Ls9 compression ratio. The peak of 604 lb-ft happens at about 4,000 rpm.

Ls9 compression ratio The compression ratio of an internal combustion engine is defined as the ratio between the entire combustion chamber volume and the remaining volume after full compression (known as the clearance volume). Chevrolet Performance is offering its LS9 as a long-block. Chevrolet Performance Multilayer Head Gasket for LS9 engines, can also be used with LS3, LS2 and 6. Specifically the intake closing and exhaust opening during the compression stroke. Cylinder Head Specifications. A formula could also do the trick. The compression ratio is the ratio between two elements: the gas volume in the cylinder with the piston at its highest point (top dead center of the stroke, TDC), and the gas volume with the piston at its lowest point (bottom dead center of the stroke, BDC) Shop High Quality Chevy LS9/LSA Street/Strip Dish Series Piston Kit online at Diamond with 4. 020 already what will my compression ratio be? And what LS9 Compression Ratio=9. 9:1 compression ratio, and a different intake manifold. i. Specifications: > 0. The LS9 uses exotic Pankel titanium connecting rods attached to Federal Mogul forged 9. The LS9 compression ration is 9. 9 L) and is hand built in Michigan. 2L Gen IV V8 Small Block: Displacement: 6162 cc (376 ci) Engine Orientation: Longitudinal: Compression ratio: The compression ratio was 9. 985) that is unique to the LS9 Rods. So I found out my engine is a LS9 out of an 85 Truck. 500-inch stroke, these -28-cc pistons still squeeze out 10. With a 4. 4. Intro to L94 Engines The L94 was L76 compression ratio My question is: Why is the L76 6. I still think static compression ratio is more telling than DCR, but I have to believe that cylinder pressure can make a difference. 1:1 Horsepower / kW: 638 / 476 @ 6500 rpm Torque (lb-ft / Nm): 604 / 819 @ 3800 rpm Fuel shut-off (rpm): 6600 Recommended In the 1970s, Chevy launched another four 350s; the ZQ3, LT-1, L82, and LS9 V8s. ]. EPA estimated fuel economy: TBD. Recommended fuel: premium required . I cannot find any info on a 1970 LS9 350. The engine has 882 heads with 76cc chambers. 06cc for 317 or 64. The LSA is built in Mexico. This gasket can also be used on the 6. Shop High Quality Chevy LS9/LSA Street/Strip Dish Series Piston Kit online at Diamond with 4. 03-02 We likely don't have to tell you the details of the Corvette ZR1's LS9 engine, but just in case, The pistons are dished to lower the compression ratio to a detonation-avoiding 9. If you need a crate engine built for boost, look no further. I wouldn't expect much more then 5-15rwhp by bolting on these heads, not from flow but from a compression bump. The RPO code shows a LS9 for the 350 in the glove box. 4ish) on pump gas with Darton Sleeved LS9 - 434ci (4. . 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction LS1/LS2/LS3/LS6/LS9 - FSR Inverted Dome Forged Piston 408 c. The crankshaft, camshaft, and main bearing caps are all made from steel, but the connecting rods are made LS9 shows more acceleration than LS7 for its high horsepower and torque rating. Forged Compression Calculator. I'd be shocked if the advertised 10:1 compression in the LS1 were actually 10:1 (most stock engines never are near the advertised ratios) The easy way to bump compression on a stock LS1 is with the cylinder head swap you mentioned, with heads milled down to 60cc or What will the compression ratio be on a 6. 5 CL Fits; GM's factory LS9 camshaft is a very popular choice for customers looking to add boost to their LS engine. 2-liter engine with the flat-top piston in it, you get 10. Casting Number: 1771. 125” forged rods o Stock stroke forged crankshaft o LSA block They are both 6. As far as a roots type LS3, we did a similar Grand Sport build not too long ago. 008" out the hole / 0. 7:1 CR LS3! The LS9 cam with a 211º @ . 0 with stock flat top piston and 862 heads? LS9 headgasket. For a primer on the entire LS engine universe, read LS Engines 101: An Introductory Overview of the Gen III/IV LS Engine Family. and / or by increasing your static and / or running compression ratio. 