How much for the seal? Speaking of boost, 17-17.5psi at 4500ft is probably pretty safe. I know a person who was pushing 19psi with only exhaust. You probably understand that the more boost you pump into your engine, means the more force you are putting on you pistons and seals. So you are defenitly wearing out the engine faster with higher boost, which is why I am satisfied with 14.5 psi at 4500ft.
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