What is the maximum amount of power that can be produced by a Chevy s/b engine, yet still pass emissions?

It can be any Chevrolet small block engine.

But, the compression has to be low enough to still be able to use pump gas.

What is the most hp that can be produced by a Chevy small block engine, and yet still be able to pass emissions tests?
Sorry, I didn’t explain the other "limitations" or parameters for the hypothetical engine.

I did indeed want the engine to be naturally aspirated- meaning, no Nitrous, no supercharging, and no forced induction of any sort.

Thank you for your responses!
Sorry, I didn’t explain the other "limitations" or parameters for the hypothetical engine.

I did indeed want the engine to be naturally aspirated- meaning, no Nitrous, no supercharging, and no forced induction of any sort.

Thank you for your responses!

well, is this motor naturally aspirated, or forced induction? is this including nitrous, or is this on a stock motor? i know of twin turbo Ls1’s (5.7L/350 aluminum block) that make horsepower in the 1200 range on pump gas. but your possibilities are endless with a fully built, stroker, forced induction, and nitroused motor.

3 Responses to “What is the maximum amount of power that can be produced by a Chevy s/b engine, yet still pass emissions?”

  1. well, is this motor naturally aspirated, or forced induction? is this including nitrous, or is this on a stock motor? i know of twin turbo Ls1’s (5.7L/350 aluminum block) that make horsepower in the 1200 range on pump gas. but your possibilities are endless with a fully built, stroker, forced induction, and nitroused motor.
    References :

  2. you can get 350 with 325 horse and still pass-i have had pontiac 350 with 375 horse it still passed emissions
    References :

  3. Have seen and heard of sb’s with over 500 hp. Its all in how you build it. This is without superchargers, turbochargers and ram air. Look at the new Corvettes!!! 505hp out of a sb. All they did was bore it out a little bit more. The 08s are rumored to abround 600hp out of the same small block.
    References :

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