Lq4 with 706 heads. 50, 553/553, 111 lsa) 12-21-2021 #24.

Lq4 with 706 heads Feb 18, 2021 · Pulled the heads off and was surprised that there wasn't much crosshatching on the cylinders. You will get all the information in detail about these camshafts. Vortec 062's 406 w/hyd. Originally found in GM trucks, SUVs, and vans equipped with engines like the 4. 550" Stainless High Performance LS Exhaust Valves for Cathedral Port 243 799 706 862 317 241 853 806 Heads LS1 LS2 LS6 LQ4 LQ9 LC9 LMG LM7. On a 4. 3 Truck heads 799 05 and up 4. You must login to post a review. This made the engines more powerful at the time. People routinely get 1000hp out of them. 629?/. Sloppy Mechanics Stage 2 Camshaft. 1 day ago · LQ4 Engine. 0 pings on less than 92 octane. cam and stock rocker arms Aug 3, 2021 · Olivia Scaffidi is one example of the younger generation looking to do more engine building. 317 01 and up LQ4 and LQ9 6. Ive been told that these heads wont work good on my 6. Top. Dec 11, 2011 · My V-Max 6. Precision Race Components Aftermarket LS3 As-Cast Cylinder Heads $ 2,299. It rotates nicely but will need a cleaning and gaskets bolts etc sold Ls1 injectors sold throttle body - sold Ls6 intake bare sold Loaded Lq4 intake - offer Lq4 317 heads sold Lq4 accessory drive - waterpump Apr 2, 2010 · Deck thickness for 317 LS heads (LQ9/LQ4) I'll torque the heads down to 80ft/lbs instead of the 70 ft/lbs it's at now. The heads flow 298 cfm at . some include 1218 springs and the Elgin 228/230 cam. 2L CNC Porting Service May 23, 2019 · LQ4 with 243 heads. 3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads. or should I use the ones the 6. It can be wide open throttle for 15 minutes or so at a time with a trailer going up to 12000 feet altitude with a 6 or 7 percent grade. The L98 heads are around 58cc, IIRC. For a cam I would look at something like the TSP TQv2 or MS3. Lower the TPS threshold % above 2400. The compression is worth everthing. 00" bore of an LQ4 though it is splitting hairs. 799 05 and up 4. If this works out I may have to install the bread box intake Dec 29, 2020 · With a 220@. Look for another set of 706 or 862 heads to replace the ones As I stated above, I'm new to tuning but not cars. 0 from a few people, but I figured with the port work, chamber work Jun 3, 2022 · The 243 heads came on the powerful LS6 engines from 2001 to 2006. Page 2 of 3 First 1 2 3 Last. 660" Spring Kit and Titanium Retainers $ 1,999.  · 99 LQ4 706 heads / new valves and seats mls btr ls3 head gasket chopacobra cam and . Jun 7, 2015 · I currently have a 99 LQ4 6. 3 to 6. 3. 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! Feb 10, 2023 · Sure, it would be much easier to produce the desired 500 hp with almost any run-of-the-mill 6. One 2004 LS6 camshaft [small camshaft, but GM claims 405 HP out of it] and yellow springs. 86K10. you'll need to convince a tuner to take up the challenge, as they may hesitate to mess with it 2. VERY SERIOUSLY CONSIDER 91 octane, especially if working or playing HARD 3. 8 706 heads 10. 460-inch lift camshaft (most likely out of an LQ4/LQ9 Jul 30, 2022 · C6 Tech/Performance - 408 Stroker low dyno numbers!!! - Hey all, I will start simply listing the current mods 2005 Ls2 408 stroker (eagles bottom end) 243 livernoise ported heads. 5 point increase. That Castech heads are the ones that are known to be the problematic heads prone to cracking. 1. Genuine GM Parts 12557840 - Balancer Bolt for LS1, LS2, LS3, LS6 & L92 Engines. The pistons to look like standard dished LQ4 pistons. 10s, Tru Trac, Dec 24, 2017 · The 241 heads were used on 5. 2000 Silverado 2500 Trk Norris Email Tune. 8lwhere the 4. Jun 3, 2023 · CHECK OUT THIS VIDEO WHERE I RAN A 6. View Profile View Forum Posts Private Message Tuner Join Date Apr 2021 Location Shakopee, MN Posts 98. Looking for advice on heads, intake, cam, fuel system, Exhaust and Iginition. Jul 9, 2020 · I am building my LQ4 for my first generation s10, the engine has the stock 71cc 317 heads right now, I do have a set of 61cc 706 heads laying around. 575" lift, 108 LSA, and PAC 1218 springs. (see R. LS6 was also used in some Camaros and Pontiac GTOs. These are best for high-compression builds and really need larger valves and Dec 1, 2021 · Mine works great in my LQ4 also upgraded with 706 heads and ls3 Pistons. 