Geeez Diesel Freak.....I ran a FASS 95 at well over 500hp, and with a 15 lb spring, couldn't pull pressure down lower than 13psi. I now have a FASS 150 with a 20 lb spring and can't pull pressure below 17 psi at WOT. Both sets of numbers are with the FASS sucking through a Racor Nomad fuel heater just before the FASS and a 2-micron filter.
Almost sounds like you may have a problem.
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03, 4X4, QUAD, LWB, Standard Output, 47RE, 3.73, ATS TC/VB, DTT Trans/Billet, Flex Plate, TorqLoc, RAD, Twins, Snow, Hot Cp3, Injectors, Cam, 315s, 8,200 lbs wet.
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