Done Alot Of Reasearch On The Motor,, With A Gt-42 Or Similar Sized Turbo And About 8 Psi Most Fbofys Dyno About 575 Ish To The Wheeles On A Bone Stock Motor(with Fuel Upgrades Obviously). Seen Some Guys Runnin As Much As 10 Psi On 91 Ocatne Gas,,,,,usually Controlled By The Stock Pcm