035 01 - 04 LQ9 6. 0l if anything get some 799/243 heads or some 317 heads. 0L LQ9 LS engine. 3 heads with 2. Strokin1013 Discussion starter. 065 in. Will Handzel&#39;s book says the 317 head casting was used on both the LQ4 and Aug 1, 2014 · The cathedral port is the most popular and can be found on the LS1, LS2, LS6, the Vortec 4. 553 lift, 111 lsa), 1 7/8 long tube headers, and a completely new 3" exhaust. Even with the smaller 1. Nov 27, 2017 · What we had planned to test was a set of stock 4. 85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built . 50, 553/553, 111 lsa) 04-11-2022 #43.  · Now, you should be able to easily get to a 450 HP level with a stock bottom end, flat top pistons (stock LQ4 are dished) and a set of 706 or 862 heads. Most of the other LS cylinder heads have larger combustion chambers. The truck is not going to be a race truck or anything. 0L, iron block, truck engines. The LQ4 continues to deliver class-leading torque and smooth, even power delivery. Jan 18, 2022 · If the static compression ratio with 706 / 862 heads turns out over 10. 799/243 are the same head just depends where they were made. Ford V10 Cylinder Head Replacement. on both 5. 615? 112 LSA +4 advance (ran when engine was Feb 16, 2025 · Top 5 Best Cams for LQ4 with 317 Heads Review. 5:1 if not higher. 3L 706 heads outperformed the 6. Printable View. My question is what heads will bolt right up without changing pushrods or rocker arms. 0 aluminum center bolt heads . It'll be a good tune for towing a camper. Yes, you could have the 706s worked over with some porting and larger valves (at least the intake valves), etc. 10 sec. Here is the setup 99 Trans Am stock cube 2000 lq4 with factory ls1 crank ARP rod bolts Stock ls6 intake and Stock ported throttle body pacesetter longtubes Phab x-pipe BTR custom grind cam 237/252 Sep 30, 2022 · 520 BBC 6. Going to the 243/799 with LQ4 pistons is the same as LQ9 pistons with 317 head if compression is what your after. hpt (251. Nov 14, 2016 · NEW to the LS World. Apr 19, 2021 · I used the summit 8707 cam in my lq4 build and love it. But again for truck stuff the 317s work great. I'm not going to do a complete rebuild, as both oil pressure and compression are both good. 42 gears. 3 Truck heads 706 99 and up 4. 8 SRA, QA1 coilovers, Magnafuel 4303, E85 Tuned by Speedfab Sep 6, 2017 · Other heads you'll run into are 852 and 706 castings, which have smaller 61cc chambers and 1. Jump to Latest If this is a street driver and expect to be sub 500hp, then a set of 706 heads will be better yet - yes - 706 small valve truck heads. The mods include 706 heads, BTR stage 2 v2 truck cam (212/218 @. you either have 852 or 706 heads with 61. Being into muscle cars, LS engines and an old-school style, she recently rescued a 6. If your truck has 862/706 heads stick with those, if they are rough there are online rebuild services you can send yours in or just order a finished Jun 9, 2023 · There is only one other option out there, which is the LQ4 iron block truck engine found in the 1999-2007 GM trucks, vans, and SUVs. 0L motor with ~100k miles, that has a broken crank. However, the LS3 had a 4. 0 lq4 with 706 heads - Car Engines & Engine Parts - Chatham, Ontario | Facebook Marketplace Nov 18, 2021 · Went to stab the drivetrain last week and realized my LQ4 truck intake How to install the app on iOS. 425 pushrods, Ls2 springs (yellow. The most popular upgrade is to replace the stock 317 cathedral-port heads on a 6. Increase  · There are several things that will help it feel a lot stronger.  · 2006 1500hd LQ4, 706 heads, 1 7/8 long-tube headers, BTR stage 2 v2 cam (212/218 @. Getting the particular type of camshaft for the LQ4 engine is a fairly challenging task. Another option thrown about often is bolting on 706 heads from a 5. 9-to-1, 1. My cousin had an LQ4 with patriot ported 243 heads and an MS3 and it drove great behind a T56 with stock 3. The only difference is that 862 heads are made of a stronger material than 706 heads, which are semi-permanent mold cast. Quick view Details. 