In general terms, forced-induction engines are safer with compression ratios in the neighborhood of 8. the pistons are different parts having valve reliefs machined into their tops. Between 2007 and 2017, the LS3 was used in. 7:1 LS9 Supercharger Pulley Ratio: 2. The Gen III have 862/706 Gen III heads, and the Gen IV have 243/799 heads. 5 PSI Compression Ratio - Z06: 11. Our testing has shown over 30 hp increase while improving torque below the curve. I know some ls2/ls3 vettes run 10. of torque at 4,600 rpm naturally aspirated Displacement: 376 CID, 6. LS2 Engine Guide: Specs, Features, & More. The LS3 has a CR of 10. 5 PSI Compression Ratio - Z06: 11. com LS1, LS2, and LS3 are all. 7:1 Rocker Arms: investment-cast, roller trunnion Rocker Arms: investment-cast, roller trunnion Rocker Arm Ratio: 1. This LS3 will be running a high 13:1 compression ratio and a 415 ci displacement, supported by clean-burning E85 fuel. This was not so easily achievable with current shelf piston offerings. Connecting Rods: powdered metal. With just the Mast cam, peak power increased to 533 hp, a gain of 64 hp, and the rpm at peak increased by 600 rpm, to. The LS3 block not only has larger bores than the LS2, but a strengthened casting to support more-powerful 6. LS3 aluminum block cylinder bore oversizing is limited to about 4. The higher the rating is, the more energy that’s generated during the combustion process, allowing a better temperature without as much fuel. 4:1 (L99) Horsepower (hp / kW @ rpm): 304 / 224 @ 6400rpm: 426 / 315 @ 5900rpm (LS3) 400 / 299 @ 5900rpm (L99) The reliefs lower the compression ratio to 10. 2 liter LS3 V8 engine is currently produced by Chevrolet Performance as a crate engine, offering a peak output of 430 horsepower at 5900 RPM. Compression ratio Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons. 2L V-8 (LS3, L99) Application : SS Displacement (cu in / cc) 376/6162 Bore & stroke (in / mm) 4. To improve combustion efficiency, most LS pistons are a pure flat top design, but there are exceptions. The LS3 had a compression ratio of 10. LS7 engines contain a 7008 cc or 427. LS3 Valvetrain Specs; Lifter Style: Hydraulic Roller: Lifter Link Style: Plastic Lifter Tray: Lifter Body Diameter: 0. So, using this calculator: Engine Compression Ratio (CR) Calculator, you can figure out the compression. 62 inch (92mm) Vehicles Using the LS2 Engine Though the LS2 only spent a few years in the sun, the storied engine was featured in several factory applications. The engine specs and information listed here is for a stock LSA engine. The lighter hollow stem valves used in the LS3 can be installed in L99 heads to increase the rpm range. Pure ethanol max just under one Bar with careful planning, but yeah should take 20 psi on a fully engineered max effort methanol setup. of torque at 3,400 rpm; these are identical performance ratings as the equivalent variant of the 396. The modular motor’s averages were only slightly down from the LS which posted 433. To this end, LS1 has a compression ratio of 10. All volumes are entered in cubic centimeters. When I had the motor resleeved, they decked the block, and I used thicker intake valves; that on top of a few other very minute changes bumped my compression ratio up to 11. Here’s How to Build an Insane, 650. 86 inches) Higher compression ratio (10. 0:1 can rise to an effective ratio of 11. I built an LS3 stroker motor, but it ended up blowing up. 0:1 Compression Ratio - ZR1: 9. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped directly. 4:1, the ported ProComp heads and Texas Speed cam improved the output of the LS3 crate motor from. Effective Dome Volume: Use (-) for Dome and (+) for Dish. The LS3 V-8 is the base engine for the 2010 Corvette and the new Camaro SS. ** **The Australian vehicles use a different format for Vehicle Identification Numbers (VIN). The Gen III have 862/706 Gen III heads, and the Gen IV have 243/799 heads. You will have to deal with the MAP sensor. Stock, the LS3 produced 469 hp at 5,800 rpm and 465 lb-ft at 4,800 rpm. LS3-powered Corvettes edge out Camaro SS applications marginally in the horsepower department. The LS3 compression ratio is 10. The LS3 is a 6. The lighter hollow stem valves used in the LS3 can be installed in L99 heads to increase the rpm range. 