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hmm... thanks for the advice guys.. anyone else?

hmmmmmmmmm Well thanks for the replys guys.. We had no idea it would jump to 21 lb. didnt really think the turbo was that stout. We put everything back to the way it was. One other thing, why would his car be making 9 -10 anyways then?

Hey this is my first post.. but my friend has a mazdaspeed protege. It has full exhaust, but other than that I believe is stock. It usually makes about a max of 9 -10 psi boost. Is this normal? Just wondering how much boost you can run on stock bottom end. Some of us was hangin out and got...