Join Date: May 2007
Location: Parlin, New Jersey
The fuel pressure regulator with vacuum (idle or cruising speed) is at about 35psi and without vacuum (WOT or under a load) is at about 45psi.
vacuum changes the spring pressure inside the regulator which regulates the fuel, so I would assume that pressure (turbo or supercharger) would bring the fuel pressure up beyond 45 to compensate for the boost.
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ASE Master Technician and Advanced Level Specialist.
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1994 Thunderbird, 4.6 V8, PI heads, SVO Blower, 8# pulley, 2.5 duel exhaust, 4R70W, MarkVIII converter, Mark VIII differential, Trac-Loc, 3.73 gears, H&R 1.5 lowering springs, bilstien rear shocks and SC front struts.