7:1 Maximum rpm (recommended): 6600 Reluctor Wheel: 58X Great Mods for the GM LS3 Engine Modifying any engine type takes precision and skill to do correctly. 065 bore pushes this LS3 out to a whopping 416ci, for incredible low end torque. 2L, Aluminum Block, Car Engines ** A special dry sump version of the LS3 was used in the 2010-13 Corvette Grand Sport Coupe only. LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to >LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to. I then installed a set of CNC-ported L92 heads. 2L Engine Specs: Performance, Bore & Stroke, Cylinder. The LSA is a supercharged, Gen. 622 (92mm) LS3 Specialty Uses. For example, with a Roots-style supercharger, a static ratio of 8. LS ENGINE SUPERCHARGER TYPES AND HOW TO CHOOSE>LS ENGINE SUPERCHARGER TYPES AND HOW TO CHOOSE. The math indicates 6 psi would be okay at 12:1 (16. Upgrading the LQ4 and LQ9 Engines. GM Performance Parts LS3 Engine Build Part 3. 9 lb-ft average from 3,000 to 6,800 rpm. Liter V8 Small Block LS3 Engine. 006 out of the hole and using factory gaskets, it looks like compression would be bumped up to around 11. In the Camaro SS, the engine is rated at 426 horsepower (318 kW). Calculators, Charts, & Tools; Instruction Library; News; Tech Articles;. The intake - basically a stock LS3 intake, in front of the throttle body - very similar to a Camaro setup - a straight shot. Compression ratio: 10. Highest Static Compression ratio with Boost on 93 octane?. 7:1 Rocker arm intake p/n: 12569167. The LS3 is offered in. The compression ratio of the L99 motor is 10. The LS2 also featured an increased compression ratio of 10. LS7: Which Is The Best Engine For You?. 4:1, as the pistons have valve reliefs machined in the top halves of the pieces. Performance Consumers might favor the slight power increase in the LS3 over the L99, even though both engines demonstrate high performance values. Chevrolet LS3 Specifications Horsepower: 430/436hp @ 5,900 rpm (Standard/Dual-Mode Exhaust) Torque: 424/428 lb-ft @ 4,600. com LS1, LS2, and LS3 are all offered with a cast aluminum block and cast aluminum cylinder head. Regardless, supercharged LS3s can produce horsepower numbers pushing double the factory figure. 7:1, while the LS7 has a compression ratio of 11. The compression ratio of the L99 motor is 10. INTRO TO LS ENGINES & FORCED INDUCTION • LS Engine DIY>INTRO TO LS ENGINES & FORCED INDUCTION • LS Engine DIY. A dished piston was used with lower compression LQ4 engines while higher compression LQ9 employed a flat top. LS3 produces 426hp/408lb-ft tq compared to L99s 400hp/395lb-ft tq L99 camshaft is different -- having a little less duration and a little less lift, both of which give the engine a smoother idle. Your dynamic compression ratio is 8. Your dynamic compression ratio is 8. 3:1 with only 6 psi of boost, and to more than 15. LS3 Compression Ratio - Coupe, Convertible: 10. 1:1 Alternator: 50 Amps (idle), 120 Amps Maximum Cylinder Head Material: Cast Aluminum Exhaust Manifolds: Stainless Steel Main Bearing Caps:. The other engines, LY6 and LM7 is cast iron with a lower ratio. Consumers might favor the slight power increase in the LS3 over the L99, even though both engines demonstrate high performance values. LS3 Compression Ratio - Coupe, Convertible, Grand Sport: 10. Gen III/Gen IV LS Engine: Specs, dimensions, and. Discussing Compression Ratio And Pump Gas Compatibility. Chevrolet LS3 Specifications Horsepower: 430/436hp @ 5,900 rpm (Standard/Dual-Mode Exhaust) Torque: 424/428 lb-ft @ 4,600 rpm (Standard/Dual-Mode Exhaust) Compression Ratio: 10. 4:1 compression ratio,(vs about 10. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped. The most notable changes include: Larger cylinder bore (4. Despite dropping the compression ratio from 10. This short block is rated to 500HP Frankenstein CNC Ported LS3 Cylinder Heads Thompson Motorsports custom ground Camshaft Billet adjustable timing set GM MLS head gaskets ARP Head Bolts Trunnion Upgraded Rocker Arms Melling Select High pressure oil pump Thompson Motorsports high RPM lifter set GM lifter trays. 