Lq4 motor hp. 0L LQ4 block 243 heads Upgraded rods with LY6 pistons BTR LS3 stage 1. 0L Chevy LQ4 Crate Engine 24x w/Fitech EFI By ATK at LSXceleration with Free shipping on qualifying orders! LSXceleration 550HP 370CI 6. 9) ft. Apr 2, 2025 · The LS engine family is a popular choice for engine swaps and high-performance builds, and the LQ4 and LQ9 are two of the most common 6. Specs available as downloadable PDFs Feb 22, 2021 · Generation III Internal Engine - 408 cam choices - Building an LQ4 408 for my t56 camaro and I need some input as for the cam selections. Engine Specifications: […] Feb 15, 2024 · Discover the impressive power and detailed specifications of the Chevy 6. 0L LQ4 engine, 4l80e newly rebuilt transmission with Hughes towing converter that has a stall speed of 1800 rpm, dual I just wanted to chime in and say 700 go naturally aspirated with an lq4 is absurd. 030 58x By ATK at LSXceleration with Free shipping on qualifying orders! This high-performance engine boasts 505 horsepower and 480 lb-ft of torque, derived from its durable LQ4/6. 8L (404 vs 335 hp in our last test), and 45-50 hp more than the 5. 1 and gave a bump in HP & TQ. Shoot for a 500hp an motor and then boost about 15 psi for around 1000 hp, or 900 wheel like you said. The Vortec 6. Engine Displacement 408ci LQ4-based stroker making 600 HP Forged pistons, rods, and crankshaft for high performance Built on the iron LQ4 block for maximum strength Aluminum heads and aggressive cam for race-level output Ideal base for boosted or naturally aspirated builds See more details Shop GM LQ4 Crate Engines at Speedway Motors, the Racing and Rodding Specialists. 0 with 317 (71 or 72 cc stock) heads and rated at a 9. Introduced in 1997, the family is a continuation of the earlier first- and second-generation Chevrolet small-block engine, of which over 100 million have been produced [5] and is also Nov 6, 2012 · Generation III Internal Engine - 450+ hp LQ4 Build on a budget - I know this has been covered before and I know this is probably getting old. 0L Vortec LQ4/LQ9, a GM engine that boasts legendary longevity, 300-345 horsepower, and towing capability. com 6000 Vortec 6. heavier than the aluminum LS1 block. These will need to be gone through. 0L 365 cid LQ4 engine made 570 horsepower and 500 lb. 571 112+2 2010 Camaro SS Exhaust Manifolds 2006 LS2 Injectors Stock truck intake - DBC May 12, 2025 · The LQ9 delivers about 15-20% more horsepower than the LQ4, with independent dyno tests showing gains of 24 hp and 20 lb-ft over the LQ4, particularly above 4,500 RPM. Oct 27, 2024 · The 6. 0L LY6 jumped from 443 hp and 467 lb-ft of torque to 514 hp at 5,900 rpm and 493 lb-ft of torque at 4,600 rpm. , the block is about 100 lbs. 0L LS engine so popular? Whether you’re planning an engine swap, rebuilding your truck’s powerplant, or just curious about this legendary V8, you’ve come to the right place. of torque, depending on the year and General Motors LS-based small-block engineThe General Motors LS-based small-block engines are a family of V8 and offshoot V6 engines designed and manufactured by the American automotive company General Motors. The LQ9 is a rarer Apr 16, 2020 · All; I am looking for help on parts Numbers and combination parts to rebuild my LQ4 engine I picked up. 0L Iron block and precision-engineered components. Our tune picked up over 70HP & 30TQ over the stock tune. The 2004-2005 LQ4/9s are the ones you want as they have the same rotating assembly as the LS2 with the beefier rods and better wrist pins. This engine was designed to be a performance upgrade for LS based vehicles or perfect for a 2001-2007 Chevy Truck LQ4 or LS swap in a hot rod. Jan 30, 2024 · The 6. 0 engine, also known as the LQ4, is a naturally aspirated gasoline engine. What kind of horsepower would you see. the rest LQ4 CYLINDER HEAD SPECS (1999-00)LQ4 CYLINDER HEAD SPECS (2001-07) Find LSXceleration 600HP 408CI 6. This makes the LQ9 more rewarding when pushed hard, while the LQ4’s flatter torque curve works well for towing and everyday driving. 