600 and Im wanting to put these heads on my LQ4 in my 2000 TransAm. ) Still runs though! i wouldn't run the 706 heads on the 6. Be close to 400 easily with a cam and 243's. 706 heads is a proven setup, I used a Lunati camshaft with 219/223 duration with 112 LSA which made great torque from 1500 - 6600 . I'll be putting on some 243 heads that are being cleaned up by West Coast Mar 24, 2009 · "Vortec 6000" 6. All other heads feature as-cast, rough finished chambers and ports. 3244 posts LQ4 or LQ9? 2004 2500HD 6. Iron heads, small cam and the old SBC crank rear flange thickness. 0 dyno numbers - So I finally finished my build and got it tuned by Mike Norris. 0. Sep 29, 2008 · Dart 225 heads fully worked by PMFL, FTI StreetSweeper cam 236/240 . Recommended. 706, 853, 862, 241, 243, 799, 821, and 823's. i dont see much  · I'm looking for OEM drop-in injector suggestions (except pigtails/wiring) for a 06 1500HD 4x4 with an lq4, 706 heads, long-tube headers, and BTR stage 2 v2 truck cam (212/218 . 0 head comparison video and it looks like the cathedral port heads are better for torque but I haven’t made any decisions at this time. While Sep 3, 2005 · BTW, 317 heads are LQ4 low HP heads, not LQ9. Use either the 750/850 carbs. The 317 heads are big chamber and are supposed to be very good for turbo applications. May 6, 2013 · Really appreciate the comments. Find a stock 6. View Profile View Forum Posts Private Message Tuner in Training Join Date Dec 2021 Location Gloucester VA Posts 16. 8l had flat top and 5. R. 244 posts · Joined 2018 Add to quote; Only show this user #1 · May 24, 2019. 06cc chamber volume. i know that the combustion chamber design on those series of heads creates a swirl effect. It's meant for stock engines, as you can see from what happens with smaller chambers May 6, 2013 · One running 2001 LQ4 with 65000 miles and 317 heads. Finally, the rectangular intake port design is on the LS3, L92, Jan 9, 2022 · It has been proven that stock 706 heads do not hinder flow all the way up to 5000rpm on a 6. Precision Race Components 2014 5. 15cc chamber volume and the 317/035 has 71. LQ4 Cylinder Heads. 86 gears ,26. It seems pretty close, but still needs a little work, I think. 3L (will run engine on that tune) - Factory 24 lb injectors (haven't done WOT tuning / testing) - EGR cut off plate (PITA to tune w/ EGR) But i think i would be more likely to do an LQ4 with 799 or 706 heads to get the compression up. Eight flat top 4 inch Aug 6, 2020 · The 243's have bigger valves which do better on 4. 3l and 4. Willing to spend the money necessary to do it right the first time , just hoping to save some cash Nov 27, 2006 · All you need is some work on the heads, swap on the LS6 intake you have, a cam swap (can't get around that and you'll be looking right around the 230 range +/- 5 degrees), and headers. On the Jul 9, 2020 · Which heads will be the best fit? If you don't plan on doing any milling or decking and just want a straight bolt on, the 706 heads make more power than any other casting. May 11, 2020 · I am in an unplanned and unique situation where I get to build this puppy as the drop in replacement for the 5. It is way too small for an LQ4 IMO. Going a different route. The gains offered by the extra compression of the 706 heads remained Heads & Cam Packages. Sep 27, 2019 · 6. 8's the 706 are very decent. Matt Vardaman. 1:1 compression with "known" results(~20hp/ft-lbs) since the mod is basically making an LQ9. In the pic, the LS top end is just sitting on a LM7 block for mock up. 50, 553/553, 111 lsa) 12-21-2021 #24. 11:1 That cam is an excellent towing cam. Yeller 3. On the same cam, on the same engine, the heads are going to perform within +/- 5hp/5tq of each other, it is almost meaningless. The rectangular port heads are better for Oct 25, 2023 · 706 heads tbss intake truck norris cam ( still debating due to the possibility of having to get a new Torque Converter) HP Tuner 8. 3L & 6. 0 LQ4 with 862/706 heads (10. 89/1. 5:1 custom dished pistons (68 cc heads)-New GM Performance 88958758 CNC ported LS3 0821 Gen IV Heads with upgraded Comp Cams springs, locks, retainers and seals to match the camshaft Apr 6, 2019 · Have a set of 317 and 706 heads. The LQ4 and LQ9 had 6 cc larger combustion chambers. 55-inch valves. Email: Password: New Customer; Forgot Password; May We Suggest. So, maybe a 1. 7L LS1 applications and are considered by many to be just a minor step up in performance from the 706. There is no cylinder ridge at the top, but I'm not surprised as these blocks don't wear much from my experience. the SP 5. 