The L99 is a 400-horsepower engine while its fraternal twin--LS3--is rated at 422 hp. 4) valves sizes, exhaust and intake , max lift. Hi , i'm looking for specs and info in the 4.3 V8 L99 engine like: 1) engine technical specs, dimensions ,etc. There is even a TSB for the problem. yes it is a known issue with the L99's. 5) what parts can be interchange with the 350. Well, would you believe that not one of their new L99 cams gained less than 100 horsepower over the stock bumpstick? Performance Specifications. So we’re sure by now you are wondering just how much power we are talking about, exactly. Their new Stage 1 VVT-1.2 L99 cam gained exactly 104 horsepower and 48 lb-ft of torque over the stock stick. Latest TSB number is TSB #10-06-01-007D I know of at least 6 people here in NC alone that have had to get the lifters changed out on one side or both, Camaro SS with L99 from 2010 thru 2014 model years. The LS based small-block engine is the primary V-8 used in General Motors' line of rear-wheel-drive cars and trucks. Compression Ratio: 10.7 : 1: Horsepower Rating: 426-436 hp. 3) port flow numbers for the heads, combustion chamber size. and other a host of other vehicles with AFM engines. With both VCT and AFM, it's harder to modify in … Our L99 Stage 1 camshaft will be a great choice for those looking to use their factory torque converter and want the best streetability possible. Chevy LS3 Engine Specs LS Family = Gen. 4, 6.2L, Aluminum Block, Car Engines. Intro to the LS3 and L99 ; Chevy LS7 Engine Specs ; Intro to the L92, L9H, and L94 ; I don't know the VIN. https://itstillruns.com/difference-between-lt1-l99-8626649.html I want to know the engine specs, dammit! 2) what cars and years the engine came in. You read that right. Which LS engine do I have? 6.2L (376 CI) L99 (Auto Trans) The 400hp/410-lb-ft L99 is used in V8 Camaros with an automatic. CASTING # YEAR: CID: MAINS: NOTE: 10125327: 92-97: 350: 2 OR 4: LT1/LT4, Corvette blocks normally 4-bolt main: 10168588: 94-96: 265: 2: L99 4.3L, B-Body Print. Introduced in January 1995, it is a "clean sheet" design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small-block V-8 that preceded it as the basis for GM small-block V-8s. History of the LS engine, which includes the LS1/LS6, LS2, LS3/L99, LS4, LS7, LS9 and the LSA. Our camshafts are the result of endless engine dyno testing on our SuperFlow 902 engine dyno using a factory GM L99 engine with factory cylinder heads. The four major differences are the AFM, cam, variable valve timing, and 10.4:1 compression for the L99 … The difference lies in the valvetrain; as the short-block, heads, and intake manifold are identical. Cams gained less than 100 horsepower over the stock stick that not one of their L99! Of torque over the stock stick = Gen. 4, 6.2L, Block! 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