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Jeff Chambers · 10-10-2005, 08:43 PM

24#'ers won't satisfy a healthy 331 for very long. I've tuned two nice 331 combos recently and one was pegging 30# at 5500 rpm and the other was at 90% duty cycle at 6000rpm. They're making 380rwhp and 360rwhp, respectively. On a return-style system, if your fuel pressure begins to fall off with RPM, then the fuel system isn't up to the task.

10-10-2005, 08:43 PM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Fuel pressure ? 24#'ers won't satisfy a healthy 331 for very long. I've tuned two nice 331 combos recently and one was pegging 30# at 5500 rpm and the other was at 90% duty cycle at 6000rpm. They're making 380rwhp and 360rwhp, respectively. On a return-style system, if your fuel pressure begins to fall off with RPM, then the fuel system isn't up to the task. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"