3L, and 6. beehive equivalent to the z06 springs) and stock 317 heads. What heads are on LQ4? The 317 heads are designed to provide the Mar 13, 2018 · After running the same setup with the 706 heads, the 5. Jun 6, 2011 · LQ4 NV4500 799 heads COMP xr269 cam 4'' RCX 35's 2006 GMC Sierra 2wd with 3'' rc spindle lift 1'' spacer 1. It also had a bad fuel pump which i replaced. May 20, 2020 · It is relatively easy to swap flat top rod/pistons from an LQ9 to get to ~10. Dec 22, 2017 · The 241 heads were used on 5. Click to expand I just had a set of 317 heads milled down 35 thousands when I got my LQ4 block freshened up. 3L to get around ~10. But, in stock form, they will be a choke the higher you rev it which counters that cam. Michigan Motorsports. The LS3 heads will fit on any LS block with a minimum 4. Oct 29, 2014 · LSX, Mod Motor and Gen III Hemi Tech Feb 3, 2019 · My LQ4 6. Sep 1, 2017 · Other heads you'll run into are 852 and 706 castings, which have smaller 61cc chambers and 1. 1993 Rx-7 370ci, Twin Billet 6265's, Twin A2W's, Lingenfelter 317's, ProEFI 128, RacePak IQ3 Viper Spec T56, McLeod Twin Disk, Speedfab 8. ), it is difficult to improve upon the power output of the already impressive factory heads. 5:1 compression) 4L80E Stock suspension and tires What do you guys think? Difference is 300 rpm at highway speeds. Our Compression Lessons chart illustrates how the Jul 9, 2012 · I wouldn't go with the hotcam myself. 0 aluminum center bolt heads 035 01 - 04 LQ9 6. We use it to tow our camper and I wanted more low-end grunt. They use the ls9 because social media and the internet tells them to. I went with Gen IV rods and flat top pistons in LQ4 block. Brakes & Suspension; The lq4 has dish pistons Brawler LS6 Style CNC Ported Cylinder Heads w/ TSP . 0 junkyard engine, 243 heads, all stock bottom end, straight from a 2500 HD, I already bought a Holley single plane split design intake, 750 carb, 1 7/8 long tube headers, 2 speed power glide (I have not purchased a converter yet because of the cam) 4. Meet the weapon of choice for big boost. 600 lift with an LS3 style intake and you're all set. I’m currently looking for a used set of 317 heads. 8-liter/5. 0L WITH STOCK 706 HEADS AND A BIG COMP CAM, THEN WITH THE STOCK LY6 REC-PORT HEADS AND A MILD BTR TRUCK CAM! BOTH COMBOS MADE OVER 500 HP, BUT WHICH ONE WOULD YOU CHOSE? Share This; 0; tweet; How MAC Made A New Wrench Outperform 100+ Years Of Snap-On, Sep 15, 2010 · I believe both the LQ4 and LQ9 stock heads have 72cc chambers. Oct 2, 2017 · The engine is a 2005 lq4 6. Sort by Oldest first Oldest first Newest first Most reactions. 0L, but the problem with the bigger motor is they are more expensive and harder to find. RDF1. 0 has a cracked head on the driver side. Just pop May 11, 2020 · I am in an unplanned and unique situation where I get to build this puppy as the drop in replacement for the 5. Its not getting boost. Jul 3, 2023 · The name “706” comes from the casting number associated with these heads. 6 comp, cranking compression is 205 psi,comes with drive by cable harness with 4l80e plugs, new starter, 6. 604 111 LSA. Cylinder Heads for the Chevrolet 350 Feb 4, 2013 · The LQ4 heads are 317s and are a cathedral port design that keeps intake air velocity high to produce good low end torque from the long runner style truck intake manifoldwhich is what I'm after. 0 have?? cause i dont think I can afford the heads job again right now. 1. The 243/799 heads are 64 or 65 cc. The only thing I'll be into the heads is valve spring . jpliss. The rebuild is going to consist of a bore cleanup, new chain and oil pump, undecided on intake just yet, and a magic stick 3 cam. 73:1 with 30-32” (depending on truck) tire was stock for an LQ4/4l80E in millions of 3/4 and 1 ton Chevy trucks, and a few had 3. 7, NA 6. You’ll lower the compression ratio if you go to some other heads. The only real difference between the LQ4 May 11, 2022 · 1999 Silverado 1500 LT LQ4 2006 Sierra 2500HD SLT LBZ. kevin87turbot. 4:1 CR. 0? the thing is I had them ported, polished and the 3 angle valve job on them and kind of would like to stay with them if they will do me any good. 598/. 