L92 heads for boost 50 60ft on stock rear end and shafts/suspension,on drag radials. so what would be the max boost and power i could go Mar 11, 2010 · If you already have a fast made for the cathedral ported 243 heads then yes, it'd probably be more economical (if only doing a mild street build) to stick with the LS2 heads. The L92 heads flow stupid amount of air as cast (300 CFM's) their decks are kind of thin for high boost situations. 5 heads would work really well. Also cheaper and less work than turning a 5. 5:1 VS. 2L cylinder heads, this service is The stage 2 LS3-B supercharged camshaft is a great mid duration camshaft for power applications from 2400rpm+. LS9 ZR1 heads share the LS3/L76/L92 casting, they do great with boost. Apr 19, 2011 · You could have your stock heads worked over by Advanced Inductions. Apr 13, 2010 · The same vendor will have 243 and 799 molds. 0 Engine | FlowTech Custom Blower Cam | Full 3" Custom Stainless Exhaust Bassani X-Pipe | Bassani Race Mufflers | Bassani 4" Exhaust Tips | LC-1 Wideband May 1, 2009 · The "rectangular"-port L92 head is patterned after the LS7 head but unfortunately also suffers from the same exhaust-flow deficiency. 9 1. 0L based GM trucks. Please verify reluctor ring tooth count, bore size and cylinder head volume to ensure proper kit selection. ive been told to mill them 30mills to get the same compression as my stock ls2 heads. It all depends on what you're wanting to do. 588 114LSA 112ICL. 2-liter truck engines with the L92 head, but used castings are not uncommon or unreasonably expensive. LPE’s LS9 heads cost $1,489 fully assembled with factory titanium intake valves and sodium-filled exhaust valves, Comp Cams 918 springs, and titanium retainers and locks. So you might just want to keep the lsa head after all. Also, the head has the same chamber volume as the LS3/L92 head at 68cc. Nov 12, 2009 · Precision Turbo Twin 62mm T4 Turbos | Forged 6. For valvesprings I went with Patriot Extreme Dual valvesprings up to . If you swap to a bigger cam, you'll need better valve springs and hardened pushrods regardless of what heads you use. 0L heads already outflow the CNC-ported L92 heads, and the L92 stock exhaust ports are supposed to be better than the stock 6. Oct 8, 2007 · short block. 06. ) can use any head except the LS7 and C5R, while the 7. Nov 22, 2013 · Boost is a compressive load resulting from a direct pressure down on the piston only. Sep 14, 2010 · If you like towing big loads at low rpm, then for low elevation use an LQ4, at high elevation use an LQ9, or better yet, put #243 or #799 heads on the LQ4. or a pt76 or 88 with a blow threw setup. I figured I would pass along a few things that are apparent already and maybe i dont think boost pressure has much to do with the limit of the head gaskets. This is 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. Both the Monster and Boost Monster fit all standard equipment such as valve covers, headers, LS3 Intakes, and OEM-type LS3 rocker arms. 0-liter LS7 and C5R blocks can use any LS-series head. 2002 WS6 TA, 408, L92 heads, Holley Modular High Ram, 120# injectors, Fast 92mm tb, 9. 823 vs Nov 17, 2014 · We spent a day at SME last week testing a variety of 75mm turbo combinations. 040 head gasket thickness is usually safe Just got to measure for push rods as well---danfigg mods: custom built twins, built 408 w/l92 stock GM heads,GM matching intake,drag bags,frame ties,aluminum drive shaft, performabuilt 4l80e,Yank converter,ohios fastest and quickest 04-06 GTO 9. 3 into a 5. This camshaft is designed to make big power gains on boost LS3, LSA, and L92 applications. Head bolts are 12 mm as opposed to 11 mm for everyone else. chevrolet performance gen v lt1 19 hours ago · Chevrolet Performance L92 Cylinder Heads. CNC ported right from the factory, the LS7 heads offered 773 hp on this RHS-block stroker. What are the differences between L92/LS3 and LS2 style heads? A. 2 points of decrease on the compression side of things. If you want to add boost, like turbocharging, then go LQ4. the 6. Dec 6, 2012 · L92 heads (a. With the success of the L92 heads, GM began installing them on engines across the car and truck lines, most notably in the C6 Corvette and fifth-gen Camaro. pl4yboy. 