3L (404 vs 352 hp in our last test), with similar torque gains through the entire curve. Here is why. in): 408ci • Crankshaft: Manley 4340 forged internally balanced 58 tooth reluctor • Rods: Manley 4340 forged H beam with ARP 8740 bolts • Pistons: Manley 2618 forged 10. On the outside they are identical except for a small sticker on the back of the driver-side head, but LS Family , Gen. Feb 15, 2024 · Discover the specifications, configuration, and maintenance tips for the Chevy 6. 622 • Displacement (cu. Jan 24, 2025 · Key Features: Compression Ratio: The LQ4 features a lower compression ratio of 9. 0L Stroker LQ4 Crate Engine 58x By ATK at LSXceleration with Free shipping on qualifying orders! Apr 13, 2025 · With 345 horsepower and a meaty 380 lb-ft of torque, it delivered approximately 20 more horses than the standard LQ4 engine, thanks primarily to that higher compression ratio. 0L iron-block engines out there, the LQ9 (345 hp) and the LQ4 (300-325 hp). Jan 23, 2015 · The LQ4 was also offered in the Denali and a couple of other trucks that was rated at 320 hp and 370 ft lb. Chevy LQ4 Engine Specs Chevy LQ9 Engine Specs Upgrading the LQ4 and LQ9 Engines Benefits Both these engines are strong and durable. If you want to follow along with Olivia and her projects, check her out on Instagram and YouTube at @livscaffidi. That said, the whole engine even with an iron block still weighs significantly less than a small block chevy. Jan 17, 2010 · 2003 LQ4 specs PDF A technical documentation that provides detailed engineering specifications for the 2003 Chevrolet Chevy C Silverado 2WD, LQ4 VIN U engine. They are the ONLY choice for engine builders going over 700 hp as they are much stronger than the aluminum block of the LS2. 0L Iron• Bore/Stroke: up to 4. 1cc ARP Main studs ARP Rod Bolts ARP Head Oct 3, 2019 · We put everything you need to know about the Gen. III & Gen. 0L, Iron Block, Truck Engines Sep 23, 2025 · Learn more about the 6. 000” • […] Feb 19, 2024 · Discover the impressive specs and configuration of the Chevy LQ4 engine, along with essential oil service intervals for optimal performance. 0L motor using simple bolt-on upgrades. The 5. 0L produced 529 hp at 6,800 rpm and 457 lb-ft of torque at 5,100 rpm. 3, 6. My question, with this being my first build, what are some An Overview of LS Engines by RPO including Applications and Detailed Specs. For optimal Performance you will need headers, chassis dyno tune and 36lb injectors. 3:1 compression • Rings: Moly • Camshaft: Hyd. We designed this engine to be affordable yet strong enough to handle a good amount of boost! Engine Specifications: • HP: 550 • TQ: 535 • Block: GM 6. I currently have it down to its bare block. The 3rd generation LQ4 6. I plan on having it hot tanked, bored 30 over. LQ9 vs LQ4 ONLY Z06 Cam Package SS Cam Package The 8th digit of the VIN Number will indicate the engine type “U” is an LQ4 “N” is an LQ9 I validate every engine type with the VIN Number first. Nov 28, 2017 · Before adding boost, we ran the modified 6. Aug 8, 2025 · The 6. Its affordability, durability, and compatibility with aftermarket parts make it a cornerstone of GM’s LS engine lineup. 4:1, which makes it more tolerant of lower-octane fuel and provides a higher margin for forced induction modifications. Other than that, all I know is it has an LS2 camshaft. 0 liters (364 cubic inches), this engine delivers ample power and torque. -ft. My plan is to have 550-600 hp. Your engine may not necessarily come with all components listed, […] Mar 27, 2024 · Engine expert Richard Holdener builds a turbocharged 6. Chevrolet LS Small Block LQ4 engine is installed on Chevrolet Silverado 2500HD (2001-2009), and Chevrolet Suburban 1500 (2000-2009) making the above mentioned models eligible for engine interchange. 