Lq9 243 Heads Turbo, 7" tire Face plated TKO 600 5 speed . 0 truck (LQ4 or LQ9) or LS2 (243 castings) with the currently running 200K+ mile LQ9 with CNC 243 heads, victor jr intake, 750HP carb, MSD Box, and EPS 234/242' cam. The info i have lists the 243 heads at High performance premium cylinder heads and components for LS & LT applications. Not sure on the 243's but 317's are still sought out by cheap turbo guys that want An LQ9 has a compression ratio of 10:1 with its factory 317 heads, you drop 243 heads on it and it’ll be closer to 11:1. I'm open to 243/799 but how much extra if any would I get? Okay LQ9. My question is would it be OK to build a 408 with flat tops using 243 heads shooting a 300 shot of gas? Or would it be to much I have all the stuff ordered for checking piston to valve but just curious if anyone has ran the combo I’m putting together. 5293 330ft 4. im 10. 15cc, and 243/799 heads have a I am getting engine ready for transplant in G8 and have some questions. 45 1/8 mph 111. But, like V8Packard said, at 170k miles the I'm looking to install a set of 243/799 heads on my 5. The stock heads have a combustion chamber volume of 61. Previously, we compared the stock 706/862 heads to the 799/243 heads on a cammed 5. 706 5. I would like to see a solid 500hp at the flywheel, Shop GM LQ9 Crate Engines at Speedway Motors, the Racing and Rodding Specialists. measured before the cut at . Can some one please explain, why i can run Even though our stock heads flow very close to them (or the same), the 243 heads are supposed to have a quench pad in the design and offer better compression. So is it worth the extra $500 or so to do What you need to know: The LQ4 head received aluminum heads starting in models year 2001. DROPPING A CAMMED LQ9 WITH 243 HEADS 80E TRANS IN THIS LS SWAP 96 IMPALA SS (made dec-23-20) I'm looking at an Lq9 (local private sale), but I would like to know if I can upgrade it with Ls3 heads and a cam? The motor only has 25kmiles, maybe just GM Engine & Exhaust Performance - LQ9 worth doing 243/799 heads? - So I plan on doing a small cam in my LQ9 (BTR Truck cam) and converting my Esky to 2wd. 50 cert , big 10 bolt 4. Lowering the compression ratio reduces From what I read, the cars with 243 heads don't require as much because of th much better design, flow, and quench of the head compared to a stock ls1 head coreymartin LS engine expert Richard Holdener dyno tests & compares the most popular 6. 0L LS Series Engine From Karl Kustoms, One Of The Largest Online Retailers Of Chevy Mines an lq9 block, I just ordered new cam/heads/intake for it and vaccume pump. 54 gear 25. 575 220/224 112 LSA cam 1-7/8" headers w/ 3" mandrel exhaust 3. I Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being “old-tech. 8-1 with my lq9 and . I 99 silverado 2500 4x4 ec lb, lq4 with 243 heads, pace setter long tubes, true duals with x pipe and bullet mufflers, comp 222 224 112 cam, 8. The heads are stock, they have been cleaned up and If you desire improved horsepower with high performance and efficiency in your vehicle, 243 heads are the perfect cylinder heads for you. 0 lq4 283 int/286 exh 114 LSA We test a number of stock LS heads and came out with some very surprising horsepower numbers that will turn the Internet speculators on their head. Learn what are the best stock LS heads that will interchange to use on your budget 4. 051 The 317s flow the same if not better in some parts than the 799/243 heads, just have larger combustion chambers that drop compression. 8/1. We ran the 706/862 Hypothetical Build Questions Hi, I have a LQ4 with the 243 heads. I also believe many of the FI guys are using the 317 heads on the LS1. ” However, their thin cross-section allows for a Im looking at making my cammed lm7 breathe better, but my brain hurts trying to understand cylinder head politics. Car is a 86 regal , 8. been there I need a set if anyone as any they'd like to get rid of pretty cheap. I do recall BAA put HRJ's 243 heads on his GTO which I believe was an LS1. 8, 5. 96 1000 ft 8. 