i was going to add a turbo kit soon........just run about 8psi......how much hp would that add to a 170hp prelude si?........and what would it cost for parts and labor.........money is no issue. hoping to get 350hp.

 

This is a hard question to anwser. It really depends on what turbo and the set up that you are running. A lot more than psi is a factor in what will get the numbers you are trying to achieve. Exhaust size ,mani, turbo? Psi could never tell you what hp you will achieve without other considerations.

I will assume that this is an h23 and has a million miles on it....have you done a pressure and leak down test? Does the motor need necessary internal work done?

If so then the price will just keep on going up. Give some more information on what kit and setup. Then go from there... post is WAY TO VAGUE to conclude!!!