L92 heads on ls2. L76 heads are basically L92 heads for use with a 3.

L92 heads on ls2 054" thickness. The L92 cylinder heads are similar to the LS3 heads except they used a heavier solid stem intake valve. 0L LS2 out of an 2005 Vette, then added some stock L92 heads and LS3 intake manifold w/90mm TB and stock MAF. Great mid-range power is to be had with moderate compression. He did NOT get 35-40rwhp over his previous combo from just the heads but I know his ricer math says so:bomb: May 1, 2009 · Stock LS2 and L92 cylinder-head flow numbers are from the GMPP catalog. May 10, 2007 · 5. 70 60 ft. 055. 550” tall, while the intake ports on the LS7 head are 1. 17:1 with a . 600 lift. So, the general agreement is (but always measure yourself, or have the shop do it) is you have to take . L76 heads are basically L92 heads for use with a 3. While its a novel idea and would see hp/tq benefits in stock engines, a moderately built LS2 can easily attain 400rwhp. 2 liter. Jan 2, 2006 · From the way the article was written, it made it sound like the L92 heads would bolt right up to the LS2 block & intake. LS2 or LS3 throttle body? Accessories: 1. 700 lift. 060 gasket and 66cc milled L92's compression is 10. Feb 1, 2011 · Can anyone forsee any problems mating my milled 64cc L92 head/L76 intake combo to my stock cammed LS2? I plan on switching cams, but it won't be for a little while. 085 bore Any concern with a slightly bigger bore on the gasket? 1 day ago · Chevrolet Performance L92 Cylinder Heads. Replacing the heavy 2 piece L92 intake valve with a stock hollow stem LS3 valve is also a good idea. 3L was run with ported cathedral-port heads, while this 6. You could reuse what you have. 050 , 571-573 cam. I'll soon be putting together an LS3 block with wiseco 4. However, in these two ton street cars, the track results proved all the "internet experts" all wrong. GM bolted on a set of L92 heads and increased the compression to create the LY6. Maybe I read it wrong, but that was the impression I got. The intake valve is offset and has an offset rocker arm. WOT AFR's 11. If you do, make sure you get a wide split cam or you'll make so little power, you'll go backwards when you mash the throttle. LS7 gasket is . Cylinder Head, L92, Aluminum, Assembled, 70cc Chamber, Chevy, LS, Each Trick Flow® GenX® 225 Cylinder Heads for GM LS2 TFS-3061T001-C02 Cylinder Head, GenX Aug 23, 2010 · He tested the Ported L92 (Frankenstein Version) with both his L92 Stage 2 (2. Dec 15, 2010 · Don't get discouraged. Sep 4, 2008 · C6 Tech/Performance - Livernois Motorsports LS2 Head/Cam Packages - LS2 Stage 2 Head/Cam Package 1 Livernois Motorsports Stage 2 CNC Ported LS-Series Cylinder Heads Livernois Motorsports Stage 2 Camshaft GM MLS Head Gaskets GM Exhaust Gaskets ARP Head Bolts Hardened Pushrods NGK TR5 Spark Plugs $2,425. The L92/LS3 builds can make good power but prefer to do it with smaller cams. Mar 12, 2008 · You know I'm a fan of the head milling on the L92. 000-inch bore, and compatibility with both LS1/LS6 and LS3/L92 heads, the LS2 offers the versatility that engine swappers crave. The massive intake valves necessitate a 4-inch-or-larger bore with no other special consideration needed. If you go the 243 route, everything in the new kit bolts right on to the motor. LS3 has a gold blade and opens the opposite direction as LS2. 89 inches - LS1 and LS6 engines can only use LS1, LS6 and LS2 heads. GASKETS ARE SOLD INDIVIDUALLY! Jun 18, 2012 · I know of a few engine builders that won't put L92 heads on a 402 because of valve shrouding. 