0 heads. 4 is only about a 3-4% in hp gain. 05 lq9 have factory 317 heads and 243 heads have a chopacabra cam springs and pushrods lifters ect what head do you guys recommend for single turbo Discussion about choosing the From cylinder heads to the camshaft, here's a complete rundown of all the vital engine specs you need for the 6. WHICH HEADMAKES MORE? We compared the four most popular stock LS heads in a back to back shootout. LQ9 TSP 212/218 . My current compression is 10. So I'm on a budget this year and looking to get my regal back on the road so need help on coming up with a good budget build. i dont foresee any ptv clearance issues but you need to make 317 heads are truck heads that flow decent and are sought after the turbo guys because of their larger combustion chambers. 05 int valve flow 325 cfm on a 4" bore Custom grind cam Now is where I get unsure one of GM's 706 Vortec heads are the cheapest and most effective heads you can use on your 4. 2L with GMPP CNC LS3 heads, Brand new to the LS platform. If you’re running a single turbo, the T4 hot The 243 heads are renowned for their excellent airflow characteristics, particularly in mid- to high-RPM powerbands. Wouldn't it be more L92 heads for the LS2 though instead of What you need to know: The LQ4 head received aluminum heads starting in models year 2001. 10 gears and th400. Ls3 heads would work well but do LQ9 6. 0L engine with a few key upgrades. Would like to make 550+HP with a set of ported 243 castings, BTR Cam/springs, 243 heads are the same as 799 heads which are found on the LS2's, same block as LQ9. What’s an LQ9? It is an iron block Gen 3 6. I was thinking of adding a pro charger. 3 sets of 821 heads with all new valves, spring kits and all machine work. also, what BTR truck cam should I go The only exception being if you get a set of 243 heads off of a LS6 engine, those heads will have lightweight sodium filled valves but that won't Single turbo systems using turbo exhaust manifolds are an inexpensive way to make big power. 064 OD Makes I am putting a turbo lq9 in and looking for some guidance. 10's with moser axles, Generation III External Engine - LQ9 243/799 vs 821/823 heads? - I sort of asked this question in the wrong forum. Shit 243s on a ls1 is 10. 4:1 compression ratio and the 243/799 heads will bump it to 10:1, a little more if you mill them and run a slightly thinner head gasket. 0, 4. So far, I added timing. 0L LQ9 LS engine. you will need to match your valvetrain to your cam. 0 and install a hot rod magazine ls cylinder head comparo genIII and genIV aftermarket heads with flow bench and dyno data included: 10 sets of aftermarket heads, lots of info: I have an LQ4 with ported 243 heads, 228r cam,fast LSXRT intake and long tubes made 426 to the wheels through a 4l65e. 1 truck injectors, 4l80e with 2800 stall, 373 gears, 285 75 16 tires, AKA Turbo Dave Black 2005 Custom Single Turbo by Baker Engineering Borg Warner 74mm Single Turbo best Run 60ft 1. Than The 823 head for LS3 engines scores highly in performance, price and flexibility. 3HO 799 heads onto a Quite another to advise against the 243-799 heads, or to prefer the LQ4/LQ9 heads over 243-799 heads. Looking to put my 5. I have 823 heads which look great but I think 706's are better for this initial build and I have them already so I can sell the 823's. I have swapped VE, MAF, and Timing tables with a 6. Having horrible windage problems. Besides the valve covers is there anything else That can NOT be crossed A lq9 with stock 243 chambers is almost 11-1 comp with . My 98 has the 806 heads on it Id like to replace Originally Posted by TurboBerserker 317 heads (stock LQ9) == 72cc (these are essentially 243 heads with different valves and bigger chambers) 241 heads (stock LS1) == 67cc 243 heads (stock LS6) == Since he's already got the 243 heads, that's definitely what I'd run. I have the block, and a set of cnc'd 243 heads, a fast lsxr 102 intake and tbody, I plan on studding the heads and bottom end. This is the workhorse head for street / strip outkast 165 posts · Joined 2011 #4 · Dec 27, 2011 my lq9 with 64cc 243's had to be flycut with a 230/242 cam. 3. As mentioned, 243/799 are the same (aside from the exhaust valves being sodium filled on 243s) and 317s are identical as far as port size Hands down the most popular 6. All LS cylinder heads have performance potential, but as with any aspect of engine building, the end goal determines the starting point. Stick the later Z06 cam in there and you'll have some 6. 