATA PDF. Cams, Ported head, increased throttle body and MegaSquirt. Cleaning, Stage 1 CNC Program with Hand Blended Bowls, Bronze Guides, Performance 4 Angle Valve Job, New Viton Valve Stem Seals, Stage 2 PAC Springs and Retainers, Surfacing and Assembly. / Rear Height 6. Note that the ported LS1 head with the LS6 manifold out flows the ported LS6 head up until. 080-inch, making it 2. E85 conversion, Tuned by Cal Speed and Performance in Bakersfield. I can imagine that the intake flow gains much horses, because suction on the intake is vacuum from zero upto minus 0,xx bar. He ordered the 1st set heads from Josh to test on his Mighty Challenger. 23" Performer RPM - 1. K24 Engine Block/K20 Cylinder Head Build - 2. The intake port is designed with a cast "ski jump" on the port roof which is there to increase port flow velocity. CNC Heads, Valve Jobs, Head Porting & Milling. You gain more power, get a more efficient blower and probably lower IAT2 temps. it will not tell you where the adjustments need to be made, that is. Rare AF to find in the states. Continuous duty at high rpm and in endurance racing with very high oil temperature, this cavitation can be catastrophic. Supertech High Performance Valves K20-K24. Lingenfelter offers our CNC ported version of the LS7 aluminum cylinder head used on the 2006-2009 C6 Corvette ZO6 that is the same as what is used in our 630 horsepower & 660 horsepower C6 ZO6 packages. the larger LS6 port runners (220cc). 3L 862,706 Our stage 1 cnc program is built using our latest valve job and port design for the 5. At King we've been porting, reworking, flow bench testing and dyno testing Honda cylinder heads for over 25 years. The object of this tech article is to explain that just "hogging out" the intake port on a pair of heads can easily rob power from your high-performance engine rather than making gains. i had a 350sbc with #416 cyl heads and it ran very well ,the compression was around 10. dart machinery, ltd. 300 237 176. 10" Super Victor - 1. They will make more power than it's twin in aluminum. 7 Eagle CNC Ported Cylinder Heads - Porting Service $ 2,149. the numbers the car put up were:. The power output of the 468 jumped from 692 hp at 6,500 rpm with stock L92 heads to 720 hp at 6,700 rpm with the CNC-ported versions. A small-block Chevy that made 404 hp on stock factory 492 heads delivered 482 hp on a set of fully ported Dart 200-cc-port aluminum heads. We have designed the adapter to work with all K24 heads including the K24Z-Series (R40) heads. To illustrate the gains offered by both head and cam swaps, we ran the GMPP LS3 crate motor on the engine dyno in stock trim, then after the installation of a set of GMPP CNC LS3/L92 heads. However, please keep in mind that everything suggested in this article is performed at your own risk. 500″ lift: 14cfm. M2 Race Systems in New Jersey offers its CNC-ported Three-Valve heads for about $1,700, and Blow-By Racing sells its CNC-ported heads for around $1,900. 5:1 pistons. 243 ls6 head dyno results!! my main mods are in my profile but basically i have most bolt-ons plus 243 heads and still on the stock '98 cam. Tell a Friend About This Product. KMOD Performance Cylinder Head Porting is offered in three stages. I am debating whether or not to get a set of ported 241s when i get a cam change, I am going for a 228 230 110 or 112 cam and want to know if the $1500 or thereabouts for what only seems to be a small hp gain is worth the cash as the standard heads are pretty good anyway I thought. 78:1 with the 305 cyl and this was with 8. CNC Porting Service. So what would be a realistic range for a stage 2 set of ported LS6 heads on a bolt-on or medium sized cam car? I tried searching but couldn't find anything solid, just. RSX-S (04-05) comes with PRC (type R) cams matted to PRC (type R) manifold in A2 with KRO is close to type R k20a performance on Kpro. Pickup Location Info. the cam was in the 230 @. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. 0 i-DOHC VTEC. Has outer intake manifold bolts hole moved away from ports 1/2" for larger port work. Cylinder head porting is the process of modifying the intake and exhaust ports of an engine to improve the quality and quantity of the air flow. Recommended Use : All Motor Street/Race; Road Race; Turbo and Supercharged ; Suitable for all out 2. Base prices on the heads differ almost $400. StoreFront / Cylinder Head Parts & Services / Gen 5 LT / Cylinder Head Services / CNC Port Gen 5 LT1/L86 Cylinder Heads (PAIR) Next Product > View Enlarged Image. CNC Port Gen 5 LT1/L86 Cylinder Heads (PAIR) CNC Porting Service List: $899. I was considering a good ported LSA heads and aftermarket cam combo mainly due to price. CNC Porting Service. 