RS2 - 3.8 Bar Bosch Fuel Pressure Regulator

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  • UUUdirs2newcastle
    S2Forum Maniac
    • Apr 2008
    • 655
    • Country: England

    #1

    RS2 - 3.8 Bar Bosch Fuel Pressure Regulator

    My FPR seems to have been squashed on the top, did i read somewhere that people would ‘modify these by squashing/tapping them with a vice, to make them 4 bar ? (Or am I going mad? )
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  • newsh
    S2Forum Obsessed
    • Aug 2003
    • 16226
    • Country: United Kingdom

    #2
    Correct

    S2 Coupe 3B Project


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    • LSG
      S2Forum Maniac
      • May 2010
      • 898
      • Country: United Kingdom

      #3
      Originally posted by newsh
      Correct
      Flippin eck Mr John. Which one . he's going mad or he's right about squashing them. I guess your correct was squashing them. So squashing it would increase the spring pressure inside the unit. A little hit and miss but I guess if it works happy days .

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      • fish
        S2Forum Fiend
        • Aug 2007
        • 2335
        • Home: United Kingdom Current: Sweden

        #4
        Old skool mods. Even Dahlbäck used to do tjat back in the day. (i know, i had two S2,s modified by him. Done in the 90,s and both had squashed FPR, s)
        Audi 80 Competition -94 Daily driver

        www.garaget.org/fish for more pic´s of my cars

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        • UUUdirs2newcastle
          S2Forum Maniac
          • Apr 2008
          • 655
          • Country: England

          #5
          Ah Jesus, so I may ‘actually’ need a 4.0 Bar FPR? Or more?

          I have just bought a brand new Bosch 3.8 bar FPR to make sure I had the right fuel pressure, and to rule out my missfire issue, but I guess now I need to squash the new one. Hahahahahahah

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          • fish
            S2Forum Fiend
            • Aug 2007
            • 2335
            • Home: United Kingdom Current: Sweden

            #6
            What is done to your car powerwise? Are ypu still on OEM coils? My S6 developed a sudden missfire ocasionaly, then it turned into a fulltime 4cyl ordeal. Tried bloody everything. Incl swapping imjectors. Turns out, i have a dodgy wire in one of the connectors for one of the power output stages...
            Audi 80 Competition -94 Daily driver

            www.garaget.org/fish for more pic´s of my cars

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            • newsh
              S2Forum Obsessed
              • Aug 2003
              • 16226
              • Country: United Kingdom

              #7
              Originally posted by UUUdirs2newcastle
              Ah Jesus, so I may ‘actually’ need a 4.0 Bar FPR? Or more?

              I have just bought a brand new Bosch 3.8 bar FPR to make sure I had the right fuel pressure, and to rule out my missfire issue, but I guess now I need to squash the new one. Hahahahahahah
              What software is in the ECU?

              S2 Coupe 3B Project


              Ur quattro restoration

              S2 Avant

              Boost is the new rock and roll!
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              • UUUdirs2newcastle
                S2Forum Maniac
                • Apr 2008
                • 655
                • Country: England

                #8
                MTM Software, Kim Collins did the car in 1996 I think. Twas a 360, then Kim upgraded It to a 380.... that same year.

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                • UUUdirs2newcastle
                  S2Forum Maniac
                  • Apr 2008
                  • 655
                  • Country: England

                  #9
                  If I buy a new 3.8 bar Fuel Pressure Regulator, and I decide to ‘squash it’ to make it a 4 bar pressure, how do you know how much to squeeze it?

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                  • robo
                    S2Forum Fiend
                    • Aug 2004
                    • 2086
                    • Home: Poland Current: England

                    #10
                    Originally posted by UUUdirs2newcastle
                    If I buy a new 3.8 bar Fuel Pressure Regulator, and I decide to ‘squash it’ to make it a 4 bar pressure, how do you know how much to squeeze it?
                    I think you can buy 4 bar fuel regulator.
                    sigpic_________
                    Rob

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                    • newsh
                      S2Forum Obsessed
                      • Aug 2003
                      • 16226
                      • Country: United Kingdom

                      #11
                      Originally posted by robo

                      I think you can buy 4 bar fuel regulator.
                      Certainly, 4 Bar would be a standard ABY reg.

                      S2 Coupe 3B Project


                      Ur quattro restoration

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