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! 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. Aug 13, 2007 · Both of sets of the higher powered heads are even cut about . This package combines a high-performance camshaft and premium heads to maximize power output while maintaining streetability, making it perfect for enthusiasts looking to unlock the full potential of their LS3 engine. Nov 9, 2009 · OP, if you do go the 317 route, it uses the same exact valvetrain as the 243. I finally bought a set of brand new LSA heads from a buddy with LS3 intake valves and LSA exhaust valves. I'm aiming for 400ish HP with good low end torque, something sporty but not crazy. 0L iron block and L92 heads. Sorry if I read it the wrong way. 700 lift. I figured I would pass along a few things that are apparent already and maybe Jun 1, 2008 · Engine building tip: The L92 heads only work on engines with 4. The numbers are just a GM system for when the mold was made. The all new PRC aftermarket casting LS3 heads are the perfect option for customers looking for the ultimate in LS3/L99/L92 cylinder head technology The 13-degree valve angle will allow for the ability to run more compression and larger camshafts thanks to additional piston-to-valve clearance!! Transform your GM LS3/L92 cylinder heads into high-performance powerhouses with our professional porting service. Dec 31, 2008 · Official L92/L76 and LS3 Heads/Intake FAQ and Information - L92/L76 and LS3 FAQ. See All 19 Photos. 2L LS truck engine. Jul 24, 2024 · LS2 Engines: Can use LS1, LS6, LS2 cathedral port heads, and LS3/L92 rectangular port heads due to their larger 4. It was upgraded with Flex Fuel capability. These are close to the same as LS7 heads. 0L we made 550 hp for under $4,900 May 17, 2017 · I've been doing a ton of research regarding the L92 heads on the LQ4. Sep 24, 2010 · According to the company, the CNC porting procedure took the already impressive L92 heads from 315 cfm at 0. Jun 11, 2018 · The higher backpressure worked with the boost pressure to open the wastegate at a slightly lower boost level with the LS3 heads than with the 317s. They are no different than a 799/243/806/823 castings. Right now I have a pretty radical SBC (Duration 282/290, Lift . Identifying an LS7 head versus the LS3, LS9, and L92 heads is fairly easy. Texas Speed used to sell a HIP'd cathedral port "boost specific brodix cylinder heads - ls7 - sts br7 - 273cc - cnc ported - 72cc chamber - 6 bolt - assembled - 1178101 . These upgrades include cylinder head bolts, or most often, head studs, along with main stud bolts for additional clamping force to keep the rotating assembly from walking around. net and used turbos and superchargers go up for sale all the time. I currently have a 402, and l92 heads. 7. Jun 1, 2010 · You have several choices with the L92 head. 1. 02 L92. 5:1 compression with Ross Pistons, built 4L80E with T-Brake, Circle D 4C Billet 245mm stall, Moser 9" with 3. Jun 8, 2016 · In fact, even the later heads don’t all have matching port shapes—the LS7 head ports have a more square design, while the LS3/L92-style ports are taller and narrower. Mar 30, 2017 · However, the larger 4. Jul 1, 2010 · Stenod Performance always upgrades customers’ engines once they exceed the 600 rear-wheel horsepower mark. The stock heads can be CNC-ported for more airflow. The only "thick deck" factory heads are the LSA. Reviews. Since building an engine from scratch it would make more sense to go with the new L92 heads GM just came out with,,they are cheap cheap cheap and flow 330 cfm right out of the box. 38 60" 19lbs no times with custom 6766 turbos with the APS kit Mar 31, 2023 · But I think if you did a fire ring, top fuel hoop, whatever the name you want to go with where you use a solid steel ring, and a groove in the head + block (pinch the copper gasket into the groove) the LSA head will handle it. Jan 19, 2011 · As a side note the SBF engines that come with 1/2" head studs are making more than 2000 horsepower with 40 pounds of boost. Jan 28, 2013 · Subbed for future details. Square your tune up and let it eat. A 4-Corner Steam Kit is another smart upgrade. A wide range of runner and chamber volumes are available. Sep 24, 2015 · This combination of optimal runner design and larger chambers makes the “035” head (aka “317”) the best of the OEMs for boost. head gaskets will only net you about 0. Jul 29, 2007 · C6 Tech/Performance - GM 821 casting heads vs 823/L92 - Anyone have any tech info on the differences in the new 821 casting compared to the 823/L92 casting? Is there a part number for the GM catalog yet on the new 821's? The 821's for those that dont know, are the LS3 heads. Dec 7, 2008 · Roots blower by Magnacharger 469 hp 498 torque on Mustang dyno 12 lbs of boost New Ride is 82 malibu wagon with 6. Jun 22, 2021 · Much like the LS3 head test run on the 468 stroker, this LS7 head test on the larger 495 stroker showed just how well the stock heads work. Q. Sep 1, 2017 · 863 ZL1/CTS-V LSA heads - thicker deck for boost - XXcc. LS7 engines feature a standard bore size of 4. 0 head gaskets. either way i think it is the same amount of work for the head gaskets. Share Trending Monster’s crazy cousin “Boost Monster” is now available for power adders. So far, I'm planning on the L92 heads, LS3 intake, possibly changing to flat top pistons for a compression bump and probably a custom grind cam. The plan was to over build Mar 18, 2014 · The heads in question (5364) heads also came on the Gen IV truck 6. Jun 13, 2012 · This wasent my original build really wanted a billet internal lsx427/Marcella intake tfs 6 bolts heads , with either fast or bs3 engine management , Life changed and the original build is still possible but the time frame it will take is not going to work for me . 3’s hp with boost and OEM hardware. I want to install a set of ls3 heads and intake on my ls2 with a new tune. The heads are the 317 for both motors. They drop right onto a 6. Show Printable Version; 04-09-2011 #1. 250 inches wide x 2. They are also 12 degree heads. The key to the power boost is the Hot Cam’s 0. The earlier lq4 has a different crank on it that caused issued when mounted to earlier A4 and M6 trannys. 550 inches tall, while the intake ports on the LS7 head are 1. Backed by extensive R&D on the flow bench and engine dyno, our ported heads deliver exceptional airflow and proven performance gains. A flat top in the LQ9 10:1. Features include: * Manufactured from 319-T5 aluminum alloy * Aluminum performance head * Fits any LS family engine with 4. For folks that can't swing a couple of grand on an LSX block, the iron 6. I am using 243 64cc heads from a 01 Z06 vette in place of the 317 and the LS6 intake. 1-0. add to cart . Jun 6, 2018 · The higher backpressure worked with the boost pressure to open the wastegate at a slightly lower boost level with the LS3 heads than with the 317s. The Texas Speed 370ci LQ9 is set-up with Wiseco -25cc pistons with ceramic tops. Or you can make it all happier with boost and not have to rev that high. 2L variants): Can use any head except LS7 rectangular-port heads; LS7 Engines: Can use any LS-series head, but smaller heads are not recommended for performance Ported LS3/L92 Heads & Cam Package. Lq9 ran the 317 heads while earlier lq4s were iron and some were alluminum heads. 2 liter L92's are way more expensive and not as plentiful. It’s not nearly as hard on parts as RPM. The LS7 is of course the 427 06+ Z06 motor. Case closed. These L92 heads are superior to stock LS1 and LS6 heads right out of the box, though not quite as race-ready as the LSx-Dr or LS7 heads. They just need a little work on the exhaust side for Lingenfelter offers a CNC ported version of the L92/LS3 aluminum cylinder head used on 2008 production 6. 600) to an even more impressive 371 cfm. Most were very close in HP #'s, and the L92 head performed well. 65 60' on 20's Sep 23, 2014 · The hi ram does better in the higher RPMs, Holley claims 7000-8000. 