Twin Carbs on a GS?
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  1. #1
    1000+ Posts alan moore's Avatar
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    Default Twin Carbs on a GS?

    I admit I usually don't go over to the "dark" side and visit the Cit forum. BUT

    I was talking to a long time owner of a GS 1220, in my suburb, who had clocked up 750 000 Klm in this car, and has kept it in above average condition. He asked how you might extract some more Hp from it. The motor currently is in good cond. I mentioned that a pair of 40 IDF Webers might be of assistance, as I have fitted them to two Alfasuds many years ago to good effect.

    Of course the usual port job and cams would not hurt either. Has anyone played with these air cooled masterpieces?

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  2. #2
    Fellow Frogger! Paul Smith's Avatar
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    Hi Alan,

    Adam Christie (son of Denton @ European Autocare) has a GS with twin Webers from an Alfasud - they have had to do a lot work to get the manifold right - too much petrol seems to be the problem with standard cams. He has also built a 1400 engine, with special cams, but I don't think it is installed.

    Personally I would be looking at a modern injection system, with computer control etc - upfront cost a bit more, but the joy of being able to drive a GS when it was cold without warming the poor thing up for ten minutes!!!

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  3. #3
    Local Tyrant gibgib's Avatar
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    I remember a red GS with birotor front guards & sporty velour having twin webers (GS ones). Last time I saw this car was at Continental cars with all the front off about 3 years ago.
    I'd imagine it being a mongrel to set up & keep running right.

  4. #4
    Real cars have hydraulics DoubleChevron's Avatar
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    Default

    Yep,

    with those huge intake manifolds an injection conversion would be BRILLIANT. I wonder if the old Camira conversion would work on these (Damian ??).

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  5. #5
    1000+ Posts alan moore's Avatar
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    I admit injection would be better at a cost, although the Camira Delco system is cheap, just that you need someone to program and burn the eproms. The main thing still is to get rid of the long, skinny inlet manifold. The cost of throttle bodies for injection would be the main concern. Perhaps K series BMW bike ones could be adapted, or maybe the carbs from a type 3 VW may be easier.
    Forgive my ignorance, but do the cams operate buckets or rockers?
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