051" or 0. To summarize, a stock 6. Horsepower and Torque: Stock LQ4 engines produce between 300 and 325 horsepower and up to 370 lb. in. This compatibility makes the LQ4 popular for budget swaps or the basis for high horsepower Feb 13, 2018 · See a complete blueprint for upgrading a GM LQ4/LQ9, from basic bolt-ons, to top-end upgrades, internal improvements, and power adders. Right now I’ve only purchased a set of ls3 heads. It was launched for the Cadillac Escalade. 0 LS engine is a V8 with a 6. The critical difference is that the LQ9 has flat-top pistons, and the LQ4 has dished pistons. LQ9's have the same internals but have a flat top piston raising the CR to 10. If those heads unmilled were to go onto the lq4 mentioned above with a stock 0. 0L 408 Stroker Kit Balanced 9. 3s and LQ9s won't see as much of a gain as the HD LQ4 as they are not as detuned to start with although the end result HP of the LQ9 with a tune would be slightly higher than a LQ4. Camshaft and Valvetrain: The Heart of the Beast Hello, I'm new to Hp Tuners but so far am having a blast. This was an amazing power output level for GM trucks, SUVs, and vans until the LQ9 showed up in 2002. Currently I'm working with a stock LQ4 bottom end, possibly an LS1 cam or stock LQ4 cam, and single turbo. I've already learned a lot and have so much more to learn. 030 Scat forged crankshaft Scat Ultra Q-lite rods (H-Beams) AutoTec 4032 Forged Pistons -5. Sep 28, 2021 · Ultimate guide on GM's 6. 622 This engine was designed to be a performance upgrade for LS based vehicles or perfect for a 2001-2007 Chevy Truck LQ4 or LS swap in a hot rod. The aftermarket is strong, crate engines are available, and used motors are often cheaply sourced through junkyards. It features an iron block and aluminum heads, providing a good balance of strength and weight. LQ4 is the Regular Production Option code (RPO) that identifies this engine. They can handle over 1,000 hp. 0L With LS3 Heads Base Engine 535HP $ 5,199. Jan 23, 2017 · Run in a similar fashion on the engine dyno, a stock 6. 0L LQ4 Long Block w/ CNC Cathedral Port Heads By ATK This is an LQ4 based engine with LS3 Aluminum heads making a very streetable 550HP+. The 243/799 heads are 64 or 65 cc. Run with the 1 7/8-inch headers feeding the 3. 0L Gen III Vortec engine. May 3, 2016 · There are two 6. 608/. 2:1 Mahle Pistons, Shop every part for power online at CNC-Motorsports Oct 2, 2017 · The engine is a 2005 lq4 6. Build sheet: LQ4 bored 4. The down side is the weight. It includes metrics such as engine type, displacement, bore, stroke, compression ratio, and firing order. Find LSXceleration 600HP 408CI 6. Dec 26, 2019 · The Holley HP ECU wasn’t able to control the VVT cam, so we swapped it out for the LQ4 to establish our baseline. 0 Vortec engine, covering engine history, technical specs, variants, problems and reliability, and performance mods. IV LS engine family in 1 spot—from cam specs to upgrades & everything in between. I recently purchased a gen three LQ4 and wanting to build it for about 550 hp street use and dependable driving with more than enough power. Roller • Cam Specs: 240/256@50 May 19, 2020 · LQ4 Cam vs Comp Cam Run with a stock LQ4 cam, the 6. LS motors don’t blow up after a certain horsepower number or boost number. Jun 9, 2023 · A single turbo LQ4 build is actually pretty easy on the wallet though, just make sure you have the fuel system and other bits to support it. With upgraded internals, the block can handle over 1,000 hp. I’m probably going to use Our Custom SD (speed density) tuning on a bone stock 6. The 823 that have rectangle ports. 0L LQ4 - Car Craft Magazine This engine was designed to be used with a Turbo or Supercharger up to 15psi. We designed this engine to be affordable yet strong enough to handle a good amount of boost! Engine Specifications: • HP: 500 • TQ: 470 • Block: GM 6. This page provides detailed specifications for all Gen III and IV engines and a few notes on some features worth highlighting for each engine. 7 cu. 0L LS Gen III V8 small block engine. I know the compression would go up some, not sure how Order an ATK HP 6. 0 engine hopefully in two weeks. 