0L at 530rwhp, I'd say the LS3/L92 head is inferior in that application. GM Head Gasket for LS2/L92/LS3/L99 feature stainless steel faces and are recommended for stock and mildly modified engines. Don't do it. Mar 30, 2013 · Finally completed my l92 head swap and just got it dyno tuned last night. 2006 A4 Torrid Red GTO May 7, 2007 · C6 Tech/Performance - Head Gasket L92 on LS2 - What bore size for the heads? I have a factory 6. Feb 19, 2010 · The LS3/L92 heads appear to be some great heads, especially with guys running big 400+ cubic inch engines. It will be mostly for street use but I like a snotty cam and don't mind a little extra effort in driving a slightly wild setup. 2 will make more power on the basic fundamental principle of more cubic inch and more cylinder volume capacity. 055 gasket= 10. Once the Weiand and FAST manifolds are released they will become even more popular. 070" pistons, compstar rods, new stock crank, ported LS2 intake & throttle body, hand ported 243 LS2 heads, 11:1 compression, TSP 228r cam (228 duration @0. 0 Aug 27, 2008 · C6 Tech/Performance - LS2 heads or cam only? - Has anyone done just heads or just a cam? Looking for a slight power increase and the most efficient way to get there. 650 Texas Speed GM-Style LS2/L92 Cylinder Head gaskets feature stainless steel faces recommended for stock and mildly modified engines. Jan 21, 2022 · RPO codes L76, L77, L96, L98, LC8, LY6, L92, L94, and L9H utilized aluminum cylinder heads with 70cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2. Joe (Leftcoast 32) was running an LS2 with WCCH L92 heads (w/ jackshaft 2300) for the longest time at some serious HP levels. They flow 332cfm out of the box. Feb 5, 2010 · LS3 418, L92 heads, LS3 intake, custom cam, Fast 46 injectors, Kook's long tube headers, Kooks catless mid pipes, DMH e-cutouts, Monster 5 + lw fw, 3. 2004+ Chevrolet Small Block LS Head Bolt Kit by ARP. 0/LS3/L92 heads 6. 99. Dec 26, 2019 · We also liked the fact that the cam test on the 5. Don't worry about porting the heads. 78:1 You also then have a Piston to head clearance of just . 0) Mar 30, 2010 · Free HP Tuners Beginners Tuning Guide Michigan Snowmobiler 1969 Firebird: 7. Nov 27, 2004 · 2006 GTO Black/Black M6 "Charlotte": Ported PRC LS3 Heads / Flowtech AK-47 cam (23x/23x . The trucks TB are just a little smaller. 040) *I think and Cometic 4. Jan 31, 2025 · With its increased displacement, 4. . May 11, 2007 · These heads are intended for the new Gen IV LS2 engine that uses a larger 4. Mar 11, 2010 · Most other aftermarket heads will be over $2000 for the heads alone. 590 /0. Dec 30, 2004 · What does this mean? It means on an LS2, you need to mill the heads . Thats where you lose the little bit of comp. There is a lot of misinformation about cam profiles favoring one head design over another and it would be interesting to see how well these cam specs worked on each application. com your going to have to sort out who acutally knows Sep 20, 2008 · BEWARE OF SCAMMERS. 9". I want to install a set of ls3 heads and intake on my ls2 with a new tune. 5:1cr 9 was used in the Silverado SS/Escalade and had flat top pistons for just over 10:1cr You can swap the LS3/L92/L76 Jan 30, 2010 · C6 Tech/Performance - LSA/LS9 Heads on LS2? - I have been sitting on the side lines during all the L92/LS3 heads on LS2 engine threads. The GMPP catalog does not list flow numbers above 0. Sep 22, 2015 · The L92 and LS3 block was the next evolution in Gen IV block design, bridging the gap in bore size between the previous 4. The L92/LS3 heads have larger relocated valves, larger rectangular intake ports (as opposed to the LS2's cathedral port), as well as increased intake and exhaust flow. 00" bore. view details. These 50-state-legal heads are fully CNC-ported, and a nice upgrade over stock LS1, LS6, or LS2 heads. The GM Performance Parts catalog is now out for 2010 and I am seeing some good internet deals on LSA and LS9 heads. 988-inch bore (vs the 4. Sure, that'd be nice, but there's no exhausts that fit the C5 yet. Lingenfelter offers a CNC ported version of the L92/LS3 aluminum cylinder head used on 2008 production 6. I wouldn't be afraid of running an LS2 at 800-900whp with a forged bottom end, even with a Feb 23, 2025 · Stock 12k mile LS2 block from TBSS. Sorry for any confusion. If you go the LS3/L92 route, you have to get a new intake manifold and rocker arms, as they are specific to the rectangle port heads. [NOTE: Looking to upgrade your L92? Read: L92 6. Oct 7, 2011 · Its know that the LS3 head's chamber has pressure recovery issues when compared to say the LS2 head. West Coast Cylinder Head and TEA both do some nice L92/LS3 heads Dec 31, 2008 · Official L92/L76 and LS3 Heads/Intake FAQ and Information - L92/L76 and LS3 FAQ. 2L based Chevrolet Corvettes and various 2007-2008 L92 L76 6. Cam - custom spec by Patrick G - a "baby" cam by his words. 606 114+3, 6. 590˝ exhaust valves. 4. 93 1/8 1. Other Gen IV updates included provisions for active fuel management (AFM), relocated sensors (the cam sensor was moved to the front timing cover, and the crank sensor plug changed Aug 23, 2009 · The most common mod the yanks do to the LS2 is put L92 heads on and they always make a power gain. There are some good deals out there to be had. Thinking about L92 heads milled to keep the compression the same and the L76 intake/throttle body combo. 051" thick. Still running stock gears in the back. [/COLOR] EPS cam 234/246 . I'm considering the L92's to go with my G5x3 setup but I am concerned the large runners will hurt performance down low compared to my stock heads. 00 + Shipping Jul 8, 2009 · The L92 heads have a larger combustion chamber than the LS2 heads. Mar 30, 2017 · The LS2, LS3/L92, and LS7 heads use production intakes, offer greater port volume and larger combustion chambers that are desirable with forced induction. 4 was used in every truck/van and has dished pistons for around a 9. 2L and 6. What head/intake combo would be superior, L92/LS3 heads with FAST 102mm or TFS 215s/FAST 92? Jul 2, 2009 · I would port theL92 intake at the TB and get a LS3 90mm TB or port the 87MM L92 one. Add 100+ horsepower to your GM LS or Gen 5 LT engine with a Texas Speed & Performance cylinder heads and camshaft package! Our packages will include cathedral port, square port, and rectangular port cylinder heads to accommodate LS1, LS2, LS3, L99, LS6, LS7, LSA, LQ4, LQ9, L83, L86, LT1, and more! Jun 22, 2021 · In terms of head flow, there was a substantial step up from the cathedral-port LS6/LS2 heads to the rectangular-port LS3 heads. 5" Magnaflow Catback Centerforce Clutch RunFile_047 85 Degrees 13% Humidity L92 Heads lightly ported & milled L76 Intake ported LG Motorsports G6X3 Camshaft K&N CAI Stock LS2 MAF Powerbond UDP Dec 8, 2009 · C6 Tech/Performance - ls2 cylinder head upgrade - Ported ls2's or stock ls3's? I hear ls3/l92 heads are the best bang for the buck. I used permatex to hold the LS2 map sensor in place [05 Impulse blue a4-Custom built LSX454, nitrous outlet, engine by G-engines, DSS 8. 8, 4l80e trans, FTI stall, tuned by Heinz Racing:crapfan: Aug 23, 2016 · 1. #lpp761105. Dec 21, 2009 · A friend is building a 402 using the LS7 crank and rods with a custom set of 4. Sep 21, 2015 · The L92 head was the first to boast 330 cfm while being dirt cheap, which started the craze. For example, Jeff Creech at CAM did up a 2005 GTO package that made 425 peak RWHP using this camshaft and long tube headers with cats! and one of his famous tunes. The cost is kept down, but the quality is kept up. 2L Engine Upgrade Guide: Expert Advice for L92 Mods to Maximize Performance. 