fuel question,

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  • custom e30
    Grease Monkey
    • Nov 2009
    • 347

    #1

    fuel question,

    i am curious to know what the fuel pressure is at idle? i just installed a rising rate regulator and i need to know the stck fuel pressure at idle so i can do the math and make the correct fuel pressure at ide for my 36lbs injectors
  • EthirtyIS
    Wrencher
    • Feb 2011
    • 270

    #2
    im showing 38lbs after the regulator.... what are you using for fuel delivery?
    Proud Owner and Operator.
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    • jaywood
      R3V Elite
      • Jul 2010
      • 4528

      #3
      What rrfpr did you get? The manual should say what psi to have it at at idle. Remember, you're going to want to get the pressure from the feed hose (bottom hose on the stock fpr). I have mine idling at ~46 psi with the signal line disconnected.

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      • custom e30
        Grease Monkey
        • Nov 2009
        • 347

        #4
        i got a rrfpr on ebay, no manual, i have 36lb injectors, even if it is set to 30psi the car is still way to rich at idle, so i took it down to 20psi and runs good

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        • jaywood
          R3V Elite
          • Jul 2010
          • 4528

          #5
          What are you using to judge the psi? Do you have a built in gauge on the rrfpr, or an aftermarket gauge that goes in-line with the fuel? You have a wideband, right?

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          • custom e30
            Grease Monkey
            • Nov 2009
            • 347

            #6
            its built into the gauge, no wide band yetm, in 2 weeks

            Comment

            • Hey_You
              E30 Modder
              • Nov 2009
              • 963

              #7
              You sure it's a Rising Rate Fuel Pressure Regulator? Or did you just get an Adjustable Fuel Pressure Regulator?
              85' 318i ~The Bronze Bomber (FrankenM10 with a Forced Future :wgaf:)

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