31 gear 4200LB Tuned by Nola High Performance LLC. Just my $. Jun 7, 2018 · Upgrading L92 Cylinder Heads. I would like to try and make it safe low maint driver. The L92 cylinder heads are similar to the LS3 heads except they used a heavier solid stem intake valve. Aug 18, 2010 · if your planning on doing some work and not a "drop in" I'd do a LQ4 with L92 heads, a cam, and a good tune. Transform your GM LS3/L92 cylinder heads into high-performance powerhouses with our professional porting service. CompCams 224/230 . This camshaft is an ideal choice for max-effort turbocharged LS3 engines running 15+ psi of boost! Designed for LS3 M6 cars or automatic cars with 2800 RPM or larger stall torque converters, and the VVT/AFM delete kit (if applicable). If the L92/LS3 can live under the big boost and heavy boot Apr 7, 2013 · For what you want if i had to pick between the two i would go the l92 route, aftermarket heads would be the best choice. Sep 22, 2014 · Dang. This camshaft is a perfect option for customers wanting a great all-around camshaft for supercharged LS3/LSA engines! Jun 20, 2014 · 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. There are many Aftermarket Heads available. our heads) flow huge numbers and have massive potential. 59" Exhaust Valves, TSP Dual Valve Spring Kit with PAC Racing Springs & Titanium Retainers - Good to . I really want to use some tfs as cast 220s or as cast dart pro1. The stock block and crank are good for 1000HP when prepped right. I'd really like to throw my stock L92 heads + a cam TBD on my LS2 (plan on going turbo), but I can't afford to turbo right now, and I'm afraid it'll feel like a dog without boost due to the compression drop (Stock LS2 being 10. And 500hp out of a mild cam, stock L92s aint gonna happen with an Lq4. It was commonly known as the Vortec 6200. Thanks to Bob and Mr. 008- . Can anyone confirm? L92 and LY6 have 70cc chambers. You'll also need a LS3 or L76 or FAST 102 intake manifold. Or you could get some LSA heads which are l92 port heads, they have a thicker deck so you will have better gasket sealing. It's the block of choice for those who want durability (I know of a few making well over 1000hp on spray/boost) and those L92 heads are an excellent choice for the money. The L94 was introduced in 2010. Apr 13, 2012 · OK. doing l92 heads and been thinking either uping the comp to like 9. 00-inch LS2 and the 4. If you get a chance, look into reading the LS head shootout that I believe Car Craft magazine did (actually, most mags have done some type of shootout with the LS heads). the l92/l76 h/i combo have had great results but i have heard some people complain about it being a mix and match parts headache Jul 30, 2012 · Completely different intake is used on L92/LS3 heads. The L92 heads have a 15 degree valve angle, and can fit valve springs with an up to 1. a. Lightweight hollow stem LS3 valves will drop right in. 520/. I have to say I like them a lot, specially for the price. 000 in. The L9H cylinder heads are similar to the LS3 heads except they used a heavier solid stem intake valve. k. 0 I have good internals with cometic head gaskets and custom grind cam. The casting number was posted by LG Dec 24, 2008 · It comes in caddilac escalades It will have L92 heads. The L9H replaced the L92 in 2009. News. 012 out of the hole because if you go to thin with the head gasket, the pistons will hit the heads . That’s less lift on the intake side than the LS3 cam, but considerably more duration, allowing the valves to stay open longer to draw in more air from the rectangular-port L92-style heads. How much boost is safe Dec 26, 2019 · We also liked the fact that the cam test on the 5. We recommend this camshaft for LS3, LSA, or LS2 engines using L92/LS3 rectangle port cylinder heads! Feb 10, 2017 · As far as head gasket you will have to measure the piston height out of the cylinder, usually . 8 with 3. 125", kits are available in standard bore and . L92 heads are dead cheap from GM and they can flow big numbers. 0, ported and polished l92 square port heads and square port truck intake or fast intake, a big juicy custom spec cam, and boost it. 70 gears. 065-inch LS7. Buying a complete used motor will save you a lot of hassle in finding all the small parts. Seems like it's about a 50/50 split on those who are for them and those that aren't. I am getting ready to finish assembly on my 6. A little more expensive would be the LS9 Titanium intake valves. If you just want to race between stoplights, then start with the L92. 