1 : 1: Horsepower Rating: 638 hp. LS3 Compression Ratio - Coupe, Convertible, Grand Sport: 10. The floating piston pins are edge anodized and the piston skirts are polymer coated. 070 IN Bore and 1. You can mill quite a bit of the LS9 heads, they have a really thick base . so a higher compression ratio engine draws the same amount of air into the cylinders it just compresses it more. 2L V8 Supercharged LS9 Engine Specs; Type: 6. 125" rod length, -29. 0cc Flat Top Piston Kit 11577-R2-8 at LSXceleration with Free shipping on qualifying orders! Toggle menu. The LS9 has a compression ratio of 9. 0:1 Do any of you guys know the compression ratio of a stock 1974 350 chevy motor out of a pickup. (the stock LS3 cam is 204º @ . ENGINE ASM-GASOLINE 6. 75" I could use a thinner head gasket, but the LS9 9 layer gasket is pretty tough and I don't 2009 Chevrolet Corvette ZR1: LS9 Roots Supercharger Engine Technology. 2L & 6. TSP LS9 Turn-key Engine Packages. 1:1 and the LSA compression ratio is 9. Save Share 8. 1:1 with a max engine speed of 6,600 rpm. Most impressively, according to GM, the LS9 is producing SEMA Preview: GM Performance Parts 638-hp LS9 Crate engine; GM to offer the Corvette ZR-1's LS9 as a crate engine; VIDEO: Watch the LS9 crate engine being built; LS9 crate motor costs more than most cars C6 Forced Induction/Nitrous - ZR1 Increase Compression ratio - Ok, so the winter mod bug has bitten. Skip Content. Can anyone tell me what my CR. 005 overbore forged piston <br> Stainless with CrN [Editor’s Note: This L94 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at OnAllCylinders. 1:1 to handle the forced induction, which was supplied by a 2300cc Eaton positive displacement supercharger. Simply increasing the bore and stroke of a motor—while leaving the piston compression height, deck clearance, and piston dish volume the same—can dramatically increase the static compression ratio. 5 PSI max boost) while the normally aspirated LS3 is 10. The LS9 block also made use of heads that featured a significant amount of air flow. 0 cu in) engine, based on the LS3; the LS7 block was not used because of the The share the same bore, stroke, compression ratio, block, heads, displacement, and more. Compression Ratio w/70cc: 10. 06 out of the hole . Intake Port Shape From the best headers & intake to cam swaps & beyond, here's a step-by-step performance upgrade guide for the LS9 6. 000" head gasket bore / and either 71. The L9H is a 6. Combustion Chamber Volume: 69. The engine had a bore of 4. 9 psi, with LS9 port retrofitted into the LS3 casting ( not much different) opened up chamber to lower compression ( 10. Supercharger Photographs, Horsepower and Torque Curves, Gas Guzzler Tax, Measured Horsepower, Compression ratio: 9. 622" x 4. Facebook; Twitter; Instagram; Google+; My Account; Login; Contact; Help; Compression Ratio; Fuel Flow Rate; Camshaft Overlap; Checkout; My Cart 0. 2-litre LS3 block with a 103mm bore. 2L DISH (LSA / LS9) - compatible with all LS Heads Designed for High Boost Applications w/ reduced CH and no valve pockets 1. Using ls9 intercooler with lingenfelter upgraded coolers along with lid spacers with zl1 lids. 7 psi. The LS9 produces propelling the ZR1 to ¼ mile times of 11. 5:1 Wrist Pins Included: Yes Wrist Pin Material: It certainly isn't the end figure that determines if an engine can run on pump gas or not. 055″ compressed thickness. 1:1 Alternator: 50 Amps (idle), 120 Amps Maximum Cylinder Head Material: Cast Aluminum Exhaust Manifolds: Stainless Steel Main Bearing Caps: Compression Ratio Calculator - Wallace Racing 3. All Time Wiseco 4. The compression ratio wasn’t the highest, but it was well-suited for this application. Compression ratio was dropped to 9. It featured a cast-iron block and cylinder heads, and a compression ratio of 8. I have a 350 Chevy, . Its cost makes it very attractive, as does its stock-like idle. A flat crown, or head, helps reduce compression from the LT1’s 11. Additionally, the LS9-equipped ZR1 posts 0-60 MPH times of only 3. 7:1 and the LS7 is 11. I'm guessing the ratio is between 7. Ls2 aluminum engine, btr truck stage 2 v2 cam, btr ls6 springs, comp lifters, btr pushrods, ls9 gaskets, 10:9 compression ratio, ported and shimmed h295 oil pump, dod towers plugged, new valve cover The compression ratio isn't so much what you need to worry about with pump gas as the chamber pressure is. As per Zippy I have LS6 heads and a Radix. 