0L brawler has a widespread range of applications. These LQ4 years share the engine block design, cylinder head bolt pattern, and reciprocating assembly and valvetrain layout of the Gen 3 LS1 and LS6. 0 LQ4 long block to swap into my 5. Upgrading the LQ4 and LQ9 Engines 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 Programmer The LQ4 and LQ9 have very strong blocks. of torque on the dyno, which Olivia was more than happy with. This engine was designed to be used with a Turbo or Supercharger up to 15psi. 0l 700 CC LSA DEATCHWORKS INJECTORS 16U-00-0065-8 LS2 CAM, FRONT CAM SENSOR HAS BEEN CORRECTED LSA BLOWER 3BAR LSA MAP SENSOR REWIRED TO LS1, LS1 SETTINGS MODIFIED FOR 3BAR AEROMOTIVE REGULATOR ATTACHED TO VACUUM FROM THE SAME PORT AS THE SUPERCHARGER ACTUATOR FUEL SYSTEM DEADHEADS INTO RAILS LS3 REC PORT HEADS TKX TRANS 6. Feb 20, 2007 · Inside an LQ4 The engine we chose to work with is the all-iron 6. 0L Gen III small-block that appears in many different larger pickups and SUVs. Nov 2, 2011 · Generation III Internal Engine - How much to you gain putting 243 heads on a lq4 - I don't know if it is even worth it but I am going to change the cam in my 2007 lq4 and was wondering if it was worth putting 243 heads on. 0L LQ4 engine, a true powerhouse for truck and SUV enthusiasts. It is a bored version of the Vortec 5300. The LQ4 is a 6. using nitrous, a blower, or a turbo. This will be my first engine build and looking for all the knowledge and tips I Engine Specifications: • HP: 630 • TQ: 560 • Block: Seasoned OE LQ4 6. Jun 1, 2008 · In this budget LS engine build we mix and match GM Gen IV small-block parts to build an affordable, 6. Expect big mid to upper end power, will have a noticeable idle. Nov 10, 2021 · The only difference between the LQ4 and LQ9 is the piston style, which makes the LQ9 a better performer than LQ4. GAP THE RINGS then run the bottom end as-is. Fuel injected as well. Jan 30, 2025 · LQ4 Engine Specs The LQ4 is a General Motors Gen III V8 engine, part of the LS family of engines, made from 1999 to 2007. the rest Explore the LQ4 6. Even when I only increased the REV Limit of the stock tune to 6000rpm we still gained over 40HP (Yellow Lines). It’s a 6. I was hoping someone could give me some guidance in which direction I should go with this tune. The ATK crate engine is offered in three different stages for ease of finishing an engine swap. The L76 variant offers 335 horsepower and 370 lb-ft of torque, demonstrating its performance capabilities. the reason 99-04 yrs are important is because of the crank and they have 24x reluctor wheels. At 216 lbs. 0L V8 engine from General Motors, part of the Gen III small-block engine family. I am thinking of maybe getting some L92 heads, with an LS3 intake. Engine Specifications: HP: 460 TQ: 470 Block: OE LQ4/6. I've been reading up on the ls1tech. 0 LS engines at JEGS High Performance! LQ4 build: The LQ4 engine, referred to as Vortec 6000 by General Motors, is a small block engine featuring 300 to 325 horsepower and 360-370 foot-pounds of torque based on the type of cylinder heads used. 600-700 would be nice, though I know that might be tough with predetonation. 030 x 4. 0 lq4 for a really good price and I curious what I need to do to make 500 streetable horsepower. 0L LQ4 engine can be seen below. 040” x Nov 27, 2017 · The book on the Trailblazer SS intake is that it makes more torque than the LQ4 intake and more horsepower than the low-profile LS6 unit. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to […] Apr 3, 2025 · If you’re an engine junkie or an old GM truck owner, understanding how to tell the difference between the LQ4 and LQ9 can come in handy. 0 LS has earned its reputation as one of GM’s most versatile and robust engines—offering an ideal balance of displacement, power, and reliability that keeps mechanics Dec 18, 2020 · Adding horsepower and torque to a 6. I’m going for a reliable street warrior with some power. Engine Specifications: […] This engine was designed to be a performance upgrade for LS based vehicles or perfect for a 2001-2007 Chevy Truck LQ4 or LS swap in a hot rod. 0:1 compression. 