005" and . I was curious to see if the more material talk was true and just how much more material was 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. ***EDIT*** same size combustion chamber for LS3/L92 As we have come to expect of the LS3/L92 heads, the exhaust flow lagged behind the intake significantly at 226 cfm. Magazine articles, for what they're worth, put that combo around 500hp. CNC LS9 heads, Built 4L80e, FTI triple disc 3200 stall, ID1300, duel Walbro 450 pumps 8. My vote sell the 317's buy some LSA's have them cnc'd and be done with it. 2005 Silverado SS 13. View Profile View Forum Posts Aug 23, 2011 · C6 Tech/Performance - Upgrading ls2 with ls3 heads - Have a couple questions about my new project. 0 liter, esp. Below is the dyno graphs from a budget 416 (4" cranked L92 block). Not much of a change at all. Aug 3, 2022 · 823 vs 821 heads. If you go with L92/LS3 heads, you'll need to use L92/LS3 head gaskets. You'll need heads bolts for pre-04 gen III engines (later engines stop using the longest bolts) You'll need an LS3 intake to get your desired lower profile intake. 030" oversize. $4,885. There is an almost endless list of possibilities when it comes to boost-friendly cylinder heads for LS engines. 40 inches tall. Drivetrain loss sucks in trucks, to top it off the L92 heads need to breath to shine Stock 243s or PRC 2. The LS7 cylinder head was offered in 2007–2009 Corvette Z06 models. Sep 21, 2015 · These heads require a 4-inch- or-larger bore and ARP head studs, but are machined to except an LS3 or L92 intake manifold. 82 @ 96mph AEM CAI, Circle D 278mm, HD-2 shift kit, ARH LTs, MadTunesracing. L94. 0 ly6 and ported l92 heads, comp cam, holley hi Apr 16, 2009 · 403 Iron motor. Mar 7, 2013 · Well everyone always talks about the LSA head having more material and being better for boost. 65 60' on 20's Boost your LS3 engine’s performance with this expertly engineered Heads and Cam Power Package, designed to deliver 560-580 horsepower. Heads & Cam Packages. Precision Race Components L92/LS3 64-72cc Stage 2. It was the first 6. Mr. Check in here, this is where we are trying to keep all the central L92/LS3/etc information. The larger bore gave even more clearance for the massive valves in the L92/LS3 heads. The big difference is that the SBF deals use a block and heads designed for the 1/2" studs. L92 heads are a cheap option as well. Crazy levels of boost? LS2/243 heads (L92 heads are thinner in some areas, but are good for moderate ((~15 PSI)) of boost) Jan 9, 2011 · I haven't purchased the heads yet for my new LQ9, but before I do, I wanted to get some different opinions/input around the appropriate static compression that I should run. 660 lift which are offered in a kit,$270ish when I bought them a little over a year ago. The L92 has less low-rpm torque than the LQ9. Their ls3 dyno mule (that is out of steve's personal truck) has pistons and rods in a stock block, with stock untouched ls3 heads and stock ls3 intake and TB. That sounds good. 4? with the L92 heads). 29″ base diameter. May 11, 2007 · Testing The New GM L92 Cylinder Heads - 550 hp for Under $4,900. bore or larger Mar 19, 2010 · It is said to improve the flow under boost, but some are questioning it's effectiveness in non boosted applications. 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. Nov 2, 2011 · I'm with Bob on the 6. Beat this! With a cam and head swap with pump gas on a Gen III 6. 350 inches wide x 2. It uses the L92 style heads. 9, vs. Fuse Performance fuel feed (Custom E55 Blend) New Best with LG turbos 9. May 22, 2013 · Get an lq9 6. Engines equipped with these heads include the LS3, L92, L99, and LY6. 2L L92 featured factory rectangular-port heads. 0- and 6. I intend to install a cam at a later date but dont want to Apr 7, 2011 · 05 lq4 has the same heads crank and rods just different pistons. Installation of the ported heads from Brodix and LPE pushed the peak numbers near 800 hp, with gains as high as 31 hp. A complete LQ9 is the easiest way to go. Oct 26, 2016 · I've taken my L92 heads and factory LS3 intake to 28lbs on MANY occasions. 