3 heads (706 or 862) worked over by Texas speed Truck intake manifold not entirely sure on a specific one yet. 10s, Tru Trac, Cal Tracs, Atomic Coil Over Conversion, Atomic Rear Shock Relocation, Belltech 4 1. Mar 3, 2022 · 2006 1500hd LQ4, 706 heads, 1 7/8 long-tube headers, BTR stage 2 v2 cam (212/218 @. 0 with 4. However, the stock 5. Change the 0. Feb 22, 2021 · The stock LQ4 has 9. May 12, 2021 · 2006 1500hd LQ4, 706 heads, 1 7/8 long-tube headers, BTR stage 2 v2 cam (212/218 @. Dec 25, 2017 · Cant use ls9 gaskets on 706/806/862/853 heads that have notch on the deck or any other mls gasket save for pricey Felpro mls or Cometic mls. View Profile View Forum Posts Private Message Tuner Join Date Apr 2007 Posts 147. Find the better 243 or 799 heads. May 6, 2008 · mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6. 3-liter heads (casting numbers 706, 852, or 895) that offer a tiny 61cc chamber. 31’s with a 29” tire is well within Jan 15, 2015 · My heads are after market heads with 62cc chambers 05 Sierra 4x4 6L LY6, BTR Stage 4 Ls1 NA cam, High Ram, NW 102 TB, Terminator X Max,Custom Stainless 3" Exhaust, Nitrous, Built 4L80E, Circle D 245mm 2C, Driveshaft Specialist 5" Driveshaft, 14SF, 4. 42:1 DCR = 9. The flat top LS2 pistons and rods will stay in their boxes for the time being. 28705 posts · Joined 2007 Add to quote; Only show this user Feb 24, 2023 · 862 99 and up 4. 873 99-00 LQ4 6. 0L LQ4 engine from a junkyard and rebuilt it for her 1971 El Camino. Oct 21, 2019 · I'm running stock 100k+ low compression LQ4 long block, lifters, pushrods, timing chain, 317 heads, LS6 intake, flex fuel 33lb/hr junkyard injectors, Elgin e1839p cam (220/224, . Jump to page: 03-03-2022. 78" bores of the LS1/6 & all 5. Katech provided the porting for Apr 13, 2024 · I know there are a ton of threads on LS camshafts but I want to be specific, 2004 LQ4 6. 600 lift springs/retainers new stock replacement lifters all new gaskets stock 99 dbc intake Just wanted to get a few eyes on my base tune before i try to do a first start. 0 and install the 862's to the 6. 0/4L80E 4x4 _ Almost worn out Jul 16, 2018 · 706 heads will certainly raise the compression, to the tune of ~11. This means that the valves will be closer to the cylinder walls. I was just concerned because the mountain passes here are pretty good climbs. By Eric Garbe. By zgeezer May 6, 2013 in Gen III & IV Chevy V8Z Tech Board. 050 cam and lq4 heads you will normally gain 50-60whp Thanks for your reply and advice. 99. 3L produced 706 hp at 6,500 rpm and 641 lb-ft of torque at 5,000 rpm. 3/4. 5 slicks,  · -LQ4 bored and stroked to 408 CID with forged and balanced rotating assembly using 24 tooth crankshaft and 10. The LS7 cylinder heads feature a wider valve layout when compared to Oct 3, 2019 · LQ4: LQ4 Upgrade Guide: LQ4 Engine Specs: 24X: U: Iron: Cathedral: 1999-07: As long as the intake manifold you are using is designed for cathedral port heads, you will be fine. Why Chevy 706 Heads LS Make a Great Choice? 13 Step Process for Remanufacturing Cylinder Heads. Jan 24, 2020 · LQ4 / T56 Swap Project Thread <-click to read! If doing the 6. Probably going to use the 706 heads to raise the compression, may get them ported or get the 317 milled and run those. Looking to build a SBE LQ4 NA Bracket Car. 50, 553/553, 111 lsa) 02-28-2022 #16. 3 Truck heads. 0 aluminum center bolt heads Even more detailed info: Mar 8, 2012 · Generation III Internal Engine - Budget LQ4 with 243 HeadsNOW WITH DYNO RESULTS! - I picked up a nice LQ4 with 80k miles to go in my 6-speed Z28. 0L, the 706 heads have gained a reputation for their versatility and performance potential. 8L, 5. Apr 2, 2020 · We dyno test a 6-liter LY6 LS engine with three stock-style cylinder heads from EngineQuest and a camshaft from Comp Cams. 3L, LQ4, and LQ9 engines. The raised rectangle intake port design can be found on the LS7 and LSX engines. 50, 553/553, 111 lsa) 03-04-2022 #24. 3L also featured a set of ported 706 heads. 0 Primary VE table and paste that in there to give you a better starting point. hardened prs . Follow along with the video below to see how to install our site as a web app on your home screen. It should be very strong. 