Ok, so I have been reading a lot on the topic. Now I have another question... REALISTICALLY is 4psi boost too much for a stock 250? I am thinking the compression ration is about 8.5:1?!

I also have a friend who suggested the volvo turbo (from a volvo 240). He said they max out about 5-6psi and are used in tons of applications. Also, he mentioned that volvo guys use a turbine off of a 350zx?! which allows for about 18psi boost.

Thoughts?