030 inch to increase compression and better airflow. The L99 and LS3 heads have rectangle intake ports. Heres How to Build an Insane, 650. The LS3 produced efficiency numbers of 1. Top Things You Should Know About the LS3 Engine – Autowise. Compression Ratio: 10. LSX Series Crate Engines / Chevy Performance Parts TRAX Starting at $22,100 EQUINOX Starting at $26,600 BLAZER Starting at $35,100 TRAVERSE Starting at $34,520 TAHOE Starting at $54,200 SUBURBAN Starting at $57,200 Build & Price View Inventory Accessories Parts Certified Pre-Owned UPCOMING BLAZER EV Sign up for updates EQUINOX EV. Despite dropping the compression ratio from 10. Our 281CC LS3 / L92 / L99 / LSA head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges as well. 2 liter LS3 V8 engine is currently produced by Chevrolet Performance as a crate engine, offering a peak output of 430 horsepower at 5900 RPM. Compression Calculator Simply fill in the form below to calculate your compression ratio The cc for the piston is entered as a positive number on a -cc Dish or Flat top piston and a negative number on a dome piston. 620 Compression Ratio: 9:1 Block: LSX Cast Iron with 6-bolt cross bolted main caps Crankshaft: Forged 4340-steel, LSX 8 bolt flange Connecting Rods: Forged Powdered Metal Steel. Ask Away! with Jeff Smith: Talking HP, Boost & Compression in …. 5:1 dynamic, with 10-11 psi boost, 550+ rwhp factory with no other mods on 93, +75 rwhp with water/meth. 2-liter engines, including the LS9 supercharged engine of the Corvette ZR1. This LS3 will be running a high 13:1 compression ratio and a 415 ci displacement, supported by clean-burning E85 fuel. Com Cams 101- Camshaft Q & A; Com Cams 101- Camshaft Q & A; LS Torque Specs & Sequence; LS Port Identification; Topics. Stock, the LS3 produced 469 hp at 5,800 rpm and 465 lb-ft at 4,800 rpm. But, the LY6 and LM7 are half the price of the. But, heres the confusing part, for this story, were not interested in some killer 14. Where is the power? I think two things - one, shaved heads giving about 11. Compression Ratio: 10. Cylinder Heads. Low usually means anything under 120 PSI (although the service manual says 100 PSI is the minimum). This short block is rated to 500HP Frankenstein CNC Ported LS3 Cylinder Heads Thompson Motorsports custom ground Camshaft Billet adjustable timing set GM MLS head gaskets ARP Head Bolts Trunnion Upgraded. The heads flow better and have thicker decks to maintain head gasket seal. There were several other changes between the LS2’s Gen IV block design, and the Gen III block design of the LS1. A long time ago 6:1 was considered High Compression. 622 stroke, 243 64cc heads, flat tops with -3. The factory LS3 chamber is 69. It originally had a compression ratio of 11. 9:1, while LS3 has the highest compression at 10. Performance In 1970, the L34 variant of the 402 could produce 350 horsepower at 5,200 rpm and 415 ft-lb. I built an LS3 stroker motor, but it ended up blowing up. Scroungers are known to CNC port the 862/706 heads to get them to. According to Kojima, their 4-inch stroke is the same as the factory LS7 and has no. But, LS3 intake and exhause will work. In factory form, the LS3 is rated between 415 and 430 horsepower depending on the application. Find Dealer Connect & Cruise Powertrain System Connect & Cruise Crate Powertrain Systems provide factory. Im reluctant to draw a line to the limits of compression vs octane. LS7 blocks may be oversized to about 4. In general terms, forced-induction engines are safer with compression ratios in the neighborhood of 8. With just the Mast cam, peak power increased to 533 hp, a gain of 64 hp, and the rpm at. Also note the coated rod bearing that is OE on both the LT1 and LT4. It’s based on the same platform as the LS2 engine, but it features several enhancements that make it more powerful and efficient. 7:1 Displacement: 376 cubic inches (6. The generally accepted estimate is an improvement of three to four percent per full point of compression. 622 stroke, 243 64cc heads, flat tops with -3. 3cc! Combining this volume with some milling will allow us to reach compression ratios of 15. The cam specs are 225/231 degrees of duration at 0. According to Kojima, their 4-inch stroke is the same as the factory LS7 and has no issues. Compression Ratio Calculator To enter a piston dome/dish volume, use a positive number for dome and a negative for dish. RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2. 927 Pins Effective Volume of +8. 