Got a question, I'm looking to build a 383 LT1 that will put out at least 400 horsepower naturally aspirated and pass smog in California? Does anyone have any expereince, or is even posible?

 

Very possible. 500hp out of a heads/cam 383 is not all that difficult.


400hp would be really mild for a 383. You should be able to do 450 and pass smog easily with the right parts.

I should be running a heads/cam 383 by September. I'll let you know how it goes.

 

That is very possible. Good luck with your project.

 

400 flywheel HP or 400 rear wheel HP?

 

What Fred said^^^ 400 rwhp is a pretty big number N/A, and its just a number....Dynos can be manipulated to say a lot of things...

--Alan