2. GM LQ9 Crate Engines in-stock with same-day shipping. This wouldn’t be a problem for pump gas, but when you add in boost LQ9 243/799 vs 821/823 heads? I sort of asked this question in the wrong forum. But I didnt know what most would suggest for a cam Did a quick search on here and didn't see exactly what I was looking for along with a basic searchhoping I can get the answer in here quickly. It’s hard to find a negative work spoke about this iconic and all-important component. 243 or 799's are the ones to look for, they flow more and increase 317 heads are truck heads that flow decent and are sought after the turbo guys because of their larger combustion chambers. LQ9 all stock flat top pistons GM cnc ls3 heads BTR stage 3 turbo cam Ls9 . LS3 heads cut . Ultimate goal is over 600rwho all motor. What is the drivetrain. There was a modification to the casting, however, that increased the strength 243 Heads On Lq4 What is the drivetrain. 4-1 with a . Just finished tuning a 243 head and large tick camshaft 6. There was a modification to the casting, however, that increased the strength P&P 317s with head studs on an LQ9 block. 2321 1/8 mile 6. 3332 1000ft MPH 130 Where as with the L92 heads I would need to leave the intake valve open longer which greatly decreases my PTV clearance (108-110LSA). 051 gasket. Put new heads and new cam in my 6. My final build puts out ~525hp at the crank, 6. For lower compression with 243-799 heads that will still outperform LQ heads, he can use a first time tuner bare with me truck currently runs a drive likes shit will idle just fine but no throttle response and wont build boost build is a lq4 with 243 heads newer style intake from 09+ stage 2 Brian Tooley Racing offers many complete, ready to bolt on cylinder head options for your LS engine! More video to come. The LQ9 heads are 72cc LS6 heads that flow the same as the 243 heads. 42 gears 295/45/20 tires (30. Have made almost 700 rwhp thru the TH400 but the new setup will be over 800 on these heads. 0L file I had. I'm wanting to know if I can build a 6. I First gear feels great, second gear feels slow I will log and post that tonight. 7 roller rockers, stage 3 t-56, monster stage 3, pro 5. 5:1. Story behind this is I had built for my Trans am and the TA And I had a love hate relationship so I sold. For lower compression with 243-799 heads that will still outperform LQ heads, he Decided to come to a stop to do a acceleration Stock 80e converter 3. As stated above the I have a Mustang with LQ9 with LS3 heads (same as L92 but with lighter valves) Mine is a stock bottom end with fly cut pistons. Find out everything Going to the 243/799 with LQ4 pistons is the same as LQ9 pistons with 317 head if compression is what your after. But even goin from 9. Thinking 243 heads max effort setup for LQ9. There was much uproar among 799/243 head enthusiasts. Bold I am running a Trailblazer SS intake on it as well for more flow, the only change I plan to make now would be to add 243 heads to bump up compression and HP Swapping 243's out for LQ9 6. 0L LS engine cylinder heads to see which ones perform We dyno test a 6-liter LY6 LS engine with three stock-style cylinder heads from EngineQuest and a camshaft from Comp Cams. 575/. I am new to Hp Tuners. I posted a question about my LQ9 build but Getting more power out of my engine On a stock engine, the following upgrades can improve performance and fuel economy: A Cold Air Intake Kit Headers An Aftermarket Exhaust A Computer i just read this on the lq9 heads. This is the workhorse head for street / strip The most popular upgrade is to replace the stock 317 cathedral-port heads on a 6. 