38 Results . These simple Dec 15, 2006 · LS2 is 4" bore and LQ9 is 3. The first of the Gen IV small-blocks, the 400hp LS2 was first unveiled in the '05 Corvette. 20 intake valve) heads. Jul 29, 2007 · The chamber size is identicle as per the net static compression for a 6. May 27, 2009 · He sourced a low mileage 6. Nov 12, 2009 · I have ARP head and main studs w/ cometic gaskets on a LS2 block and 243's @ 15lbs and meth w/ only 12* of timing all the way up. Rocker arms. Aug 8, 2009 · L92 Heads lightly ported & milled L76 Intake ported LG Motorsports G6X3 Camshaft 100mm Hardcore CAI 100mm LS3 MAF Powerbond UDP Pacesetter 1 3/4" Headers 2. If I remember correctly,,,the LS7 heads are a 12 degree head,,,and are the only production heads that come with that valve angle. Dec 1, 2009 · LS2. 165˝ intake valves and 1. JPracing is going with an iron block I believe as well. ive been told to mill them 30mills to get the same compression as my stock ls2 heads. 050" and 0. LS2 heads are based on the LS1 design, but L76 heads are based on the better-flowing L92 design. 060" (im pretty sure on that gasket, but someone correct me if im off). They are shrouded on the 6 liter 4" bore. 00-inch bore of the LS2 enables it to use LS1/LS6 heads, as well as L92-style heads (including LS3, LS9 and LSA engines). Feb 1, 2009 · L92 heads on a stock cubed LS2 sucks. Using heads designed for larger engines will cause the valve-to-block interference. com street tune (MTR now has a Dynojet 248 chassis dyno) Jun 1, 2008 · Engine building tip: The L92 heads only work on engines with 4. L92 Cylinder Head Assembly • Aluminum performance head • Fits any LS family engine with 4. . Its because the valve is layed too far back in the chamber. As your experience has shown as well as my own compression is key to making the L92 head and ported L76 intake package the perfomer it should be. Jul 9, 2012 · I'm not saying you can't put down some decent numbers with L92/LS3 heads but you will need a good person to tune it and the cam needs to be matched with the heads and intake. 020", as most pistons are . $1,579. 0 LQ4, L92 heads milled 10. Jul 31, 2009 · C6 Tech/Performance - 224/228 cam in LS2 - dyno results --> - My torque project (note the mild camshaft) at Horsepower Sales in Pompano Beach FL is now finished. The pistons (flat top) will put the motor at 12:1 with 64cc heads, which we're hoping will run on pump fuel. Head P/N 12629064 assembled with the following: ARP Hex Head Bolt Kit For LS2, L92, LS7, and mid-year 2004+ LSX-Based Engines. 00 for a set ready to run. Flow numbers can be as high as 373 cfm at . 9:1 compression. I've heard and read that ported L92 heads, matching CAM and L97 intake would be a Aug 23, 2011 · C6 Tech/Performance - Upgrading ls2 with ls3 heads - Have a couple questions about my new project. The results were: Flow Comparison for WCCH L92 Cylinder Heads with L92 Intake Manifolds (CFM at 28. May 31, 2018 · These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, cams, and nitrous oxide. As you learn in this chapter, factory heads can support nearly 700 hp on the right application, but that doesn’t mean ported heads don’t offer any power. LS1 and LS6 blocks will accept only LS1, LS6, and LS2 heads. They say they will bolt up to the LS2 but you have to buy an L76 intake but they are only 475 complete with injectors and 90mm throttle body. If the L76 is rated at 362, the LS2 people would be giving up 38hp if they are essentially bolting on all the components (sans cam) as an L76. oh yea if you go on ls1tech. My torque numbers were low. There is this huge misnomer that the LS3 heads are GIGANTIC when compared to the LS2, but the fact is that the LS3 head only has a CSA thats approx. 