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  1. #1

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    GP1300r Which impeller..?

    2003 gp1300r
    Mods are
    milled head
    ride plate
    intake grate
    seal kit

    I was a little confused after reading at which impeller to get 13/19 concord or 13/20 setback concord..?

    any other opinions topend vs acceleration..?


  2. #2
    If you have the head milled, buy the 05 pump and get a dynafly. You can find both on here used if you search around

  3. #3
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by yfz-450 View Post
    2003 gp1300r
    Mods are
    milled head
    ride plate
    intake grate
    seal kit

    I was a little confused after reading at which impeller to get 13/19 concord or 13/20 setback concord..?

    any other opinions topend vs acceleration..?
    with your current pump a 13/19 concord should work... you really need an 87mm nozzle to get the best out of that combo

    or go with the HO pump, 85mm nozzle (the one you have currently) and a Dynafly 14/20 impeller

  4. #4

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    Quote Originally Posted by WFO View Post
    with your current pump a 13/19 concord should work... you really need an 87mm nozzle to get the best out of that combo

    or go with the HO pump, 85mm nozzle (the one you have currently) and a Dynafly 14/20 impeller
    So the 13/20 setback will be to much.? how much gains is the 87 nozzle gonna give.? topend or holeshot.?
    BTW I ride lakes with minimal chop..

  5. #5
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    Quote Originally Posted by yfz-450 View Post
    So the 13/20 setback will be to much.? how much gains is the 87 nozzle gonna give.? topend or holeshot.?
    BTW I ride lakes with minimal chop..
    the 13/20SB may be a little much, unless you add more motor mods... the nozzle is better all around

  6. #6

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    Quote Originally Posted by WFO View Post
    the 13/20SB may be a little much, unless you add more motor mods... the nozzle is better all around
    What other motor mods do you suggest.?

  7. #7
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    Quote Originally Posted by yfz-450 View Post
    What other motor mods do you suggest.?
    Offset keyway, reeds or reed stuffers... but you will need a fuel controller... you really should add a controller with a milled head

  8. #8

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    if i lose the milled head for the time being and put the stock one on until i find a fuel controller,, will it turn a ho pump with a 14/20..? with only a d plate

  9. #9
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    Quote Originally Posted by yfz-450 View Post
    if i lose the milled head for the time being and put the stock one on until i find a fuel controller,, will it turn a ho pump with a 14/20..? with only a d plate
    probably so... most new DFs are closer to 13/19

  10. #10

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    ok thanks for the info ,

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