0 LS engine today from JEGS. com forum and searching on here quite abit. All; I am looking for help on parts Numbers and combination parts to rebuild my LQ4 engine I picked up. 0L Iron Bore/Stroke: up to 4. GM LQ4 Crate Engines in-stock with same-day shipping. Then I actually look at the piston type with a bore light and scope. Oct 7, 2013 · I'm not really working for 800-1000 hp for the street. 0 L (≈366 cu in) from 101. 0 liter LS engines from the factory. This article lays out the most common question about the LS-series engine specs. roller camshaft and cathedral port aluminum cylinder heads, it delivers exhilarating acceleration and robust reliability, making it perfect for Jul 28, 2024 · Purpose-built as a truck engine, LQ4 horsepower ranged between 300 and 330 with torque in the 360 to 370 lb-ft range over its nine years of service, ending in 2007. That’s old school Internet Aug 29, 2022 · It's important to understand all of the differences and types of LS motors before beginning a new build. 5. Additionally, the document outlines dimensions and tolerances for various engine components including camshaft, connecting rod Dec 7, 2023 · I’m new to the LS game. My dads truck is a 2000 Chevrolet Silverado 2500 with the 6. . 030”x 4. 000 • Displacement (cu. PSI Conversion outlines its heavy-duty specs, iron block durability, and LS swap-friendly features. 0-liter L92 powerhouse based on an LQ4 engine block - Super Chevy Magazine Jul 26, 2011 · The 325 hp rated lq4 in the Denali/H2 is NOTHING but a different factory tune than the 300hp lq4 in the HD trucks. 0L LQ4 The Vortec 6000, or LQ4, is a V8 truck engine. Oct 28, 2009 · Hey Im gonna be getting a LQ4 6. 0L Iron LQ4 with ARP main studs • Bore/Stroke: 4. Buy ATK HP 6. We might use a power adder down the road, so we went looking for an Oct 20, 2020 · After installation of the TrackMax cam, the power output of the 6. 0L iron • Bore/Stroke: 4. 0 will make about 300-340 HP. I do not plan on Spraying the Looking to achieve 450-500 wheel horsepower, all motor. 0 LS engine LQ4 was produced from 1999-2007 for GM’s truck, SUV, and van applications, such as the Silverado, GMC Seirra, Suburban, and more. I plan on dropping it in my s10 and putting a t56 behind it. Initially introduced in 2001, this engine has become popular in both factory applications and the aftermarket scene. of torque at 4,600 rpm. 2L L92 produced 445 hp at 5,600 rpm and 460 lb-ft of torque at 4,600 rpm. 0-liter displacement, producing 360-400 horsepower and 380-400 lb-ft of torque, depending on the variant. I really want to avoid E85, but I'd like to work with "safe" boost numbers. Engine Oil Specs & Service Intervals Proper engine oil specifications and regular maintenance are crucial for keeping Shop the Best available ATK HP Crate Engines GM LS 408ci parts at the Guaranteed Lowest Prices! High Performance Parts Delivered Fast. 0L variants you’ll find in GM trucks and SUVs. It was widely used on many popular GM models, like Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, GMC Yukon /XL, and Hummer H2. Most notable are the LQ4 and LQ9 Vortec, used in the GM’s 1500 and 2500HD series trucks (Gen III/IV LS truck engines are all Vortec). The LQ9 is a higher output version with a 10:1 compression ratio and 345 horsepower. 6 mm bore and 92 mm stroke Mar 24, 2009 · I have the LQ4 and I've read that there are many things you can do with this motor. 0L Iron LQ4 • Bore/Stroke: 4. ATK HP110 Chevy LQ4 6. Feb 1, 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. BD SD Tune = BLUE. 00 Lead Time: 4-6 Weeks default Nov 20, 2017 · Forum Tuning GM V8 Tuning GM V8 Tuning - Engine, Gas (Gen 4) LQ4 Tuning Approach Results 1 to 5 of 5 This LQ4/408CI Stroker with LS3 Aluminum heads is making 600HP+. Many people use them with boost or nitrous. Known for its reliability and aluminum construction, it is popular in Chevrolet and GMC vehicles and favored for performance upgrades. LQ4 - stock came at around 340 HP, ran a 9. Here is a link with some info on a 480 hp LQ4 May 3, 2016 · We grabbed an LQ4 LS truck engine from a junkyard, rebuilt it, tossed on a carburetor, and made 464 hp on the engine dyno! Aug 3, 2021 · With some 5w30 oil running inside it, the 6. 