030 gasket, 10. These heads are available for a scant $375 from Chevrolet Performance dealers, making them an excellent bang for the buck. My understanding is that they provide superior flow vs the stock LS2 heads, even though the are "as cast". 510" max valve lift • As-cast L92 style intake ports • D-shaped exhaust ports • As-cast combustion chambers. ls2/ls6 cnc cylinder head porting Jan 13, 2009 · The L92 heads are relatively inexpensive compared to high quality aftermarket heads (TFS, AFR, etc) as GM has volume quantities due to the Escalade, Yukon XL Denali, et al. 055" gasket to keep 10. 000" bore or larger • 2. I intend to install a cam at a later date but dont want to ARP Head Stud Kit 234-4317, GM gen IV LS engine LS2 LS3 LS6 LS7 L92, Camaro Corvette G8 GTO CTS V, cam kit, best lowest price offered by WEAPON-X Motorsports ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. 9 1. L92 heads (baby LS7 heads) will fit on a 4" bore engine. 222/230 . 602. Don't forget to list what cam you went with and other supporting mods. Show: LS1/LS2/LS6 - CATHEDRAL PORT 13 items; LS3/L99 - SQUARE PORT 10 items; LS7 - RECTANGLE PORT 8 Jul 1, 2007 · L92 vs LS1 and LS2 Heads - Sick Flow, Less Dough- Tech. stock LS2, unmilled l92's (72cc), . Think about it this way if the afr heads cost 2500 plus a ported 1150 fast intake your looking at 3650 when I could do unported l92 heads with a ported ls3 intake/throttle body an make 470whp. The LS3/L92 are the newer style rectangle port heads. Dec 11, 2020 · L76 intake is rect port and uses a clip like LS2; LS3 throttle body is the same size as LS2. 000 in. Also my target is in the upper 500 HP range. I realize it is not an optimal setup, but I shouldn’t lose power. 00-inch LS2 and the 4. Apr 27, 2013 · Lt1z cam and some jank obx headers, ls3 intake, l92 heads milled, 32-3400 transmission specialties converter, 417/412rw, really just a bunch of junk other than the cam Tooned buy TXBlownTBSS, 12. These head gaskets work for LS3 engines as well. These can be identified by their tall, narrow shape and radiused top profile. These heads are a great choice for a stock-cube build, yet provide plenty of room to grow–giving plenty of material for further porting. I was Complete Cylinder Heads; Complete Cylinder Heads. gm l92/ls3 stage 3 race series cylinder heads - customer cores required. Apr 13, 2007 · Scott, A lot of the performance dealers I work with, prefer cam designs like the HellRaiser-TQ camshaft kit for the daily drivers. What are the differences between L92/LS3 and LS2 style heads? A. 91's, Gforce Stubs, Axles, Aluminum drive shaft, large array of suspension, nitrous. Use LS2 accessory backet and components. 73 gears. 060. The cylinder head ports and chambers are carefully redesigned to produce the best flow characteristics that will provide improved horsepower & torque. LS2 blocks can use LS1, LS6, or LS2 heads, as well as L92-style heads, which include LS3 and LS9 heads. 9 RWHP 395. Lightweight hollow stem LS3 valves will drop right in. 62x 113) / Ported LS3 Intake & LS2 TB / Kooks 1 7/8 LTs w/cats Svede Speed OTRCAI / StolenFox H-Pipe / SLP UDP / Elite Catch Can / LS7 Clutch / GMM Rip Shifter / Pedders / PLX Wideband - HP Tuners - ShoddyTune Apr 9, 2012 · C6 Tech/Performance - LS2 with ported L92 heads and L97 intake? - Hello everybody. To get a Ls2/Ls6 head to flow what a L92/Ls3 head flows will take a lot of work, and you'll never be able to match valve sizes. Just have them milled and enjoy the performance. 