9 CR. With a dyno-tested increase of 25+ horsepower over stock 6. These heads have basically the same build but different spring and valve technology. 0 with the 4 inch bore. com street tune (MTR now has a Dynojet 248 chassis dyno) Jan 12, 2022 · The intake ports on the head used for the LS3, LS9, and L92 are 1. Yet if you tried to do this with nice heads/cam and RPM it will eat itself alive. If you have good springs and don't hit the pistons the LS3 valves are a great choice. The heads flow better and have thicker decks to maintain head gasket seal. L9H. Dec 16, 2008 · C5 Forced Induction/Nitrous - l92 heads and high boost - I am curious to see who all is running the l92's and 15+ lbs of boost with good luck. Boost range is from 6-14psi on pump gas with and ECS alky kit. Another issue is the tranny. I've been debating using my ported 317 on my 408 built for big boost. My understanding is that they provide superior flow vs the stock LS2 heads, even though the are "as cast". I totally forgot that the LS3 heads I think have a tighter combustion chamber, can't quite remember. 165" Intake Valves and 1. 2L and 6. I should only have around 625 total in the heads vs the 900 for the L92. 2L cylinder heads, this service is Feb 24, 2025 · Intake Port Volume: 281cc Exhaust Port Volume: 98cc Our 281CC LS3 / L92 / L99 / LSA head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges as well. Our testing has shown over 30 hp increase while improving torque below the curve. 0L versions. The cam I selected is what I think to be middle of the road and should work pretty good. Aug 27, 2012 · That’s not too far behind the LS7 heads, but for a whole lot less money. 77 and running 200 shot. I've seen people post up very good numbers with AI CNC stock heads(40+ rwhp). 52 at 144mph. 065-inch head gasket must be used. I have been spraying 150-200 HP on the car for 2 years and love how the heads act, expecially for the price. Apr 21, 2011 · L92 boost tuning? Results 1 to 13 of 13 Thread: L92 boost tuning? Thread Tools. 2L based Chevrolet Corvettes and various 2007-2008 L92 L76 6. Also keeps your compression some what boost friendly. The Boost Monster features CHE mag-bronze valve guides and Inconel exhaust valves for the increased heat. So either angle milling or flat milling will be required to maintain the LS2's 10. 39@149 1. 500-600 n/a hp is hard to come by, but not impossible. 5 Cylinder Heads Fully CNC Ported & Assembled With Factory GM 2. The LS7 Exhaust valves are sodium filled. 000-inch bore; LS3 Engines (6. Jan 23, 2007 · i've heard about alot of good results using the stock ls2 long block and FI. It doesnt like boost too much because of the thin cylinder walls. I paid 350 for the pair of heads. I also want to have the heads milled/shaved to boost compression a bit and get a torque cam similar to the "HD Tow Stick" or the "Ultra Torque" by Vinci. 590˝ exhaust valves. Buyer's Guide. They are rectangular port and flow somewhere in the 320cfm stock i believe. The cylinder head ports and chambers are carefully redesigned to produce the best flow characteristics that will provide improved horsepower & torque. 660" Lift. 165˝ intake valves and 1. Feb 4, 2013 · So, I'm going to keep my 317 heads and have the exhaust ports enlarged (ported) and have the intake ports matched to the manifold for better flow. The valves and springs on an 821 are a little lighter than an 823, as much as 19g. 0 07+ (LY6), so you should have no problems getting them to fit. But the peak numbers don't tell the whole Nov 12, 2009 · The exhaust flow numbers on the WCRCH-ported 6. Videos But, other than big boost applications, there's no Mar 26, 2023 · I had a set of LSA heads recently redone with LS3 intake valves, LY6 Inconnel exhaust, and full CNC port to see how they will do in a turbo setup. now 13psi is 700rwhp, good heads it may only take 11psi to get to 700rwhp. The L92 was introduced in 2007 for GM luxury pickups and SUVs. 060" oversizes. See All 18 Photos Share LS3/L92/L99 and LS9 engines feature a standard bore size of 4. Jan 3, 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. 