7:1 LS9 Supercharger Pulley Ratio: 2. LS3 Compression Ratio - Coupe, Convertible: 10. If your compression ratio is 12:1 theoretically that means the compression is 12 times atmospheric pressure. The LS3 is offered in the Pontiac G8 GXP and is the standard V-8 engine in the 2010 Camaro SS. The LS3 heads will fit on any LS block with a minimum 4. It is also common to CNC port and/or mill them up to 0. , cam timing, altitude, and boost of PSI is 8. Graphically, this is what detonation looks like on a pressure trace. Compression ratio: 11. 2L small block engine used in GM performance cars between 2009 and 2017. Iron blocks may accept a further increase, but cylinder walls should first. 4:1, the ported ProComp heads and Texas Speed cam improved the output of the LS3 crate motor from 485 hp and 476 lb-ft of torque to 538. Scroungers are known to CNC port the 862/706 heads to get them to outflow. LS3 VS Coyote Budget Shootout Results: The Winner …. Iron blocks may accept a further increase, but cylinder walls should first be measured for thickness using an ultrasonic thickness gauge to verify the minimum available wall thickness. Compression Calculator Simply fill in the form below to calculate your compression ratio Bore: (diameter) in. The L99 engine has a slightly less. But with a supercharger, you’ll be better off keeping the compression ratio, conservatively, no more than 10:1. The LS3 compression ratio is 10. Keep in mind that if you plan to run forced induction, the static build compression ratio will dramatically increase at effective compression when boost is added. Max dynamic compression ratio on pump gas. If you are looking for a fuel-efficient engine, you want the higher compression ratio. 8:1: Hydraulic Lash Adjustment: Net lash design - lifter preload set by pushrod length: Piston: Cast aluminum, except: LS9 - OEM forged pistons: Piston Compression Height: LS1 - 1. Performance Consumers might favor the slight power increase in the LS3 over the L99, even though both engines demonstrate high performance values. 4:1 on unmilled L92s), and the camshaft being specd properly for my build. LS3 is all aluminum with higher compression ratio. Static compression ratio of 11:8:1. It originally had a compression ratio of 11. 7,535 Posts. Regarding weight, the LS7 is marginally lighter at 454 lbs, compared to the LS3s 466 lbs. In the Corvette it is rated at 430 horsepower (321 kW), or 436 horsepower (325 kW) when equipped with the optional dual-mode exhaust system (RPO NPP). L99, LS3, and LS7 have compression ratios of 10. A V-3 compressor fills the mounting brackets for V-1, V-2, V-4, V-5, and V-7 compressors. 006 out of the hole and using factory gaskets, it looks like compression would be bumped up to around 11. Discussing Compression Ratio And Pump Gas Compatibility>Discussing Compression Ratio And Pump Gas Compatibility. That is so because a higher compression ratio. Regardless, supercharged LS3s can produce horsepower numbers pushing double the factory figure. In general terms, forced-induction engines are safer with compression ratios in the neighborhood of 8. 9 lb-ft of torque from 4,000 to 7,800 rpm. But with a supercharger, youll be better off keeping the compression ratio, conservatively, no more than 10:1. LS3 Valvetrain Specs; Lifter Style: Hydraulic Roller: Lifter Link Style: Plastic Lifter Tray: Lifter Body Diameter: 0. The LS3 is filled with components designed for high performance and longevity. Compression Ratio Calculator. A crate LS3 can set you back about $8,000, but it comes with a satisfying 430 bhp and 424 lb-ft of torque. 2L, Aluminum Block, Car Engines. Despite dropping the compression ratio from 10. V-4 Series:a racing-intended compressor that Vortech claims is twice as efficient as a Roots blower at 12 pounds of boost. This makes the engine much more responsive at part throttle when the engine isn’t under boost. Output: 430 hp at 5900 rpm and 425 lb-ft of torque at 4600 rpm. Compression Ratio Calculator To enter a piston dome/dish volume, use a positive number for dome and a negative for dish. LS3 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More Posted 11/02/17 by OnAllCylinders Staff Last updated on 12/29/2021 The LS3 is a Gen. 3) : Total Displacement ccs : Socialize with Us. The LS3 is offered with the Hydra-Matic 6L80 six. I take it this is not a road car! Your boost compression ratio with that cam and chamber setup is too high for pump gas at 2 psi and with additives 4-5 psi. 4:1, the ported ProComp heads and Texas Speed cam improved the output of the LS3 crate motor from 485 hp and 476 lb-ft of torque to 538. A 4-Corner Steam Kit can reduce hot spots that can cause #7 ring end gaps to butt. The engine specs and information listed here is for a stock LS3 engine. 