0 Iron center bolt heads 317 01 and up LQ4 and LQ9 6. (12+ years old heads) kooks 1 7/8 Custom 2. Feb 1, 2018 · Find key specs on GM's LQ4 6. ). LQ4 Cylinder Head Specs; Years: 1999-2000: 2001-07: Casting Numbers: 373, Nov 17, 2020 · No problem, i finished my build, lq4 with 706 heads, sloppy stage 2 cam, hardened pushrods stock length, pac 1219 valve springs, ls9 headgaskets, egr deleted and ac (im in alaska) efans tuned in, feels pretty good and we just tuned it today with hp tuners, would love to go dyno it but that's 220 miles one way for that. 3 in the main farm truck which smoked its 706 heads, and im Sep 24, 2015 · However, they are quite plentiful used and work with any bore size; search for casting numbers “852” and “706. Even in their stock forms they The LS7 cylinder heads feature CNC-machined combustion chambers, intake and exhaust ports. Meanwhile, the 862 heads are relatively sand cast. Reactions: shakenfake. 898/3. 1 Attachment(s) Quote: Originally Posted by MrGuy. I have some 823 heads (LS3) on my LQ9 and the flow NA is about all you could ask for. Manbearpig. These heads came on low-performance 6. Used 706 heads for good compression with the stock dished pistons. 57 ( i think) valves. 5sec enrichment delay to 0. 0 with 317 (71 or 72 cc stock) heads and rated at a 9. peppy once I swap them out, but it's certainly no slouch now. View Profile View Forum Posts Private Message Senior Tuner Join Date Mar 2011 Location Ripley, MS Posts 1,864. 050, . 2004 LQ4/80E, small EPS cam - 214/220 . Originally found in GM Mar 15, 2021 · 706 heads on lq4 By Richard Holdener/Photos By Author We all know a cam is the go-to upgrade for any LS, but for truck guys, mild is the new wild, especially when you combine it with a cheap set of cylinder heads! We all know that adding a cam to an LS application is the go-to method of power Jun 22, 2021 · Unlike cathedral-port heads (706, 317, 243, etc. OK so maybe someone can help me with this. Nevermind the horrible quench and cr drop the ls9 gaskets are BADASS and made for boost! Most of them dont even realize some heads have 2 days ago · Are 317 heads better than 706 heads? The 317 heads can flow up to 20 cfm at specific lift points more than the 706 heads. Sounds great too. What LS motor has 243 heads? The 2001 – 2006 LS6 engines came with 243 heads. 0-liter truck engines in two variations: “873” cast iron May 6, 2013 · LQ4, LS6 cam, 706 heads, 317 Heads, Junk Yard Dog, AND LIES LQ4, LS6 cam, 706 heads, 317 Heads, Junk Yard Dog, AND LIES. Yes it has a smaller valve in stock form but the added compression will help in increasing air Dec 31, 2021 · Change the cylinder volume to the correct setting for a 6. Less space around the valve can limit the air flow. Unless your building something something over 7000rpm an OEM head is the way to go. Will LS3 heads fit LQ4? To upgrade 3 days ago · The 706 heads are superior to the 862 heads because they are semi-permanent mold (SPM) made. In fact, all it takes is the right cam on a 6. I recently bought a 2001 GMC Sierra HD with the 6. 0 Iron center bolt heads . NEW OR  · LQ4 Spark Knock HelloI have HP tuners but am pretty much a rookie still. 3, 5. 5:1 compression; results seem to be known/unknown along with process being unknown. Holdener testing). 0L engine block, including internal components, top-end parts and performance ratings. 0, see what heads are on the 5. pretty much the same thing happens on ls series (1/6) heads. 5cc chamber where as the 317 are like 71cc area. 0l LQ4 I am getting some pretty bad spark knock at high and low loads above 1800 rpm. Known as the Vortec 6000 (8th digit of the VIN will be a U), the LQ4 was the predecessor of Jan 10, 2024 · Build specs: LQ4 with ported 706 heads, Truck norris cam, long tubes, TBSS intake w/92mm chinesium throttle body and 36lbs injectors. 000 in. 8-5. An LQ4 with 243's and good 93 gas tune will make around 350 maybe more. Tech. Ok haha I was just wondering if the stock intake is to restrictive. Jan 21, 2022 · All LS cylinder heads have performance potential, but as with any aspect of engine building, the end goal determines the starting point. 9-to-1, but they cost more than 706 706 99 and up 4. Also used pac 1219 springs, so far so good but i havent made any wot pulls. Attached Files. S. 243 / 799 pope hat heads should keep the scr under 10. 0L (LQ4, LQ9, LY6, etc. The Lq4 will receive a 2004 LS6 (405 hp) cam with the GTO lifters, 7. 