0L LQ4 LS and puts it on the dyno—see the full build & test results here. The LQ9 engine was introduced in 2002 as an improved and higher output version of the LQ4 engine. Feb 12, 2025 · The LQ4 engine is a 6. Dec 16, 2024 · Producing 300–325 horsepower and up to 370 lb-ft of torque, the LQ4 has also become a favorite for engine swaps and performance builds. 0L V-8 (LQ4) is an LS-based, Third Generation, Chevrolet Truck Engine (Gen III V8). Sep 22, 2016 · There are several iron-block 6. in): 370 • Crankshaft: OEM GM 24 tooth Engine Specifications: • HP: 600 • TQ: 550 • Block: Seasoned OE LQ4 6. 4:1 compression and the LQ9 clocks in at 10. The 6. I am thinking of LS3 heads, and intake with coils. Roller • Cam Specs: 240/256@50 May 1, 2019 · 1999 6. You can easily daily drive it, race it on the weekends, and it makes plenty of low Jul 12, 2024 · LS1 ECM LQ4 6. Find LSXceleration 460HP 370CI 6. Jul 9, 2012 · 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. 0L engine is built with 300 – 330 horsepower and 360 – 370 torque output levels, respectively. Jan 1, 2013 · Making just a smidge more than 500 hp, our budget-friendly 6. Dec 11, 2014 · For those of you not familiar, the LQ4 and LQ9 are the iron block versions of the LS2 engine used in trucks. 030”x 3. Just picked up a 6. 0L (364 cubic inches) displacement engine, with cast iron blocks and aluminum heads. -lbs. 4:1 CR. 0L GM Truck LS engine with bolt-on parts. 0-inch exhaust, the LQ4-equipped L92 produced peak numbers of 445 hp at 5,600 rpm and 460 (459. 040 x 3. As for your reliability concerns: they’re baseless. 0L Stroker LQ4 Long Block 4. This ATK engine has a superior design over the original and offers 550 horsepower. 0L will produce a solid 70 hp more than a 4. What I am struggling with is know the right combination of parts to achieve this goal. 1 compression because of the dish design of the pistons. With a displacement of 6. Need more horsepower? Check out this GM LS 6. Compare it to the M40B16 to see why businesses and people still trust it. 0L LQ4 engine on the dyno in naturally aspirated trim. The motor currently has stock crank, rods, and pistons. Depending on the year and application, the LQ4 was rated 300 to 335 hp (224 to 250 kW) and 360 to 380 lb-ft (488 to 515 Nm). Feb 26, 2025 · The LQ4 variant produces between 300-325 horsepower and 360-380 lb-ft of torque. - 221/228 . 0 LQ4 engine, a V8 powerhouse for truck and SUV enthusiasts. Sep 11, 2024 · LS engine expert Richard Holdener shows you how to seriously improve the performance of a 6. I wanna achieve about 500hp. This is an LQ4 based engine with new casting ATK CNC Ported LS3 Aluminum heads making a very streetable 575HP+. But I'm new to the engine building world. Displacement is 6. 3 GMC Sierra single cab short bed. I’m looking for help in figuring out piston and rods and cam and springs. The LQ4 has 9. I have an opportunity to buy a 6. What we have here is a custom engine that the only Dec 1, 2009 · The end product of all this pimp hardware is a motor that revs freely to 7,000 rpm and spits out 505 hp, which makes it the baddest naturally aspirated small-block ever built. With custom performance features like a hyd. Oct 27, 2009 · In this tech article CAR CRAFT shows that building an LS-based engine is easier than it seems as Jeff Smith builds a 404ci GM LS stroker motor from a 6. Home Knowledge Base - Home HE-04809Chevy LQ4 Engine Specs May 3, 2009 · Everything you ever wanted to know about the LQ4/LQ9 engines! OP PONTIAC SLEEPER, theturboforums. 052" head gasket, what SHOULD the compression ratio be? Apr 16, 2025 · Looking to understand what makes the 6. Engine Specifications:• HP: 505• TQ: 480• Block: OE LQ4/6. g78w2isiawvpof9yry1dhfzwzkonmlopngpkygvm8iu