5 Tips For Turbocharging An LS Engine: Shane Whalley. LS3 vs LS7 Engines: Which Is Better and What’s The Difference?. LS3 Engine Specs: Performance, Bore & Stroke, …. L99 PCV system is different having its oil separators in the valve covers rather than down in the valley like the LS3. Even with a significant valve relief, we were able to end at an effective volume of +8. Masts LS3 head castings are available in three different trim levels for. The LS3 compression ratio is 10. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and Isuzu got some LS love. The L99 and LS3 heads have rectangle intake ports. Top Things You Should Know About the LS3 Engine – Autowise>Top Things You Should Know About the LS3 Engine – Autowise. OFFICIAL 2010 Camaro Specifications Fully Released by GM>OFFICIAL 2010 Camaro Specifications Fully Released by GM. To improve combustion efficiency, most LS pistons are a pure flat top design, but there are exceptions. compression ratio calculated using a stock ls3 head and. 2 liter LS3 V8 engine is currently produced by Chevrolet Performance as a crate engine, offering a peak output of 430. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped directly. 7:1 Connecting rods p/n: 12617570 (powdered metal) Crankshaft p/n: 12597569 (nodular iron) Displacement: 376 cid (6. LS3 aluminum block cylinder bore oversizing is limited to about 4. LSX376-B15 PN 19299306 Specs Power: 450HP at 5,900 rpm, 444 lb-ft. 5:1) More aggressive camshaft profile. It’s designed to fit the Chevy Corvette, Camaro SS and G8 GXP. This means that merely changing from a 9:1 to a 10:1 static compression ratio on a 400 hp small block would be worth as much as 16 horsepower. This makes the engine much more responsive at part throttle when the engine isnt under boost. Chevy LS3 Engine Specs LS Family = Gen. 620” Compression Ratio: 9:1 Block: LSX Cast Iron with 6-bolt cross bolted main caps Crankshaft: Forged 4340-steel, LSX 8 bolt flange Connecting Rods: Forged Powdered Metal Steel. 622” (92mm) LS3 Specialty Uses. LS3 is all aluminum with higher compression ratio. LS3 engine specifications. No doubt the hemi is capable of more. The cam specs are 225/231 degrees of duration at 0. 200 Valve Reliefs The Definitive Max Effort NA LS3 Piston! Add Line2Line Coating * These coatings reduce operating clearances and thus improve efficiency. LSX376-B15 PN 19299306 Specs Power: 450HP at 5,900 rpm, 444 lb-ft. L99, LS3, and LS7 have compression ratios of 10. The LY6 and LM7 can be ran like the LS3 if you change the bore, heads, intake, and exhause. Stock, the LS3 produced 469 hp at 5,800 rpm and 465 lb-ft at 4,800 rpm. 25:1 compression ratio. The factory LS3 chamber is 69. I checked both PTV clearance and pushrod length. 9:1, while LS3 has the highest compression at 10. 0:1 and greater with relative ease. Your static compression ratio is only part of the equation for your engines ability to run on lower octain fuels. 622 stroke, 243 64cc heads, flat tops with -3. 62x 113) Youll want to mill them to keep the compression ratio up. I was talking the other day to Scott at King motorsports and he claims to have street Hondas running 12:1 with 93 octane. I was told it was somewhere between 12. If you do, make sure you get a wide split cam or youll make so little power, youll go backwards when you mash the throttle. The LS3 engine is rated and advertised with 422 brake horsepower and 408 lbs/ft of torque. Ls3 Compression RatioIn comparison, the LS7 motor provides a compression rating of 11. LS3 Valvetrain Specs; Lifter Style: Hydraulic Roller: Lifter Link Style: Plastic Lifter Tray: Lifter Body Diameter: 0. Keep in mind that if you plan to run forced induction, the static build compression ratio will dramatically increase at effective compression when boost is added. To this end, LS1 has a compression ratio of 10. Coyote averages through the rev range were 419. 