6-CFM, an open port increase of 37 percent! With the valve and 32mm Mikuni carburetor in place, flow was up from 65. To alleviate some of the financial pressure, you can send your cylinder head to a machine shop for the porting. Endyne cut open the plenum to fully gut this beast out and then welded the plenum back. with a 23p bravo cut down to 14, more like 13 7/8, at 4850 it went 62-63 regularly. PRB head / JDM K20A, K20A2/K20Z1 - 2nd best flowing head CFM wise. From an Electra to a Skylark, Buick cylider heads deserve 5-Axis CNC and More Horsepower too. Comp Height: 30. The porting and polishing work depends on the particular application of that head. The valves have been upgraded to 1. changing the shape of your e7 will most likely hurt flow. gain on a V-8. I have a 2006 streetglide with a 95 kit and 203 cams. honestly with the valve job, s2 dual v springs, stage 1 s2 cams, Ct intake, hfc header and exhaust i only see gains up top about 6k up and thats with a basic tune. 76" Intake 1. Buy The Drag Cartel head that is already ported 2. “It is a balance between keeping the port volume change small while increasing overall flow. 4 Liters Untamed Autowave builds a poor man's TSX motor for swapping into an EM2 Civic chassis. Our stage 1 porting service will include the re-use of the stock vales. Flow numbers from 387- 427cfm have been achieved). It doesn't really matter what the port looks like to the eye, but rather to an air molecule. Is there any major advantage or disadvantage to a port and polished head. 300 237 176. 700 363 258 PRC LS3/L93 CNC ported heads: Lift Intake Flow Exhaust Flow. The HHP/BES heads are track proved out to pick up a 25 to 30 HP gain. 85 350(260merc), ported stock heads, rpm intake, quadratjet, ported manifolds and risers. We have designed the adapter to work with all K24 heads including the K24Z-Series (R40) heads. BTR Stage 2 cam. I only gained roughly 40hp/32tq from all these mods. Modular Head Shop Stage 1 CNC Ported Cylinder Head Package for 5. Recommended minimum head flow is 370/380 cfm. Use to increase intake and exhaust flow as well as torque and horsepower. These heads are designed to be used in 95-98″ applications, and mild 103-107″ touring or low-mid torque-specific applications. 0L powerplant to see how much of a difference they make. But for your hard earned money, dollar-for- dollar a Stage 1 Ported or Fully CNC Ported Intake Manifold is a much better investment! Intake Manifold FAQ's Free Custom Camshaft : Now, with your purchase of a complete set of modified heads and a matching, modified intake, we will supply a custom ground flat tappet camshaft designed specifically. Other dynos I have seen show gains anywhere from 40hp to 75hp from just the 274 Cam, LT's, and ported TB. 260cc CNC Porting Package Our Budget CNC porting for GM L92's alleviates the primary restrictions in the head. See Pro RBC for big valve alternative. Our gen 5 LT1 cylinder heads and camshaft package is a must for the enthusiast looking to use the full potential of their 6. He ordered the 1st set heads from Josh to test on his Mighty Challenger. I currently have the engine out and tore down for a head gasket replacement and cam swap. RSX-S (04-05) comes with PRC (type R) cams matted to PRC (type R) manifold in A2 with KRO is close to type R k20a performance on Kpro. There are a lot of shops that offering porting, or CNC porting, or cylinder head machining. 2 Ported K20z3 - $ 2,160. Much later we found the. because it is! aaron. To better understand how air flows through a head on its way to the combustion camber, lets take a look at the anatomy of a. ” The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design,. World renowned for our work building race winning pistons, Wiseco utilizes experience from a diverse background of the most sophisticated sport compact engines. Recommended minimum head flow is 370/380 cfm. Note that the ported LS1 head with the LS6 manifold out flows the ported LS6 head up until. The result is a ten percent improvement over the unported LS9 head. dart machinery, ltd. You will spend more on the whipple, but, I think it is worth it for the short run and the long haul. To alleviate some of the financial pressure, you can send your cylinder head to a machine shop for the porting. 