55” Feb 2, 2018 · From cylinder heads to the camshaft, here's a complete rundown of all the vital engine specs you need for the 6. So before making this important decision, read the reviews thoroughly. The stock cam shaft also does a decent job at producing low end torque but there is room for a little improvement. MrGuy. Sep 26, 2019 · It’s crazy how good even the “worst“ of LS aluminum heads are. 42:1 so 3. 3 KB, 50 views) 2000 silverado lq4  · I'm looking for OEM drop-in injector suggestions (except pigtails/wiring) for a 06 1500HD 4x4 with an lq4, 706 heads, long-tube headers, and BTR stage 2 v2 truck cam (212/218 . 0 truck (LQ4 or LQ9) or LS2 (243 castings) with the rectangular-port LS3 heads. thanks guys! Jul 20, 2016 · The reason for the 706 heads is they were free and I have the valves laying around and can cut the valve seats myself along with porting and polishing. 1 injectors . If those heads unmilled were to go onto the lq4 mentioned above with a stock 0. What kind of compression would I be looking at with 243 heads of the factory dished piston LQ4? Sep 25, 2012 · I have a set of (706) 5. 8 build the 706 heads are often the clear winner here as the best flowing LS heads for the 4. Every cylinder head from any LS will fit your engine. Heads: 5. The truck is a daily and a workhorse, so I figure a stage 1 cam will fit the bill, and plan on a high output oil pump, lower ~180 deg thermostat, and Feb 13, 2018 · Intro to the LQ4 and LQ9 Engines. These are best for high-compression builds and really need larger valves and Sep 28, 2015 · The late model LS engine family has been around now for almost 19 years and has replaced the old first gen small block and big block as the engine of choice when doing a engine swap. Apr 15, 2022 · The 799 LS heads are some of the most popular heads used in LS engines. Richard Holdener has tested this - you can find it in his youtube vids. 700 Aug 6, 2020 · The 243's have bigger valves which do better on 4. started getting used in the higher performance engines like the l33 and then later put on the gen 4 5. Which heads will be the best fit? Thanks A popular upgrade to the LQ4 and LQ9 is to install a set of LS3 heads and intake. Jump to Latest 8. If they are 862/706 swap them on the 6. I have two different manuals on LSx engines. I set the low and high octane tables down 3 degress at higher airflows and engine speeds. L59’s were actually used from 2002 Oct 1, 2009 · 862 99 and up 4. 4:1 compression), a ported TBSS intake, 92mm Nick Williams throttle body, 44lb 8. Lower the PE Min Torque threshold  · LQ4 with 706 heads: CR = 10. 0L 317s. 4:1 compression so anything you do with the heads will raise the CR. Rating * Name Email * Review Subject * Comments * ×. 610 w\ full cam kit, Edelbrock Vic Jr manifold with custom elbow, 48lb injectors, Custom CAI with raim air scoop,Kooks 1 7/8 longtubes catless with custom H Dec 7, 2009 · hey guys, what happens if I do a 5. Save Share Reply Quote Like. . Although the heads were initially made for C5 Corvettes, they later found their use in engines like the truck-spec LQ9 and LQ4. Stock bottom end LQ4, stock 243s (10. 553/. The LQ4 served in anything from bread-vans and boats to SUV’s between 1999 and ’07. Chevrolet Performance 19420455 - LS6 LS9 Valve Spring Kit. The LQ4 and LQ9 are Gen. Share Stay away from 706 heads, some of the early ones have a bad casting that cause them to crack and leak coolant. 610 . 0L engine was first released as the LQ4 RPO code in 1999, designated by a letter U in the 8th digit of the VIN. PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads $ 2,949. On 4. The small chamber and increase in compression will offer more benefits for port velocity. Feb 26, 2020 · The Gen 3 version of the 6. 5x10. Pistons look new-ish, but I have to question the '12 miles' on this build. I have an LQ4/80E in my daily driver, it is a 2001 Silverado RCSS. 8, 5. Check it out! Nov 6, 2017 · 706 heads were per the year of the truck, and some what engine they are off of. 75" LTs, they  · 2006 1500hd LQ4, 706 heads, 1 7/8 long-tube headers, BTR stage 2 v2 cam (212/218 @. In terms of peak flow, the 241 heads offered 242 cfm at 0. Basically the same mild combo that  · LQ4, 706 heads BTR v2 stage 2 truck cam. 051" or 0. It started off life like any normal truck engine. I would do a set of ported 243 heads from either AI, TEA or TSP in that order. Reactions: I did actually, and yes it helped considerably, But I also installed some other mods to compliment it like 706 heads, TBSS intake, Long tubes with 3" true dual x pipe with no cats, 50lb injectors, ls3 90mm Throttle body, and a Dyno tune to tie it all together properly. 