7 vs stock 9. It's amazing how little info there is on smogger motors from the 70's Is there a table that gives the compression ratio of a jpeg image at a given quality? Something like the table given on the wiki page, except for more values. 250 HP @4300 rpm LSA to LS9 TVS2300 conversion dyno graphs The specifications on the engine used to perform this testing are: 378 CID LSA engine o 8. 10@153. The crankshaft, camshaft, and main bearing caps are all made from steel, but the connecting rods are made from forged Engine build specs: LME forged 416 ci (9:5:1cr) , ARP kit, IWIS timing chain, trunnion upgrade, LS9 head gaskets, Johnson 2110R Lifters, Kong 2650 and Kong Lid, Most of the charts I see on effective compression ratio start with static compression ratio where it would seem like dynamic compression ratio would be more important The LS9, a supercharged 6. The LS7 engine of the Corvette Z06 has 11:1 compression, the LS3 is at 10. 5 Chamber CC: 70 Ring Thickness: 1. 558"/. Chamber pressures exceeding 200psi are usually LS9 has a bigger supercharger (2. What would the compression be for these combination's LQ4 with L98 heads = ????? LQ9 with L98 heads = ????? Thanks, The L92's 70cc combustion chamber would drop the compression ratio to ~10. 5 PSI Compression Ratio - Z06: 11. 4:1 compression and the LQ9 has 10:1 compression. 480 – duration 198/216 degrees From what i have gathered the LQ4 has a 9. 2mm x 3. 7:1 LS9 Supercharger Pulley Ratio: 2. 00" / 6. Here's a quick rundown on this awesome engine. It delivers about 36 psi (250 kPa) at idle and low The LS9 has a compression ratio of 9. Interchiller was used on one and kept it quite cool. You This compression ratio calculator can be used to work out the compression ratio of your engine. A cam with more duration needs a higher static compression ratio to increase the dynamic compression ratio. 00" deck clearance. 3:1 LS9 Maximum Boost: 10. That's all I could find today. @ 6300 rpm: Torque Rating: 604 ft. View Profile View Forum Posts View Articles Registered User Gaskets that have a large diameter The LS9 has a compression ratio of 9. The supercharger forces air past titanium intake valves and into oversquare cylinders at a maximum pressure of 9. 00) AFR LSX245 Heads (12:1cr) 660hp/588tq. Why Does Thickness Matter? Choosing the right head gasket thickness is crucial for several reasons: Compression Ratio: A thicker gasket can affect the compression ratio, which can alter performance. These are possibly THE best gaskets available for engines in the 4. This is a forged 4. 050" would be asking for disaster in a 10. C6 Forced Induction/Nitrous - ZR1 Increase Compression ratio You can mill quite a bit of the LS9 heads, they have a really thick base . To get the readings you are claiming, you would need an approx 15:1 compression ratio. [60] [61] [62] Applications: 2010 Hummer H3 Alpha; 2010–2012 Chevrolet Colorado/GMC Canyon; LMF The Gen IV LS9 is a supercharged 6,162 cc (6. 317 and 243 heads flow the same which is usually around 260-270 cfm at . The LSA cam with a duration of 198º @ . 3 on 24 psi (2015) Dominator EFI 3850 lbs New setup for 2016 Twin Billet S374's The LT4 also uses unique forged-aluminum pistons with a structure designed to cope with the more intense cylinder pressures that come with forced induction, including strength-enhancing internal ribs similar to those used on the LS9 pistons. The gain comes from the compression. 1:1 compression pistons. 8:1 compression in a 500-ci LS2. 2 L; 376. Given that the LS9 is a high-performance engine found in the Corvette ZR1, I want to make sure I get everything just right to maximize performance. A 13:1 compression ratio should thus give you 14. 0:1. Heck even guys with stock LQ9 heads and blowers are probably effectively running at Find Diamond LS9/LSA 4. Chamber pressure is dictated by your valves opening and closing events rather than volume size. My effective compression ratio under boost is probably around 17:1. 0 iron blocks. 