I just bought a 1999 Camaro SS and I'm kinda new to this whole car/mod thing. Just out of curiosity, whats the differece between my LS1 that comes stock and the regular LS1 that I can buy and install? Only about 30 horsepower (cause it says the crate LS1 is 350 hp)?

 

I think the crate motor is tested with headers, open intake, and limited or no accessories mounted...and your Camaro is rated with all the F-Body specific exhaust, accessories, and intake system. I believe the cam, heads, compression ratio, etc. is the same.

 

agreed...

it is possible that it has the LS6 intake as well, yours has the LS1 intake...bout 5-7hp on a stock motor.


also realize that the LS1 motors were under-rated at 305hp.

MANY were dynoing nearly that much at the wheels making them more like 335-340hp at the crank.

 

As stated above, the crate motor may have been tested with a different set of parts. I'd be willing to bet it has the updated components like 28.8lb injectors, LS6 intake, different PCM tuning, and a slightly smaller cam that was altered due to the removal of the EGR system. There may be a few other things here and there, but those should be the brunt of the power differences. Either way, the aftermarket provides pleanty of opportunity to fix these short comings.

 

They are all basically the same. GM just advertised the F-Body having less power because they didn't want people buying them over Corvettes for performance reasons. But we did anyway