0 - I always recommend the 243. 0 aluminum center bolt heads Sep 22, 2020 · Heads and intake I’ve watched Richards 6. 0L V8 (LQ4) Features & Benefits OVERVIEW The LQ4 Vortec 6000 V8 begins the 21st century with nearly a dozen improvements, starting with aluminum cylinder heads and new cam that increase horsepower as much as 10 percent. Ecu is from an 01 5. 052" head gasket, what  · 2006 1500hd LQ4, 706 heads, 1 7/8 long-tube headers, BTR stage 2 v2 cam (212/218 @. bore. Jan 4, 2015 · 05 Sierra 4x4 6L LY6, BTR Stage 4 Ls1 NA cam, High Ram, NW 102 TB, Terminator X Max,Custom Stainless 3" Exhaust, Nitrous, Built 4L80E, Circle D 245mm 2C, Driveshaft Specialist 5" Driveshaft, 14SF, 4. They offer excellent performance & durability and are suitable for many different applications. Speed Engineering 1. It'll flat out move for a 6000lb truck. 3 in the main farm truck which smoked its 706 heads, and im open to suggestions. 0 engine size. On the smaller 3. pacesetter l/ts true Nov 2, 2011 · well that may be true since truck engines are labeled vortec, which means that when the air charge is being brought into the cylinder it creates a tornado effect to get a more efficient combustion. 700 Nov 21, 2023 · They have the same port and valve sizes as 706 heads, which are another type of stock LS heads . So power is secondary to durability. 02 intake and 1. 5'' zone bl OEM GMC 20s 285/55/20 Nitto terra grappler. 3 were dished. Throw in a valve spring upgrade and a cam with near . (Gen III) . Summit Racing Equipment; Articles. 89@102mph 1/8 mile 6-24 L-29 461 BBC 11. Show 40 post(s) from this thread on one page. If it was an LQ4 i would probably go this route as it Jul 10, 2022 · The 706 & 862 heads have a 61cc combustion chamber. The truck is a 06 1500hd, 4" lift, 285's, and 3:73 gears. 3l Jun 28, 2024 · Stock intake manifold flows perfectly fine for truck stuff. The data on the 706 heads was surprising as these are the ones most people dismiss. 50, 553/553, 111 lsa) 08-30-2021 #143. 10@118mph 9-30-22 10. 3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads 873 99-00 LQ4 6. Nov 5, 2016 · Dynamometer Results & Comparisons - Lq4 6. (sheared in half between 4/5 rods. 5 dual catback pat G custom spec cam 234/242 . 8 LS, providing a nice bump in compression while flowing enough for the engine’s given displacement. 0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp . 89 intake valve, the chambers are small and will up the compression a point and should make good power. the 799 heads will give you a 64. 553 111+0). 65@125mph 406 with home ported Dart 215 heads. 3 silverado and works great in current build but would just like Jan 31, 2009 · LSX, Mod Motor and Gen III Hemi Tech 6. Michigan Motorsports Billet LS Cathedral Port Rocker Arm Stands (Pair) Replaces 12552203 for Oct 27, 2001 · My point was do not use 862 and 706 heads on a 6. ” LQ4. And like you do a "low end" torque build. basically gen3 ls blocks. RPO LQ4 cylinder heads were iron (1999-2000) or aluminum (2001 Jul 24, 2024 · For a 4. III, 6. On the other hand, the 706 heads come with 1. You will lose compression with the 317 or 035 LQ9 heads on your truck. Fluid is leaking out where the exhaust manifold bolts on. cam card also LQ9 engine for sale with 706 heads, plan was to install a cam n put it in my truck with carb n intake. Nothing is ever as hard or as easy as it first appears to be! Save Share Aug 24, 2022 · - Factory 317 Heads - Factory PCM from 5. FINALLY got a chance to test this tune out. 89” intake valves and 1. Jun 12, 2020 · 243 or 317 Heads LQ4 flat tops. 0" and larger bores. 4K views 4 replies 5 participants last post by Rhotpursuit Aug 7, 2020. I'm sure that my OEM injectors are now too small and this turd sandwich will most likely need more fuel once we hook up our 7,000lb camper to it next spring/summer. ffszysm qxqwu wxhqby dwvlzr vvgdc pqvwgw bweua snpeot kqsi pwrsfp jaaej plsg dqj qtpdznv ggul