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  1. #1
    philip_gpr's Avatar
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    Any chance the GPR injectors are the same as the SHO injectors ?

    Any chance the GPR injectors are the same as the SHO injectors ?

    If yes could the R&D replacement SHO injectors be used on a GPR ?

    http://www.rd-performance.com/newPro...yamaha/sho.asp


  2. #2
    OEM GPR injectors are a hi impedance injector, 13-14 ohm, and have a flow rate of 60gph. They are some of the highest flowing, hi impedance injectors on the market.
    If the impedance and physical dimensions are the same, and i think they are, the OEM GPR injector will work as a hi perf replacement injector for the SHO engine, and have a higher flow rate than the R&D racing replacement injectors listed on that page.

  3. #3
    Hydrotherapy's Avatar
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    Quote Originally Posted by philip_gpr View Post
    Any chance the GPR injectors are the same as the SHO injectors ?

    If yes could the R&D replacement SHO injectors be used on a GPR ?

    http://www.rd-performance.com/newPro...yamaha/sho.asp
    phili,

    have you maxed out you EFI controler

  4. #4
    philip_gpr's Avatar
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    my buddy has maxed out the controller on his 1390, in my case I am looking for a solution to use with my 1530

  5. #5
    walbro 255 inline pump..but to use it u need to make a fuelrail with a return line and a fule pressure regulator...
    danny

  6. #6
    Hydrotherapy's Avatar
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    Quote Originally Posted by danny1496 View Post
    walbro 255 inline pump..but to use it u need to make a fuelrail with a return line and a fule pressure regulator...
    danny
    so the pumps maxed out not the injectors

  7. #7
    philip_gpr's Avatar
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    does the OEM set-up regulate fuel pressure?

  8. #8
    OEM pump deadheads at the pump at 43-45 psi.. Raising fuel pressure up to 70 psi maximum will increase flow of injectors quite a bit..25 psi increase yeilds 10 gal per hour/100cc increase in fuel flow.
    At that rate, using an OEM GPR injector, at 70 psi will flow around 700cc/70 GPH..Thats a lot of fuel, cant imagine you needing more than that..

  9. #9
    Hydrotherapy's Avatar
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    Quote Originally Posted by rossnemo View Post
    OEM pump deadheads at the pump at 43-45 psi.. Raising fuel pressure up to 70 psi maximum will increase flow of injectors quite a bit..25 psi increase yeilds 10 gal per hour/100cc increase in fuel flow.
    At that rate, using an OEM GPR injector, at 70 psi will flow around 700cc/70 GPH..Thats a lot of fuel, cant imagine you needing more than that..
    ats good news for those near maxed out with 1390 builds..

  10. #10
    Hydrotherapy's Avatar
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    Quote Originally Posted by philip_gpr View Post
    my buddy has maxed out the controller on his 1390, in my case I am looking for a solution to use with my 1530
    philip only asking cos i have a genuine interest but what you going to gain from going EFI on your monster rather than i assume your current carb set up....

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