0:1 Alternator: 50 Amps (idle), 120 Amps Maximum Cylinder Head Material: Cast Aluminum Cylinder Block Material: Cast Aluminum Engine Oil Capacity - Coupe, Convertible: 5. Buy Now: GPI – Track Attack LS3 High Compression Dome Piston and Rods Package (5th Gen Camaro / C6 Corvette). Pistons: hypereutectic aluminum. However, the LS3 had a 4. The LY6 and LM7 can be ran like the LS3 if you change the bore, heads, intake, and exhause. The 11cc increase in chamber volume. The factory LS3 chamber is 69. LS7: Which Is The Best Engine For …. LS Family = Gen. There are many Aftermarket Heads available. A boosted engine creates more heat, more compression and as the engine gets hotter the rings start to close and if. How to Choose Performance Pistons for Gen IV LS Engines. That is so because a higher compression ratio allows an engine to utilize more energy generated by the combustion process. These have VTEC so the DCR is variable as well. Run with the stock LS3 heads, the stock LS3 produced 493 hp at 5,700 rpm and 484 ft-lbs of torque at 4,800 rpm. The other engines, LY6 and LM7 is cast iron with a lower ratio. This means that the valves will be closer to the cylinder walls. 2L LS3 Supercharger Guide. 5:1 compression ratio allows for safe and reliable performance on 91 octane pump gas. But, LS3 intake and exhause will work. The LS7 engine of the Corvette Z06 has 11:1 compression, the LS3 is at 10. LS3 is all aluminum with higher compression ratio. 2L) Maximum rpm: 6600 Piston p/n: 19165089 Piston type: Hypereutectic aluminum Recommended fuel: 92 octane Reluctor wheel: 58-tooth Rocker arm ratio: 1. Assuming that the pistons come. What is common, if you have a very high mileage engine, is low compression across the board. Designed to work with LS3 Style Heads Dome Piston High Compression 12. It’s meant to fit the Corvette Z06 and Camaro Z28. The LS3’s compression ratio is 10. Ring Gap: When boosting an LS engine you will want to open up the ring gap. Compression Calculator Simply fill in the form below to calculate your compression ratio ;> Bore: (diameter) in. These heads can be CNC-ported to improve on flow and milled for higher compression. 7:1 Maximum rpm (recommended): 6600 Reluctor Wheel: 58X Great Mods for the GM LS3 Engine Modifying any engine type takes precision and skill to do correctly. Where the typical LS3 chambers measure 70 cc, the big-chamber, CNC-ported LS3 heads from Procomp featured chambers that checked in at a whopping 81 cc. combo will use a 228r cam, ported 243s, and ported LS2 intake & tb, ngk tr55ix plugs. The 8th digit is NOT the engine code in an Australian VIN code. The higher the rating is, the more energy thats generated during the combustion process, allowing a better temperature without as much fuel. LS3 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs. GPI Cylinder Head Porting Service. Block And Heads Material LS Engine Block. shooting for 470ish rwhp daily driver. INTRO TO LS ENGINES & FORCED INDUCTION • LS Engine DIY. The LS3 is filled with components designed for high performance and longevity. The reliefs lower the compression ratio to 10. The LS3 V-8 is the base engine for the 2010 Corvette and the new Camaro SS. The car is tuned and is running on 93. V/P (Volume to Pressure Index) is 141 See more Reply Save Like xDetroitMetalx. The LS3 engine has a displacement measuring 6162cc or 376. LS3 Vs LS7: How The Two Small. 9:1), but Id love to hear if someone has done it. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the. 0L Iron 370ci Performance Stock Series Long Block w/ LS3. When I had the motor resleeved, they decked the block, and I used thicker intake valves; that on top of a few other very minute changes bumped my compression ratio up to 11. A crate LS3 can set you back about $8,000, but it comes with a satisfying 430 bhp and 424 lb-ft of torque. He advises not to use more than a 4-inch stroke due to piston instability and clearance issues with block for standard applications. I then installed a set of CNC-ported L92 heads from GM Performance (supplied by Gandrud) that flowed nearly 350 cfm (up from 315 cfm). L99 camshaft is different — having a little less duration and a little less lift, both of which give the engine a smoother idle. L99, LS3, and LS7 have compression ratios of 10. So, another words other than the weight difference. 