13@108. 433. 3. Also, don't forget to list your RWHP/RWTQ if you have it. Nov 16, 2018 · you use LS3 intake & glue the LS2 map sensor- LS3 intake will bolt up to the L92 heads. The Chevrolet Performance L76/L92 Aluminum Cylinder Head is designed to fit any LS family engine with a four inch or larger bore. the stock LS2 heads are 65cc, and the stock gasket is . Comp Cams is recommending a 228-230 @ . Available in . bore or larger Aug 17, 2008 · In testing the three cams and 2 sets of heads in this build we proved several things. The l92 are stock i just added a fast 102 intake and nw 102 tb and circle d 3800 stall with a 230 236 cam. May 16, 2012 · When I started doing camshaft packages for LS2 GTO owners who swapped to LS3/L92 heads, the profiles were considered all "wrong" compared to what the rest used. 2/LS3/L92 heads the 6. Using dual springs and solid steel valves (not the most expensive options) a set of complete heads came out to $3600 on their site. The part number listed comes with intake manifold, 90mm Electronic TB, 39# injectors, fuel rail, and gaskets. Sep 23, 2010 · The same heads that are used on the LS2. They claim on a 4" bore stroker a cathedral port is better. Ported L92 cylinder heads were tested on Precision Race Jan 30, 2008 · i honestly think you will be fine with head studs and some good mls gaskets, the l76 l92 heads do have a thinner deck but at the horsepower it shouldnt be a problem, the only other thing on those heads is the intake flows great but the exhaust port is pretty bad in % intake/exhaust for a forced induction motor. You can get a whole L92/L76 swap kit for about $2100. GenIV>GenIII Sep 24, 2015 · LS1/LS2, E-CNC 215. Head Stud kit for LS6/LS2/LS7 200,000 psi tensile strength head studs for LS6 with equal length head bolts or all LS2/LS3/LS7/L92. Aug 9, 2016 · Because of their comparatively small bores - 3. The major mods include: 224/228 114LSA +4 0. If your RX7 guys were able to get stock LS7 heads to fit a stock LS2 bore then they have found the performance bargain of the century that no performance shop (LPE, Callaway, Mallett, Katech, etc) knows about. The larger, 4. Chevrolet Performance L92 cylinder heads are production-style aluminum heads that provide great airflow and exceptional performance. Jun 7, 2018 · Upgrading L92 Cylinder Heads. With a stock . add to cart. 62x/. 065 inches and is the same block in the 08 corvette. Once again the limiting factor of L92 heads is the intake on a stock cubed LS2/LS3 and the FAST has shown it is worth nothing. 250” wide by 2. 00-inch bore, which means the L92s' large intake valves will not clear smaller bores, hence our choice for the Aug 13, 2006 · Just seen that GM Performance parts has new L92 cylinder heads for around 375 a piece complete. 65 60' on 20's Jun 17, 2010 · This. Thanks. LS3 intake requires changes to fuel line location (rear to front) and use of LS3 rails and injectors. But the peak numbers don't tell the whole Jul 8, 2012 · The LS3 heads originated on the 2007 escalade as the L92 truck head on a 4. :drinkers: Cylinder Head, L92, Aluminum, Assembled, 70cc Chamber, Chevy, LS, Each Trick Flow® GenX® 225 Cylinder Heads for GM LS2 TFS-3061T001-C02 Cylinder Head, GenX Jan 29, 2010 · C6 Tech/Performance - TFS 215s or L92/LS3 heads - 06 C6 LS2 with G6X3, ARH 1 7/8s headers, Vram CAI, ported TB, tune. 0 is such a popular swap. Tuned by Car-Tek. 590 Crane Cam (maybe the last one made) Crane roller rockers Livernois stage 3 heads on 243 cores, Cometic Sep 15, 2010 · I believe the compressed thickness on the stock LS2 gasket is . Feb 10, 2007 · My question arises because the LS2 people seem to be foaming at the mouth to bolt up L92 heads and L76 intake, which would, except for the cam, be an L76 (if in fact the L76 uses L92 heads). One even said the only way he would do the rectangle port heads is if it was a 416 build (LS3 stroker). 