035 . Check the classifieds on ls1tech or performancetrucks. the 10. 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. Flow numbers can be as high as 373 cfm at . Mar 17, 2013 · So along with the small(est) bore making them arguably the most boost friendly of the series. X machined the first 243 heads himself at GM Research. Jun 7, 2017 · As no surprise, porting a set of L92s can yield airflow figures of 370 cfm, right on par with the LS7 heads. The 6. The L9H was also known as the Vortec 6200. 5 degree valve angle for even more power. . This might matter if you’re trying to shave off additional weight for racing performance, but won’t make much difference to the typical road user. Mar 3, 2009 · The L92/L76/LS3 heads will jump you up to a 70cc chamber, which would help your compression on high boost. You will need a lash cap with that valve. 525-inch lift on both the intake and exhaust sides, along with 219-degree/228-degree duration specs. 700 lift (327 cfm at 0. Chevrolet Performance L92 cylinder heads are production-style aluminum heads that provide great airflow and exceptional performance. 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. 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, 2007 · Read about gaining horsepower from an LS2 using the L92 Heads from GM High Tech Perfromance Magazine. 00-inch-orlarger bores, so a stock L92 or aftermarket 4. X. i'm not sure how true it is but i've read that the stock cam is excellent for a turbo. These heads are no longer in production, replaced on 6. 823/5364/2716 L92 heads - 68cc. Because they needed to be compatible with E85 fuel, GM upgraded materials with SIL-1 nitride intake valves and Brico 3010 valve seats standard. Nov 6, 2014 · I've read about the L92 head, they seem to be a better budget choice than budget aftermarket heads. (unless your talking about abnormal amounts of boost) This is why you can triple a 5. It was available until 2013. 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. 065", kits are available in standard bore, . 700whp is a joke for a good running L92 motor. The only difference between the heads is production variance. Some go from a 15 degree to a 13. Boosting is your best bet. First the LS3 is not a sodium filled valve. Jan 21, 2010 · l92 heads Jump to Latest Follow 1K views 1 reply 2 participants last post by Left Coast '32 Jan 21, 2010 Sep 25, 2012 · The LQ4 comes with a dished piston 9. Jan 30, 2008 · prepared to change heads to a thicker deck as my the findings have told me the while the l92 head is a nice piece of gear it does not have a thick deck for boost - maybe i can use the l92 head if someone can tell me how much boost it will take before the deck problem occurs-so just the basic's if anyone can help Jun 6, 2014 · Its a street car with twin 60 mm precision turbos. It is a hollow stem valve. 2-liter engines (LS3, L92, etc. All in all the block it's self is the same from what I could find. 0's are a great alternative. 540) and the move would be for more driveability rather than more power. Mar 14, 2019 · Upgrading L9H Cylinder Heads. The LSA and LS9 heads weigh 2lbs more each than production LS3/L92 heads due to better grade aluminum, being rotocast (shaken while molten), and additional ribbing in the rocker arm areas. I have l92 heads combo will be on e-85. If a head had a problem it helps them track down where the problem started. 581/. You'd need a big cam, some real head work, 1 7/8" headers to make a "hp" goal like that. 025" and running stock MLS 7. Aug 13, 2007 · C5 Forced Induction/Nitrous - L92/LS3 heads and boost results - I have been playing with the new GM heads in various configuration from N/A to Boosted and everything in the middle. 3L was run with ported cathedral-port heads, while this 6. i would change the rod bolts out and thats it till i get more money up for pistons and rods. 13@108. No sense in using stock heads when CNC ported heads are available everywhere, just choose your flavor. zkfq wjhgx bqs oiz cjsz sltbff wql btpxdkgw pauwi chvcox skxbefm msxsi pcqknbr yvgd jkwwo