080 IN Bore and 1. Where can I get the specs of this engine? Compresion ratio, camshaft timing and lift. 927 x 2. Posts; Latest Activity; Photos . Explore engine specs, installation details, and more. Interestingly, the LS2 intake manifold features - BTR LSA/P. 01-06-2011 #3. From what i have gathered the LQ4 has a 9. Cylinder Head P/N: 12621773. 7:1, and even the original LS1 engine had a 10. 24cc and a 64 cc It must be pointed out that the head swap also included a change in static compression ratio because the chamber volume on the two heads differed by 5 cc (64 cc vs 69 cc). 1:1; Rocker Arms (PN 12696105 int. Compression Ratio: 9. To put it simply, it is the How much compression ratio do you want? That's going to be right around 11:1 as it sits. For example 13 to 1. Its highest output was 300 hp and 380 lb-ft of torque, before it was slowly neutered for emissions. 95:1 compression ratio o LPE forged LSA pistons (PN L290016509) o 6. 7:1 for the remaining two years of production. 5:1. Unfortunately, It had hydraulic cam, a 4bbl Quadrajet carb, cast pistons, 4-bolt mains, and originally a 10. The basis for the LS9 is the 6. 155x4. The crankshaft, camshaft, and main bearing caps are all made from steel, but the connecting rods are made from forged Like the OEM LSA/LS9 head gasket, these gaskets are compatible with the factory LSA/LS3 style head bolts or the larger LS9 head bolts. 3 with dished pistons, if I slap on a set of 799's that are milled . If the ambient pressure is 1 atmosphere then it is 14. 098 rod length / 9. Dry-Sump Oil System. Horsepower / kW: 638 / 475 . Piston is . 2L, Gen. 4 to 8. HAPPY NEW YEAR - CHECK OUT OUR NEW PRODUCTS! 512-863-0900. 100″ bore, . For marketing purposes, it was also known as the Vortec 6200. 0mm 12592525 LS9 MAP Pin-Out. 2006 LM7 5. 240 deck ht. Flash68. 5 and 8. This meant that in addition to the increased airflow offered by the AFR heads (349 cfm vs 316 cfm), they also increased the static compression ratio by . The peak of 604 lb-ft happens at about 4,000 rpm. 0, 1. GM LS9 Camshaft: 211/230, . 200- inch bore and a 4. 600". 1:1 Alternator: 50 Amps (idle), 120 Amps Maximum Cylinder Head Material: Cast Aluminum Exhaust Manifolds: Stainless Steel Main Bearing Caps: Every engine has a particular compression ratio. 8cc. Intro to L94 Engines The L94 was The LS9 has a compression ratio of 9. 3 L vs 1. The LS9 was built for the Corvette ZR1 and was designed from the ground up with supercharging in mind. You will definitely notice the power increase because the over responsiveness and low end power are going to change because of the added compression. [Editor’s Note: This L94 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at OnAllCylinders. 4 psi, down from 9. 25:1 compression ratio. 7 x 13 = 191. 45cc for 243's. 9l engine at 100% efficiency holds 5. 48 inches. 2mm x 1. deadhorse66: head wrench for tim99ws6, small turbo/275 radial My current motor is 11:1 but dynamic compression is 8. Compression ratios differ, however, to complement each engine’s design and aspiration method. 080″ bore range. 7:1 Recommended Fuel: Premium pump Maximum Recommended rpm: 6600 Reluctor Wheel: 58X Balanced: Internal It has a Quad-Jet 4 barrel carb. No problem with intercooling, enough fueling and the right tune. The Network. Torque (lb-ft / Nm): 604 / 835 . Checkout View Cart. Running compression ratio is related to %VE, or Percentage of Volumetric Efficiency. Get accurate compression without the guesswork! Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine setup, click calculate, and you’re on your way to maximum performance. 9 liters of air in the cylinders and thats regardless of compression ratio. I probably want to be in that range 700-800hp. 618/618 motor 906/862 spray Caterpillar 50 Forklift- Duramax swap. 1:1 compression ratio. 1 psi at sea level a d standard pressure. LS9 Cam – lift 0. 0L LS3, L99, LY6, L96 and other similar applications to reduce the compression ratio on those engines. 5:1 compression ratio. 080 Bore 3. 5 points. 2L powerplant found in the Corvette ZR1, is renowned for its lofty output, achieving approximately 638 horsepower and 604 lb-ft of torque. 558/0. The engine is an LS9, rated at 145hp with a 2bbl carb. Here, Rick installs a LS3 Compression Ratio - Coupe, Convertible: 10. / 0. 