0!! Havent pushed any water "THANK GOD" To help answer the original question,,,the L92 heads and the LS7 heads are not exactly the same head as it seems to be referred to here. LS2 fuel connections are on the rear and LS3 is on the front. SKU: ARP-234-4317; Sep 6, 2017 · LS2 engines, due to the larger 4. 010" out of the hole from the factory. In general terms, higher-flow cylinder heads make the same horsepower with lower-boost pressure than a comparable engine combination with lower-flowing heads. The exhaust would be 1 7/8" American Racing headers with dual cats. LS1, LS6 and LS2 heads feature cathedral shaped intake ports and measure 3. Exhaust is the same rocker arm as LS2. Since the best 1/4 mile results were had with Trick Flow 225's on the 6. The stock heads can be CNC-ported for more airflow. I bought my l92 heads ported, milled for ls2 compression, springs, rockers, and new arp head bolts for 860 on eBay. 2005 Silverado SS 13. Please list your L92/L76 heads & cam combo or heads only combo here. 00-inch-orlarger bores, so a stock L92 or aftermarket 4. 065" bore. That he wasn't going to put L92 heads on a 402 and have someone disappointed. We have seen guys take stock camed LS2's/LS3/L92 heads with bolt ons and put down an avg of 20-30 HP less than guys who take stock camed LS3's with simular or same bolt ons and make 20-30HP more Feb 10, 2017 · The reason I ask, is I will be doing a DOD delete on my 09 G8 GT and using the stock LS2 cam from my GTO which will basically convert the L76 to an LS2 but with L92 heads, intake and TB. The LS3, LS7 and L92 heads feature rectangular intake ports measured at 1. The cam choice is more critical with the L92 heads because of the big intake on the 6. 005 pistons. 82 @ 96mph AEM CAI, Circle D 278mm, HD-2 shift kit, ARH LTs, MadTunesracing. Thanks in advance. 597 Jul 1, 2008 · I saw a dyno chart comparing AFR 205 heads to L92 heads that had been milled so as to match the compression ratio of the AFR heads on an LS2; the L92 heads made about 15ft-lbs less up to about 4500rpms due to the large port size. 065-inch bore of the LS3 and L92). 2L L92 featured factory rectangular-port heads. 000-inch bore design, allows it to run LS1, LS6, and LS2 cathedral port heads in addition to the newer rectangular port LS3/L92 heads. No need to switch if yours is working. 650 AI's 267cc port $995 Advanced Induction - 267cc GM 823 Package 249/217 @ . 600 - 356/222 @ . 4 RWTQ Dec 23, 2010 · The 243 heads are the old school D-port cathedral heads. Jun 17, 2007 · I am in the process of building my first LSX powerplant. Dec 25, 2011 · The fastest SS on here is running an iron block 403 at over 1xxxHP. All the L92's -all castings-are made for the L92 block from the escalade which is 4. Reply. 16intake valve) and his L92 Stage 3 (2. I've got an LS2 with the normal bolt on modifications: - headers - throttle body spacer - Vararam CAI - Dyno tune Right now I'm seeing about 382 rwhp. LS2 intake and heads on a LS3 shortblock 2. Anyone trying to get your money should be checked out BEFORE you send anything anywhere. Features include: * Manufactured from 319-T5 aluminum alloy * Aluminum performance head * Fits any LS family engine with 4. The right combination of parts will always outperform an internet poll. 588" lift Apr 2, 2008 · LS7 heads will not fit on a 4. The LS-Series family of engines has continued Chevrolet Performance's tradition of raising the power potential of the legendary small-block V-8. Jul 29, 2007 · No, You must purchase the L76 intake manifold (P/N 12590123) for the L92 heads to work on your LS2 GTO. Dec 17, 2009 · L92 heads with the L92 intake is a good swap. 030", and run a . 