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Message: <blockquote data-quote="Lee12609" data-source="post: 741586" data-attributes="member: 12415">with stock 3.60 pulley i see 7psi non intercooled, just bought a 3.33, any clue what i'll be at hoping for 9-10psi.... no powerpipe, o/r x pipe and straight through mufflers, BONE STOCK motor.i would think a powerpipe and 3.33 would be more than 6psi especially through a stock exhaust, i'd say you have/had a leak. was you running the IAC hose to the powerpipe like its supposed to be, if so there is your leak. i went through this when i installed my kit, i had to put a check valve in the IAC hose, even with a new IAC it doesnt close off at WOT allowing boost to go back to the inlet. i was barely seeing 2psi at 6000rpm, with the check valve i get 7psi on a stock vortech kit.... even though it seems like every couple days i end up with a leak somewhere now. nothing worse than going to the track and only making 2psi......</blockquote>