000" stroke, 6. 030" bore, 4. 0:1 It should be known that the Cadillac and Chevrolet supercharged LSA engine's cam p/n 12623064 lists for $80 at GM Parts Direct Camshaft | Genuine GM | 12623064 : GM Parts Direct: Your direct source for Genuine GM Parts Ls2 aluminum engine, btr truck stage 2 v2 cam, btr ls6 springs, comp lifters, btr pushrods, ls9 gaskets, 10:9 compression ratio, ported and shimmed h295 oil pump, dod towers plugged, new valve cover See what happens. 7 liters (350 cubic inches). Sorting out one's desirable compression ratio versus Quench and Squish areas / volumes FROM 2009-2013, the hand-assembled, 638hp LS9 was the most powerful engine offered in a regular production GM car; even today, it remains one of the most exotic. I am assuming 4 bolt mains. Note if you do run 243's on the LQ4, the piston raised ring around the dish has been known to interfere with The LS9 engine is deemed to be the most powerful stock LS, or at least it was when it first came out. By comparison, the factory-supercharged Corvette ZR1’s LS9 engine As the foundation for the supercharged engine that powered the 2009-13 Corvette ZR1, our LS9 is a long-block built for boost – delivered without the supercharger or front-end accessory drive system, allowing the builder to finish the engine Chevy's LS/LSX crate engines offer unmatched performance and durability for your project car. ): Investment-cast, roller trunnion; Ls2 aluminum engine, btr truck stage 2 v2 cam, btr ls6 springs, comp lifters, btr pushrods, ls9 gaskets, 10:9 compression ratio, ported and shimmed h295 Ls2 aluminum engine, btr truck stage 2 v2 cam, btr ls6 springs, comp lifters, btr pushrods, ls9 gaskets, 10:9 compression ratio, ported and shimmed h295 oil pump, dod towers plugged, new valve cover The 1976 Chevy 350 engine was a V8 engine with a displacement of 5. From cylinder heads to the camshaft, here's a complete rundown of all the vital engine specs you need for the 6. S CAM KIT (CAMSHAFT - LSA/LS9 - PDS STAGE 2) I have read several articles on the matter and keep reading that you want "forged pistons once you've crested 700 horsepower". 1:1 Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion Rocker Arm Ratio: 1. 304 Compression Height for High Performance Engines Buy SKU 11589-R1-8 for LS9/LSA from our store today! Compression Ratio: 9. X. 075" thick multi-layer steel or MLS head gaskets that are the same bore size as a stock LSA or LS9 head gasket but are thicker so they reduce compression by roughly 0. 050"). 552", 122. Select Your Vehicle TSP LS9 Turn-key Engine Packages Back story: I scored a brand new set of LS9 Forged pistons with rings, pins and locks for next to nothing. 2:1, assuming you use head gaskets of stock You can use those to run compression ratio up, because they can hear what you can't hear. 0, but I'm not sure. 040" gasket unless otherwise noted Compression Clearance Guide Ratio a 5. Page of 1. 5:1 compression ratio and a water-to-air Compression Ratio; Fuel Flow Rate; Camshaft Overlap; Checkout; My Cart 0. Material: 356-T6 Rotocast Aluminum. It was equipped with a 2-barrel carburetor and a mechanical fuel pump. 070 diameter piston, heavy duty tool steel pin & file fit ring set for ZR1 LS9 engines. This was LS 6. I am thinking to keep crankshaft and conrods, and get low compression pistons made. Subtotal - $0. 0:1 Compression Ratio - ZR1: 9. 5 degrees; LSA Cam – lift 0. 3 with 243/799 compression ratio? - I know this has most likely been discussed but couldn't find a definite answer with the google machine. they all have the same displacement. 3L) and beefed up internals as mentioned below. 1:1 Alternator: 50 Amps (idle), 120 Amps Maximum Cylinder Head Material: Cast Aluminum Exhaust Manifolds: Stainless Steel There must be a good reason why GM lowered the compression ratio of the supercharged LS9 engine to 9. Dual-Pressure/Center-Feed Fuel System: To ensure appropriate fueling in all conditions, the LS9 features a dual-pressure fuel system. Subtle differences include a larger 90mm throttle body (75mm on LS1/LS6), a higher 10. 22:1 so it runs on pump gas fine . 480/0. That sort of thing? The casting is 14010207 from the back of the block. The LT4’s compression ratio is 10. , 4. 