G-8VXWWTRHPN Fuel Pump pressure question - VWWatercooled Australia

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Fuel Pump pressure question

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  • Fuel Pump pressure question

    Gidday.
    Can anyone tell me if the mk2 GTI fuel pump for the RV engine (digifant II) is 3 bar or 4 bar??
    The number of the pump is 191 906 090.

    Cheers,
    Wade
    -1990 Mk2 GTI 5-door with AMK 20vt (260hp @ wheels)
    -Arrow/Rotax 125 TAG X1E Go Kart
    sigpic

  • #2
    i think its 4 bar but the fuel regulater will drop it down...i know the perfance high pressure regs are 3.5 bar! (so i would guess the the fuel pump would pump harder and the regulater will drop it down)
    Velly
    '91 2.0 8v GTI

    Originally posted by DubSteve
    I have wood thinking about you

    Comment


    • #3
      You need to consider flow, as much as pressure Wade. 4BAR to supply a 100hp motor, is a fair bit less fuel than 4BAR to run a 300hp motor.

      Cheers

      Gavin
      optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

      Comment


      • #4
        Gavin,

        Got myself an adjutable regulator, and looking at taking it from the stock 3bar to 3.5 possibly more once I add the 735i AMM. A 4 bar fuel pump is good to _____ hp?

        Cheers,

        James

        Comment


        • #5
          Ok thanks.
          I'm a bit unsure what to do. Do i leave the old mk2 pump setup there and feed the AMK with that? Or is it too weak and should i get the VR6 setup?

          I still have the old S3 pump, and was hoping maybe i could put the actual S3 pump in the mk2 housing??? I'm really stuck???!!!
          -1990 Mk2 GTI 5-door with AMK 20vt (260hp @ wheels)
          -Arrow/Rotax 125 TAG X1E Go Kart
          sigpic

          Comment


          • #6
            i'm running with a vr6 tank and in-tank pump at the moment. i wouldn't worry so much about a vr6 pump under-fueling, but perhaps the original digi pump might struggle a bit.

            considering the injectors for the stock 8v are less than 200cc, and the tt 225 injectors ( same as AMK?) are something like 315cc, flow rate might be an issue with the stock pump.

            i'd fit the vr6 pump just to be sure.

            edit: dont think the s3 pump will fit in housing, never tried, who knows?
            87' MK2 GTI
            13' MK7 TDI

            Comment


            • #7
              Wade, go through ETKA. See what tank is in the G60 Golf GTI PG engine code, if that has the same part number as one for a digifant Golf PB engine code. You will be game on with the VR6 pump. I broke the pump in my G60 and used a VR6 one as a replacement.

              Gavin
              optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

              Comment


              • #8
                just get it running with what you have Wade, then mess about with the pump if it isnt up to scratch.. the Std K jet will flow enough to get it idling at a bare minimum.
                Lots of MK 1 Scirocco's...

                If it aint a MK 1 then it must be a donor car ??

                Cheers,
                Grant...

                Comment


                • #9
                  I forgot it was Kjet, easy to get a Bosch 044 I think it is and bolt in in the same place as the original. You need that wideband so you know it hasn't gone lean. Be a shame to wreck the motor over a fuel pump.

                  Gavin
                  optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

                  Comment


                  • #10
                    No my car is a 1990 GTI with digi II, NOT kjet.
                    I'll leave it as is and see if its leaning out.

                    cheers for the advice guys
                    -1990 Mk2 GTI 5-door with AMK 20vt (260hp @ wheels)
                    -Arrow/Rotax 125 TAG X1E Go Kart
                    sigpic

                    Comment


                    • #11
                      You can probably go with a VR6 pump if you need it. Please be vigilant when you first drive it!

                      Gavin
                      optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

                      Comment


                      • #12
                        mhmm.. if possisble, do an simple test how long it takes to fill a litre or something to get a gauge of how much it flows. alternatively, just etka the mf.

                        get a wideband on that asap too. getting the correct tune is geniuniely impossible without
                        87' MK2 GTI
                        13' MK7 TDI

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