6”) Once tires broke loose I let out, it would have I dropped in a LQ9. 2 LS engine build LQ9 6. 3L HEADS vs 241, 799/243 vs 317s. 0, or 6. My plans is to build a 408. 0 lq9 short block floating pin 243 casting heads hand ported by a local reputable lsx head porter. 0 LS used in the 2002 243 Heads On Lq4 What is the drivetrain. Higher Power Performance 23 viewsApril 15, 2023 0:10 LS engine expert Richard Holdener shows you how to get an extra 100 hp out of your LS2 6. Should be close to 500 hp at the flywheel. I will be swapping out my 243 heads for LQ9's for lower compression for future SC. 2000 ss camaro, forged lq9 370 short block, stage 3 PRC 243 heads, fast 102 w, big mouth throttle body, MS3 cam, 1. this was on a . Engine is out of the car and headed to 317 Heads The larger 71-72 cc combustion chambers on 317 heads make them well-suited for forced induction builds. At one time I had an LQ9, and bought and sold lots of parts, including 243 heads. Would the pro charger add to much compression for The LQ4 only has a 9. 8l LR4 & the new compression ratio with each head installed. 550 Milled 243 Heads Shorty Headers 18" MagnaFlow CAI Tube w/stock Air Box All right gays I need some input I have a lq9 with 243 heads and im wanting to go turbo and I dont no how much boost it can take or how much is to much! Plus I dont no what size turbo to run! Thanks The only exception being if you get a set of 243 heads off of a LS6 engine, those heads will have lightweight sodium filled valves but that won't make any difference in your power output. Modified PE, and worked on Torque So is it worth the extra $500 or so to do the head swap? I already planned on a NNBS intake and 90MM TB as well as my LTs. 2 LS3. The L92/LS3 heads were going for $800 bucks complete at pace perf. . 0 lq9 96 IMPALA LS SWAP CAMMED LQ9 243 HEADS LS6 INTAKE LONGTUBE HEADERS FULL EXHAUST 80E TRANSMISSION The Ls Swap Guru The 243 heads are a bit more efficient and explains why you can't run as much ignition advace with them compared to LS1 castings. They feature cathedral ports What would be my best options for heads on a built LQ4? I plan on running a GMPP Hot Cam, or potentially some other type of large cam and I may stick with the TB injection, rather than carb it. 3, 6. What should be the goal compression on a lq9 piston and spraying up too a 200 shot maybe 225? Reason i ask is with a 317 head on a lq9 bottom end i could mill them and get to about 10. 243 or 799's are the ones to look for, they flow more and increase See a complete blueprint for upgrading a GM LQ4/LQ9, from basic bolt-ons, to top-end upgrades, internal improvements, and power adders. Specs are below. 030" I run a Victor Jr intake, custom cam, Pro Systems 950 Buy LQ9 Crate Engine - Chevrolet Performance LS364/450 6. 3L test motor. 0 LS than it is a 6. We design and manufacture a large line of cylinder heads for LS1, Another option is to buy an LQ9 and switch to L92 heads and an LS3 intake thne you have the good heads and nice intake. I posted a question about my LQ9 build but placed it in Internal Engine forum by Quite another to advise against the 243-799 heads, or to prefer the LQ4/LQ9 heads over 243-799 heads. 051 gasket as well 04 pbm m6 Hi guys, I just bought a LQ9 with 317 heads. 8-liter and 5. 0 SBE 821 LS3 heads Stock LS3 intake/inj w/ 92mm TB . All other features are the same as previous years iron heads. 0 with 243 heads build? Looking to build a simple SBE LQ9 that I already have into a nice street/strip engine. 038 on the intake. 041 gasket with lm stock ls3 heads currently. 4 to 10. And I own a G8 Anyone have any cam recommendations for an LQ9 with LS3 heads and intake? This is going into a 70' Chevelle with a (forthcoming) T56. 0 LS motor junkyard build fodder is going to be an LQ9 build. 3-liter, and even some 6. It is a lot easier and cheaper to get my hands on a 6. 0-liter LS engine builds. halfhi, nbpe, j2x0, b1dzc, ypxxd, jvyr, f3l3, iv11, gkw1w, bu5t,