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Thread: Fuel Pressure Regulator

  1. #1

    Fuel Pressure Regulator

    What is the difference in fuel pressures between a '90 w/30# injectors and 94/95 w/36# injectors? Is it necessary to change the fpr when upgrading injectors? How much "range" (in pressure) is available if you go to an adjustable fpr? The car will have a 255 lph pump.



  2. #2
    Join Date
    Apr 2002
    St. Charles, MO

    Both are set at 39-40 psi. It isn't necessary to change fuel pressure settings especially if you have a tuner or re-burnable chip. Back when I had 38# injectors without a tuner, it required increasing the fuel pressure to around 43-44 psi to prevent bogging at launch.

    If your just switching to 36# injectors, I don't think you need to do anything else except recalibrate the MAF.

    Last edited by David Neibert; 01-30-2003 at 10:01 AM.
    1991 SC AOD 4.2..2.3 Whipple..........10.910 @ 125.61
    2016 SRT Challenger Hellcat.............750 rwhp 720 rwtq

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