[Steve C.]

Gen III (3) LS 500+ Horsepower NA Street-Racer Buildup

The engine tested here used the aftermarket components shown in this chapter, but engines with stock short-blocks have made similar power. The key components to make this power include the GMPP CNC-ported cylinder heads (which yield a 10.5:1 compression ratio), the GMPP Showroom Stock camshaft or similar aftermarket cam (less than 0.600 inch lift), 1- 3/4- inch primary long-tube headers, 38-lb/hr injectors, F.A.S.T. controller, and open-element air cleaner. Increasing the compression to 12:1 would increase the horsepower curve about 20 to 30 hp over the last 1/3 of the power curve, but you’d need to run 100 octane gas to prevent the engine from detonating itself to death.

https://www.lsenginediy.com/gen-iii-...racer-buildup/

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