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I have a b16a2 that is spooled (just to be brief if you want more info you can get it) My idle fuel pressure is at 47 psi stock fuel reg. which i know is a little rich but the fmu if, working properly should only increase fuel pressure according to boost 12:1 10:1 and so on. my buddy is using the aem. He is using the bigger oriphis to keep the fuel psi down during idle and the fmu compensates during boost conditions. hope this helps.
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