2L V8 engine that was introduced in 2008. For use with 4 in (100 mm) and larger bores, they allow for over 600 hp (450 kW) naturally aspirated. 2 Liter V8 Small Block LS3 Engine. Where the typical LS3 chambers measure 70 cc, the big-chamber, CNC-ported LS3 heads from Procomp featured chambers that checked in at a whopping 81 cc. Less space around the valve can limit the air flow. Compression Ratio : Total Displacement (in. com>LY6 vs LS3 differences??. This LS3 will be running a high 13:1 compression ratio and a 415 ci displacement, supported by clean-burning E85 fuel. 3:1 Horsepower (hp/kW)– 300/224 @ 6400 rpm * Torque (lb-ft / Nm @ rpm) – 273/370 @ 5200 * Recommended fuel – regular unleaded Max engine speed – 7000 Fuel economy (auto trans) – 26 hwy (est) 6. The LS3 engine has a displacement measuring 6162cc or 376. LS3 Compression Ratio - Coupe, Convertible, Grand Sport: 10. 7:1 Compression Ratio - Z06: 11. The math indicates 6 psi would be okay at 12:1 (16. Compression Ratio: 10. 5:1 compression ratio that could make an engine detonate to death as easily as it can make it sing. 5:1 with the stock gaskets again. LS3 produces 426hp/408lb-ft tq compared to L99’s 400hp/395lb-ft tq, although the L99 features lower compression. LS3-powered Corvettes edge out Camaro SS applications marginally in the horsepower department. The L76/L92/LS3 cylinder heads use 2. 25mm: Valve Spring Style: Beehive: Valve Spring Color: Natural. Compression ratio: 11. LS3 Engine Specs. Starting from the bottom up, we used the Coyote’s stock crankshaft along with a set of Manley Performance connecting rods (PN 14042R-8) and forged pistons (PN 598010-C). worked on everything from spaces stations to nuclear submarines N novaguy73 Registered Joined Jun 1, 2004 97 Posts #14 · Apr 2, 2005 re absolutlyi run 11. So, using this calculator: Engine Compression Ratio (CR) Calculator, you can figure out the compression. The LS7 engine of the Corvette Z06 has 11:1 compression, the LS3 is at 10. The LS3 engine is rated and advertised with 422 brake horsepower and 408 lbs/ft of torque. 8:1 Recommended Fuel: Premium pump Maximum Recommended rpm: 6500 Reluctor Wheel: 58X Balanced: Internal Compare LSX Engines. There are many aftermarket cylinder heads available. 5:1 compression ratio. 2009 Chevrolet Corvette Specs and Options. The LS3 engine has a displacement measuring 6162cc or 376. Increased power means more heat in the pistons, so all Gen V engines now use oil squirters aimed at the back side of the piston to control crown temperatures. 25:1 compression ratio. Your dynamic cranking pressure is 167. Some websites say 93, some say 105+. Compression Calculator Simply fill in the form below to calculate your compression ratio The cc for the piston is entered as a positive number on a -cc Dish or Flat top piston and a negative number on a dome piston. If you are building for fuel efficiency, choose the highest compression ratio. com > Engine / Drivetrain /. The LS3’s compression ratio is 10. Block is cast aluminum with six-bolt, cross-bolted main caps. The LS3 produced efficiency numbers of 1. When researching on what octane fuel I should be using I am getting mixed answers. Masts LS3 head castings are available in three different trim levels for. 7:1, and even the original LS1 engine had a 10. How To Do A Compression Test (GM 4. 7: Rocker Offset: Intake Rocker, 6. LS3 aluminum block (4. LS3: Which Engine Is Best For You?. 7:1 Rocker Arms: investment-cast, roller trunnion Rocker Arms: investment-cast, roller trunnion Rocker Arm Ratio: 1. The LS3 block not only has larger bores than the LS2, but a strengthened casting to support more-powerful 6. In factory form, the LS3 is rated between 415 and 430 horsepower depending on the application. 1:1 compression on 89 octane. Consumers might favor the slight power increase in the LS3 over the L99, even though both engines demonstrate high performance values. 