4L HEMI Engines) - HHP-64PPH Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best). This is what happens when intake flow goes up from 184 cfm at full valve lift to 303 cfm, and exhaust from 124 to 210 cfm. Not exactly ideal for a streetcar. Fully Blended bowls Ported and blended runners. All of our heads include a KMOD Street Race 5-Angle Valvejob, CNC Head Resurface, & CNC KMOD Logo. Should I be maybe getting my heads done while they have gone that far or is the. 805" for the intakes and 1. com, the official website for Car Craft Magazine. A head can be engineered for maximum power, or for minimum fuel usage and. Ferrea Competition Plus Valves. This is a description of basic porting techniques used to port a stock VW casting, Type 1 heads. The 516s can be made to flow well with the right port work. I have seen some considerable gains can be had from porting the stock coyote heads, but the cost is as much or more than the GT350s. I was thinking about doing this. This last graph shows the power gains from the day. The Y8 flows fine up to 400HP??? No. This one is owned by a k20a. 660" Dual Valve Spring Kit with Titanium Retainers & PAC. This is due to higher flow in the smaller LS1 port runners (200cc) at low lift vs. dart machinery, ltd. CNC Combustion Chamber. 00" Exhaust The 69' Head's are definetly a good head especially if your thinking of throwing them on a mild 302. Heads-Fully port, reshape runners, port match to intake/exhaust gasket, hand blend the short radi (where the hidden power is at), work and reshape into tear drop the valve guide bosses, polish the runners and polish the combustion chambers. #N#Pickup Location Info. Part 21 - Cylinder Head Porting Terms and Tools - 620 HP 454 Big Block Chevy Engine Build - Duration: 12:08. Slow-cut, precision 5-axis CNC porting along with unique 4P-designed, power producing. Comp Height: 30. 500″ valve lift area to make power with relatively low-lift truck camshafts, whereas the old school Gen I heads liked higher-lift camshafts to make their power. HeadFlowInc 7,955 views. 2 Ported RBB TSX Head - $ 1,799. SLP UD pulley. warren, mi 48091 | phone: 248. Porting Templates Die cut clear templates take the guesswork out of porting a set of heads. Modern Muscle Performance Group 87mm Ported TB, big CAM, and ported eagle heads. By the time you get done, you could have gotten a good set of aluminum heads that would outperform the GT40P's. However, a valve job has been known to help in that particular setup. its amazing how the flow is affected by minor mods i seen that the valve and seat angles controls the air speed mostly. i'm curious to know your. Does anyone have any info, flow numbers, or dyno results to speak for one or the other? On another note, if I install GT350 heads, will I have to install GT350 headers to match?. Honda K20 & K24 Parts. Tons of R&D on both the flow bench & engine dyno has created one of the leading LS3/ cylinder heads available! The PRC LS3 cylinder heads porting for customers with existing LS-3 cylinder heads. Just got done porting my vortec 062 heads. They hover at the 155-157 cfm mark @ 10″ @. Reinstalling the head on the flow bench, Jerry set up an open port (entry only) test to sec what improvements had been made. 2L L86 engine! The TSP heads/cam package will include the following items: Precision Race Components CNC Porting L83 or L86/LT1 CUSTOMER-SUPPLIED Cylinder Heads. Modular 4 Valve Heads. Then I further hand-ported those same heads, changed the port and chamber shape, the valve job and short turn curve shape; all responded with gaining 80 to 100 HP (engine gains only, no NOS dyno tests, much higher gains when NOS was used!) as well as shifting entire torque and horsepower curves upwards by 300 to 500 RPM. ” The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design,. The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. As with any big-ticket purchase, doing your. This is a highly flow efficient, rectangular cross-section straight tube and flows 300 cfm. gains 6-10 Whp!!! -excellent throttle response-port matching-ported inside-Trumpet d. Buy a z3 or type r head and port it myself 3. Im getting some trick flow twisted wedge heads with 1.
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