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  • Diesel to petrol

    Hey guys just bought a 1980 diesel mk1 golf just wonder how to change it to petrol
    What are the biggest things to change
    Thanks


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  • #2
    The motor

    Boom tish
    Here all night folks, remember to try the Chicken



    You can adapt things like the tanks but new fuel pumps, the Mk1 doesn't have any electronicary of a moden common rail, all mechanical. The petrol motor wou put in will actually be more complex as it has an ignition circuit
    What motor are you looking at?

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    • #3
      Originally posted by Notso Swift View Post
      The motor
      Exit, stage left.
      1978 MK1 2.0 16v http://www.vwwatercooled.com.au/foru...-46488-70.html
      1991 MK2 GTI 2.0 8v, white (RIP) and it's red replacement http://www.vwwatercooled.com.au/foru...gti-42078.html
      1997 MK3 CL http://www.vwwatercooled.com.au/foru...ml#post1292061
      2001 & 2002 Bora 4motion. http://www.vwwatercooled.com.au/foru...st-123823.html

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      • #4
        Hahah thanks




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        • #5
          Probably 1.8


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          • #6
            It's pretty straight forward.

            Motor with suitable fuel system, carby , efi etc.

            Electric fuel pump if your motor doesn't have a mechanical one. You'll need a fuel filter to suit as well. Ditch the diesel one.

            Wiring for the ignition system. If you're using a points dizzy you need a 12 coil of the NON resistor type. You can run that off the wire that goes to the diesel pump now.

            EFI will need all of it's stuff wired up if you go down that path. Remember pumps etc will need mounting and wiring up. Likewise with K-Jet.

            Exhaust will bolt up to an 1800, 2.0L too if you're lucky.

            Radiator hoses should be the same, there might be some messing about with the heater hoses.

            Sensors should just move across.

            Here's one I did earlier http://www.vwwatercooled.com/forums/...mk1-38301.html
            79 MK1 Golf Wreck to Race / 79 MK1 Golf The Red Thread / 76 MK1 Golf Kamei Race Car
            7? MK1 Caddy
            79 B1 Passat Dasher Project
            12 Amarok

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            • #7
              It's pretty straight forward.

              Motor with suitable fuel system, carby , efi etc.

              Electric fuel pump if your motor doesn't have a mechanical one. You'll need a fuel filter to suit as well. Ditch the diesel one.

              Wiring for the ignition system. If you're using a points dizzy you need a 12volt coil of the NON resistor type. You can run that off the wire that goes to the diesel pump now.

              EFI will need all of it's stuff wired up if you go down that path. Remember pumps etc will need mounting and wiring up. Likewise with K-Jet.

              Exhaust will bolt up to an 1800, 2.0L too if you're lucky.

              Radiator hoses should be the same, there might be some messing about with the heater hoses.

              Sensors should just move across.

              Here's one I did earlier http://www.vwwatercooled.com/forums/...mk1-38301.html
              Last edited by Peter Jones; 18-11-2015, 05:58 AM.
              79 MK1 Golf Wreck to Race / 79 MK1 Golf The Red Thread / 76 MK1 Golf Kamei Race Car
              7? MK1 Caddy
              79 B1 Passat Dasher Project
              12 Amarok

              Comment


              • #8
                I'ts worth replacing a bunch of stuff while the motor is out.

                Diesel isn't too friendly to rubber parts so you might need new mounts and hoses.

                Do the shift linkages while the motor is out too, much easier that way.

                You need the correct engine mount for your new motor too. (The one near the pulleys.)

                The diesl one can be modifed if you can't find one to suit.
                79 MK1 Golf Wreck to Race / 79 MK1 Golf The Red Thread / 76 MK1 Golf Kamei Race Car
                7? MK1 Caddy
                79 B1 Passat Dasher Project
                12 Amarok

                Comment


                • #9
                  Will be run side draft webber
                  Will have a 5 speed
                  What the wiring do I need to convert that
                  Will I need a new fuse box
                  Just not to shore
                  Any help is good help
                  Thanks


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                  • #10
                    For the electrics all you'll need to run is an electric petrol pump and a coil. Both need to be wired to your existing fuse box off a connection that only has power when the ignition is turned on. Make sure you wire them off a fuse that can handle 20 amps and on the side that won't have power if the fuse blows.

                    You don't want a high pressure pump otherwise it's going to flood your carby.
                    1978 MK1 2.0 16v http://www.vwwatercooled.com.au/foru...-46488-70.html
                    1991 MK2 GTI 2.0 8v, white (RIP) and it's red replacement http://www.vwwatercooled.com.au/foru...gti-42078.html
                    1997 MK3 CL http://www.vwwatercooled.com.au/foru...ml#post1292061
                    2001 & 2002 Bora 4motion. http://www.vwwatercooled.com.au/foru...st-123823.html

                    Comment


                    • #11
                      Thanks


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                      • #12
                        Run a carter rotary fuel pump, much better than the facit style pumps that are noisy.. Fuel pressure regulator for 2.5 psi suits weber, dellorto carbs. The factory engine block mounted fuel pump cant flow enough fuel for anything above a downdraft 32/36 carby.
                        I would recommend electronic ignition as well for reliabillity and a little more power. Points wear quickly.
                        sigpic
                        Mk2 GTI 2 door 1.9l 8v turbo 1st mk2 1st engineered water vw nats 09
                        Mk1 twin eng twin turb
                        scirocco gti 2.1l 16v turb 6spd
                        Audi A4 B5 1.8t

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                        • #13
                          This is cool, a mate has a diesel and he was wondering a similar thing.... forwarding on now...

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