Adjustable FPR?

Discussion in '96-04 - 2V Specific' started by 68mustang5.0, Jul 24, 2007.

  1. 68mustang5.0

    68mustang5.0 Active Member

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    I noticed that my motor has a bolt on FPR :dancing6:


    What kind of good adjustable FPR is there for the mod motors?

    What kind of advantages can i see with an adjustable FPR?

    Thanks! O0
     
  2. sn97gtnyg

    sn97gtnyg Member

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    what does it look like?
     
  3. 68mustang5.0

    68mustang5.0 Active Member

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    The Fuel Pressure Regulator ( FPR) if you car is a 96-97 the FPR is on the drivers side fuel rail. its bolted on, towards the back of the motor.

    On a 98, the FPR is on the passenger side fuel rail. its welded on.
     
  4. 19mustang95

    19mustang95 Legend

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    you can change your timing, and using the FPR you can lean out or richin the amount of fuel.
     
  5. Jrgunn5150

    Jrgunn5150 Legend

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    I never had a need for a FPR personally, everything you can do with it, can easily be done with an Xcal, Diablosport, etc.
     
  6. Thomas_W

    Thomas_W Well-Known Member

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    negative. you can NOT change your fuel pressure w/ an X-cal.. and if your running HI hp, boost levels and Large injectors, you need an adjustable FPR.. if your not running those things, you dont need to waste your money on it.
     
  7. Jrgunn5150

    Jrgunn5150 Legend

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    You are correct, I can't change my fuel pressure with my Xcal. I can however change the pulsewidth, witch pretty much equates to the same thing.
     
  8. Thomas_W

    Thomas_W Well-Known Member

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    yea sorta... but not really... more fuel, but your also raising your duty cycle which will max out the injectors if you extend the pulse width to much. just changing FP "pushes" more fuel thru that pulse and doesn't change the duty cycle..

    so yea... but not really O0
     
  9. Jrgunn5150

    Jrgunn5150 Legend

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    Right, but my basic point is that the thread author, who seems to be a NA bolt on guy, doesn't need a adjustable FPR.
     
  10. scarface

    scarface Guest

    aeromotive makes a nice one
     
  11. 68mustang5.0

    68mustang5.0 Active Member

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    Thank you david. lol
     
  12. Thomas_W

    Thomas_W Well-Known Member

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    my aeromotive started leaking 3 weeks after i bought it.

    Replaced it with a kirban and never had a problem with it.
     
  13. scarface

    scarface Guest

    mine lasted for 3 years with no issues, and still is going strong for the new owner...there good and bad in every bunch.
     
  14. Dalamar

    Dalamar Legend Retired Staff SN95 Supporter

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    My regluator is prettier than yourse! :hammer:
     
  15. quickstang_1994

    quickstang_1994 Well-Known Member

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    The AFPR will be overridden buy the computer because it is set to a AF ratio so the computer must be changed. When you up you fuel pressure your computer closes the pulse width. The only reason to up fuel pressure is to make up for small parts lol (injectors).