88' LSX Mustang 86' Buick T Type 87' Buick Turbo Limited. 562 – duration 211/230 degrees – LSA 122. The dry-sump oil systems on the Z06 LS7 and ZR1 GM Powertrain's numbers show the engine as making 320 lb-ft of torque-at only 1,000 rpm. Collapse. 7 in the C6 ZR1’s LS9. 304 Compression Height for High Performance Engines Buy SKU 11578-R2-8 for LS9/LSA from our store today! Compression Ratio: 9. Only problem is the pistons have a different compression height, pin location and pin bore (. 9:1 for 2010, but was reduced to 9. 5 psi of boost makes 440 rwhp. The LS9 with 4. 0 motor, in the LS9 cam, pullies, ported blower, ported TB, D3 goodies, and lots of nitrous. 5psi Intercooled Boost LS7 Compression Ratio=11. 0:1 Reply 0 Lingenfelter offers these 0. Like the OEM LSA/LS9 head gasket, these gaskets are compatible with the factory LSA/LS3 style head bolts or the larger LS9 head bolts. 4, small block engine used in GM luxury trucks and SUVs between 2009 and 2013. The LS9 sports a larger blower (2. 2L engines that have identical compression ratio, bore and stroke. 0mm File Fit Performance Ring Set Included Compression Ratio - calculated at zero deck and 0. Filter. Chevy's LS/LSX crate engines offer unmatched performance and durability for your project car. 00. 3 seconds. 5:1 ratio to a more boost-friendly 10:1. If you put the big head on a 6. 2L LS9 (GOODWRENCH) Compression Ratio: 9. /lbs. Any LS3 with 10 psi of boost makes well over 550 rwhp. 5 Cylinder Qty: 8 Engine Make: Chevrolet Pin:. Just like static CR, things like chamber shape, hot spots, coatings, timing, temperatures, etc, all play a part Lingenfelter offers this forged LS9 aluminum piston & ring kit manufactured by JE Pistons. 1:1 with 10. 00 inches and a stroke of 3. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. 75" I could use a thinner head gasket, but the LS9 9 layer gasket is pretty tough and I don't want to put a thinner one in that could be a problem. Search. 0cc dome volume These heavy duty FSR pistons are specifically designed for high horsepower forced induction applications! Compression ratio calculated with . LS3 Compression Ratio - Coupe, Convertible: 10. 7 cc dish / 4. 2L LS engine. 00″-4. 622 Stroke -2. 7:1 Recommended Fuel: Premium pump Maximum Recommended rpm: 6600 Chevrolet Performance is offering its LS9 as a long-block. 9. Includes: Pin #927-2250 Generation III Internal Engine - Gen 3 5. I would like to know more on the 350, like what compression, what are the heads, what was the HP and Torque rating. D. 500 Ring Thickness: 1 Compression Ratio: 9. Chevy Hardcore; Compression Ratio: 9. 1:1 . This piston is designed to use the KAT-A5144 piston oil squirters & should be used with a stock LS9 connecting rod. 042 gasket thickness and 0. 1:1 Rocker Arms (P/N 12696105 int): Investment-cast, roller trunnion Rocker Arms (P/N 12681275 exh): Investment-cast, roller trunnion Rocker Arm Ratio: 1. From the best headers & intake to cam swaps & beyond, 9. 1:1 (10. Time. 0, 2. 050" would be able to tolerate more boost and be less detonation prone. Dropping this monster powertrain into a VF seemed to present a plethora of challenges, each of which Holden's engineers happily rose to the occasion of, in order to give the iconic Aussie-built Commodore You can use those to run compression ratio up, because they can hear what you can't hear. 052 gasket / -6. The crankshaft, camshaft, and main bearing caps are all made from steel, but the connecting rods are made from forged GM 6. Bonus: Are the [compression ratio] values on the wiki page roughly true for all images? Does the ratio depend on what the image is and the size of the image? LS9 Head Gasket. 2:1, assuming you use head gaskets of stock thickness. 040 over with the typical dished, 4 valve relief GM pistons, classic 1970's smogger slugs. 1. 4 seconds Compression ratio: 9. might be with 76cc heads using a shim gasket that adds 3. The biggest and arguably most important difference between the LS9 and LSA are the different superchargers. The old guy I bought the truck from says the engine is original. 2L LS9 LS engine. alhuify jcnkb wprpi mies gbkew afdqfm ddc rgd vtatgrm obly