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Ackbar00 · 02-28-2004, 07:55 PM

If it is 12:1 and you have 6psi of boost this causes the FMU to raise fuel pressure to 72psi, right ?
Well, It raises 12 PSI for every pound of boost, so it would add 72psi to your static pressure. But this is WAY too much, Try a adjustable FMU, that way, you dont have to screw with disc.

Is this 72psi in addition to the factory regulators 38-40psi ? Yes

Also, what size injectors would be recommended for a stock cylinder head 302 running 6 psi,GT40 intake, 65mm throttle body, 73mm MAS, 1.7 roller rockers, 15/8 equal length shorties, and dynomax exhaust?If you are going to run a FMU, just stick with the 19#'rs. You be fine with at 6#'s

Should I ditch the FMU and go with a tune ? What is everyone's opinion ?
That is always the best approach.. But I am runnig 30# injectors with a BEGI FMU. Should make over 400 RWHP when it is all said and done.

02-28-2004, 07:55 PM	#2
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	Re: FMU Ratios and injector sizes If it is 12:1 and you have 6psi of boost this causes the FMU to raise fuel pressure to 72psi, right ? Well, It raises 12 PSI for every pound of boost, so it would add 72psi to your static pressure. But this is WAY too much, Try a adjustable FMU, that way, you dont have to screw with disc. Is this 72psi in addition to the factory regulators 38-40psi ? Yes Also, what size injectors would be recommended for a stock cylinder head 302 running 6 psi,GT40 intake, 65mm throttle body, 73mm MAS, 1.7 roller rockers, 15/8 equal length shorties, and dynomax exhaust?If you are going to run a FMU, just stick with the 19#'rs. You be fine with at 6#'s Should I ditch the FMU and go with a tune ? What is everyone's opinion ? That is always the best approach.. But I am runnig 30# injectors with a BEGI FMU. Should make over 400 RWHP when it is all said and done. __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"