620” Compression Ratio: 9:1 Block: LSX Cast Iron. Those numbers are pretty impressive from the crate engine, but the LS3 offers durability and extreme power potential, creating a gearheads dream. LMAO-you are one of my favorite people on the board. You are browsing camaro5 Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5. The aluminum block is filled with a sturdy reciprocating assembly that combines with L92-type rectangular-port heads to deliver a 10. Rocker Arm Mounting Style: Pedestal: Rocker Arm Style: Die-Cast, Roller Fulcrum: Rocker Ratio: 1. mm Cylinder Head Volume: cc in. The LS3 has a compression ratio of 10. I built an LS3 stroker motor, but it ended up blowing up. Quote: Originally Posted by sixty9fordkiller. But, the LY6 and LM7 are half the price of. If you are building for fuel efficiency, choose the highest compression ratio. Introducing our Brand New High Compression Dome Piston and. The LSA engine that the LSA supercharger is designed for has a compression ratio of 9. A V-3 compressor fills the mounting brackets for V-1, V-2, V-4, V-5, and V-7 compressors. How to Choose Performance Pistons for Gen IV LS …. 2:1 (determined by gasket and milling) Use 6. 2L engine has an advanced 58X crankshaft position encoder to ensure that ignition timing is accurate throughout its operating range. Between 2007 and 2017, the LS3 was used in. Gen III/Gen IV LS Engine: Specs, dimensions, and …. If your engine has reached this point, its also smoking from the quart of oil its burning every few days. LS ENGINE SUPERCHARGER TYPES AND HOW TO CHOOSE. 040 gasket with what they call a little lunati cam (223 intake duration) and a stock intake manifold with the rod mod like. Compression Ratio Calculator To enter a piston dome/dish volume, use a positive number for dome and a negative for dish. you know what, Rick Crawford created a mean street/strip proven setup for the G8 guys that consists of stock LS3 heads ported and milled to 64cc on 6. Everything You Want To Know About The GM Gen V / LT Engine. The generally accepted estimate is an improvement of three to four percent per full point of compression. 607-inch lift, and a lobe-separation angle of 115 degrees. 7:1 compression ratio. Run with the stock LS3 heads, the stock LS3 produced 493 hp at 5,700 rpm and 484 ft-lbs of torque at 4,800 rpm. Filter Results Edelbrock 46720 Part Number: 350-46720 Edelbrock GM LS 416 Crate Engine Long Block Only Crate Engine 416 LS. This seems very confusing but it is because even though it is a -cc on the piston, those same ccs are gained in cylinder volume. LS3 produces 426hp/408lb-ft tq compared to L99s 400hp/395lb-ft tq L99 camshaft is different -- having a little less duration and a little less lift, both of which give the engine a smoother idle. 0L truck engines use the same combustion chamber. The LT1 static compression ratio is an amazing 11. to increase compression and better airflow. Related: 5 LS3 Vs LS7: Fuel System via Mecum Further still, the LS3 and LS7 engines provide the same fuel system; a sequential fuel injection configuration. 5:1, but LS engines have much greater “squeeze” from the pistons. Compression Calculator Simply fill in the form below to calculate your compression ratio The cc for the piston is entered as a positive number on a -cc Dish or Flat top piston and a negative number on a dome piston. 1:1 Alternator: 50 Amps (idle), 120 Amps Maximum Cylinder Head Material: Cast Aluminum Exhaust Manifolds: Stainless Steel Main Bearing Caps: Forged Steel. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped directly. Compression Ratio Calculator To enter a piston dome/dish volume, use a positive number for dome and a negative for dish. (atmospheric pressure compressed to 1/12th its uncompressed volume) At sea level there is 14. Find Dealer Connect & Cruise Powertrain System. 2006 GTO Black/Black M6 Charlotte: Ported PRC LS3 Heads / Flowtech AK-47 cam (23x/23x. Engine Preset Bore Diameter Stroke Length Chamber Volume Piston Dome/Dish Volume Deck Clearance Gasket Thickness Gasket Bore Cylinders Calculate Compression Ratio - Total Displacement. The LS3’s compression ratio is 10. Chevrolet LS3 Specifications Horsepower: 430/436hp @ 5,900 rpm (Standard/Dual-Mode Exhaust) Torque: 424/428 lb-ft @ 4,600 rpm (Standard/Dual-Mode Exhaust) Compression Ratio: 10. ShoddyHog said: L92 heads on a stock cubed LS2 sucks. 0:1 Rocker Arms (P/N 12579615 int): Investment-cast, roll trunnion Rocker Arms (P/N 12579617 exh): Investment-cast, roll trunnion Rocker Arm Ratio: 1. If this was a normally aspirated engine, you could crank the compression up to 13:1 or perhaps more. If this was a normally aspirated engine, you could crank the compression up to 13:1 or perhaps more.