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  1. #1

    GP1200 return jet

    Can anyone recommend a return jet size for a stock GP 1200? (non PV)

    I drilled the returns to help reduce the pressure on the check valves as they keep buckling and flooding the engine.


    Alot of guys say watch piston wash but I don't have a o-ring head. Other say pressure test it but don't give a pressure range it should be within. Any help would be nice.


  2. #2
    Happily Self-Employed WFO's Avatar
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    105

  3. #3
    Thanks thats the number I had in my jetting book just wanted to double check as i cant recall where i got that from.

  4. #4
    Digging around alittle bit more, there seem to be a bunch of guys say 60 and a bunch say 105 haven't seen much of a range. Can anyone enplane why such a large gap with no variation in between?

  5. #5
    Have tou solved it? I think nobody knowsl.....

    I have a superjet 701(200 and drilled te return because it was plugged.
    I'am also looking for the best size to put in the fuel restrictor, but i think the only solution is to try and maby measure it by a preasure meter.

  6. #6
    Happily Self-Employed WFO's Avatar
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    jeez how many times to you have to see the number to believe??? its a 105 on 65U carbs and 95 on I bodies

    ... and you guys wonder why so many tuners dont post here anymore

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