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  1. #1
    tvtyme2000's Avatar
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    2007 gpr nozzle diameter?

    I put a solas 14x20 dynafly prop on.I read on the R&D site that without a 87mm nozzle it will reduce performance.I cant remember where but I think I read that the later model gprs had 87 mm nozzle or is it 85.I just did a speed run yesterday and at 90degrees and light chop did 67 on gps.77 on dream-o-meter.I know i need a real tach for true rpms.R&D says without 87 nozzle it will be 6850.My recent mods
    tunnel reinforcement
    14x20 dynafly
    pump seal kit
    d plate
    ejk at pre programmed settings
    r&d plate
    r&d grid


  2. #2
    Ski Hacks MG's Avatar
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    I'd say you need a grate with the PPK, Solas and Plate.

  3. #3
    Happily Self-Employed WFO's Avatar
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    concord uses 87mm, dynafly uses 85mm

    03+ GPRs came with 85mm

  4. #4
    tvtyme2000's Avatar
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    So I am good.Thanks WFO.I have R&D grate.Guess I need to play with ejk settings.I just stepped the sponsons.Going to test run tomorrow.I was hoping for 70gps.Also hoping to hit the lottery LOL

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