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  1. #1

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    Anbody try an 84mm pump nozzle on a Superjet?

    Just wondering if anyone had tried an 84 mm pump nozzle on a Superjet. Looking at a metal one to replace our deformed plastic one, but its been bored to 84mm. Don't mind a bit more thrust, but do not want to give up any top end. We do have a highly modified 760 twin carb in the SJ.
    Last edited by LT1GMC; 07-30-2007 at 11:00 AM. Reason: Grammar and spelling


  2. #2
    cheatin' piston popper addicted's Avatar
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    usually boring the nozzle helps the holeshot at the expense of the top end, unless you are running an AAT. I don't have an SJ yet, but I would say that with that motor you could go with the bigger nozzle and just pitch the prop up to get your top end where you want it, and still have the low end.

  3. #3
    JonnyB's Avatar
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    I have 85mm on my SJ with a highly ported 62T Case and 64X Cyl and I can't hold on real long when its at its top speed

  4. #4

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    Thanks for the replys, I just noticed that the plastic Superjet nozzle is about 84mm but with a big bump/blister on the ID for the bilge siphon. The stock Blaster nozzle is metal, no blister/restriction other than the siphon tube, but its only about 80-81mm. I didn't want to give up anything going to the smaller ID, but don't want to lose top end by being too big.

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