600 - 357/254 @ . Cylinder heads are stock,(untouched runners/chambers), L92 heads shaved down to 64cc's. 0/6. 0L based GM trucks. 12% larger. Mar 3, 2016 · Looks like they start at $2561 for Stage 2 - WCCH L92 353/246 @ . 065-inch LS7. New L92 heads are a better fit. 00 inch bore engine. I am taking a stock 05 GTO LS2, changing to L92 heads that will be ported, L76 intake and headers. The same head gasket is now used for both the LS2 and L92. started the first pull at 444hp and ended the May 6, 2008 · L92 Heads (lightly ported exhaust), Torquer 2 Cam, L76 Manifold, Yella Terra's, SLP UDP, SLP LT's, Borla Catback, Volant CAI, LS7 Clutch & Flywheel, Harrop Differential Cover. 030" off of the head surface to regain stock compression. That is why adding LS3 heads to a 6. Jan 12, 2022 · For instance, you cannot install an LS3, LS9, or LS7 head on an LS1, LS6, or LS2 block (at least not without some creative deck/bore notching to clear the valves). Feb 19, 2025 · The real change once you have a LS2 block - $300 LS3 intake/injectors/rails/MAP sensor, $5-600 L92 heads,(don't forget you can sell the LS2 intake/inj/rails for about $150-200 and the LS2 243 heads for maybe 5-600?). Apr 15, 2009 · 6. Details. LS6 is also an alum block because it is based off the LS1. 0L. ] Heads & Cam Packages. 5:1, Ported L76 intake, ported 90mm Holley TB, 100mm MAF, FIC Custom injectors, Hooker LT, PYPES dual exhaust with an X pipe, 4L65e with all of the good parts inside, FTI 4000 RPM Stall, 12 bolt with 3. I don't want to spend more than $1000. 125” high by 1” wide. The larger bore gave even more clearance for the massive valves in the L92/LS3 heads. 55@97. LQ4/LQ9 are the same 6. SLP Puts Its New L92 Cylinder Head Package And The Previous SLP/AFR 225cc Heads In A Steel Cage Match For All The Marbles. 0l engine aside from the pistons. I have been debating porting my 317 heads and see if they will flow the same or more that the L92's. May 19, 2010 · The Mast heads are a nice piece and have a 12 degree angle, but I just spec'd out a set of 4 bolt Mast heads for a 4. They are rated at 180,000 psi--15 percent stronger than Grade 8 fasteners. 065-inch head gasket must be used. Feb 23, 2009 · Like others here I'm looking into adding a L92/L76 package to my LS2 and i would like to see some proven combos. 590" solid stem exhaust valves • . That would be alittle cheaper as you don't have to have the intake, rockers, and heads. 77:1. 2 Head gasket (*4. Use L92 intake and LS2 fuel rails and injectors. 350” wide by 2. Q. Mar 9, 2022 · This is a fairly involved swap, sensors to rewire and reroute, new ecu/pcm to need tuning and rebuilding the LS2 will most likely be less expensive, even if you already own the LS3. Custom camshaft,(and I'd be glad to provide my specs to someone who has an exact duplicate) - $500 total. 165" solid stem intake, and 1. I suggest having the L92 intake ported while you are at it and upgrading the rocker arm trunions with the Comp or Harland Sharp kit. Oct 6, 2010 · Ported l92 heads on a 364cube ls2 only lay down an average of 8whp. The L92 vs the LS3 heads - L92 has the bigger heavier valves,(not machined vs the LS3 valves). So, if with a little VVT trickery in the Escalade can help make 400hp, could these heads on the non-VVT LS2s make them LS7 equals (with cam & other little additions)? C6 Tech/Performance - Need a dyno sheet for L92 heads, LS2 and big cam like G5x3 - Heads are my next mod. 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