putting twin webers on

hi. after some peoples help on here ive decided to put twin webers on my 1.8 8v carb cabrio. but can anyone tell me what i will need to get other than the webers? if i put twin 40's on, what will be the mpg? many thanks. :dontknow:

Inlet manifold, throttle body covers & throttle cable kit - shouldn't be too different from standard until you open both chokes up, which you will !!  8)

Hi…

I'll try and help with a bit more.

You'll def need an inlet manifold, mounting plates and hardwear to mount the carbs and a twin carb linkage kit for a start. On top of that you'll need an electronic fuel pump, filter and pressure regulator, also some ram pipes and some kind of air filter.

I'm not sure what throttle body covers are???

The conversion for the 8v carb has a few issues to deal with. One big one is that the standard inlet manifold has water heating, the inlet for twins doesn't. I got round this issue with some metal putty and bit of extra tube over the hole left in the metal water pipe.

For the fuel pump you'll need to have some kind of electronic system in place as the mechanical job fitted by VW won't do the job. To run the pump correctly a GTI fuel pump relay would be needed.

Hope this helps a bit dude :mrgreen: