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  1. #1
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    R-3 ecu fuel pressure ?

    What is the setting for the fuel regulator at idle on the R/D R-3 ECU ?


  2. #2
    gordon lasiter #328's Avatar
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    what wheel are u running?
    are u using the oem injectors?
    i have the c5 wheel with oem injectors and my fuel pressure is 52lbs at idle.
    with the c3 i was at the same fuel pressure but, at static.
    this was with the powershot.
    i am gonna check the afr without the poweshot and see what my fuel pressure would be.
    probably gonna get bigger injectors ! maybe!

  3. #3
    Addicted Member 5001craig's Avatar
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    Yep... Need an LC-1 at the minimum to know what your AFR's are.

    And not just at idle. WOT is important.

  4. #4

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    is the fuel pressure altered then with the reflashes ???.

  5. #5
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    Im trying to run the H-1 wheeel with R-3 just cant boost over 15lbs because of my BOV opening up. I just added the riva fuel regulator
    for more fuel and right now have OEM injectors -might go to bigger if i need them. before I ran the C-3 wheel and it ran perfect at 80 mph. ok just did the math the stock injectors can take 8000 rpms and 18 lbs of boost and that is maxing out the duty cycle at 65 lbs of fuel pressure which is 348 hp from the motor any more then that and not enough fuel. I will choke down my nozzels to keep rpms below 8000 untill I get bigger injectors . the extra 500 rpm and 2 lbs of boost is 50 hp making for a total of 398 hp at 8500 with the H-1 wheel

  6. #6
    hdlefler's Avatar
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    I bought a set of injectors from Jim if you are interested.

  7. #7
    SHOBiz's Avatar
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    Quote Originally Posted by Big brother View Post
    Im trying to run the H-1 wheeel with R-3 just cant boost over 15lbs because of my BOV opening up. I just added the riva fuel regulator
    for more fuel and right now have OEM injectors -might go to bigger if i need them. before I ran the C-3 wheel and it ran perfect at 80 mph. ok just did the math the stock injectors can take 8000 rpms and 18 lbs of boost and that is maxing out the duty cycle at 65 lbs of fuel pressure which is 348 hp from the motor any more then that and not enough fuel. I will choke down my nozzels to keep rpms below 8000 untill I get bigger injectors . the extra 500 rpm and 2 lbs of boost is 50 hp making for a total of 398 hp at 8500 with the H-1 wheel

    I was way over duty cycle on the oem injectors a year ago at 16 psi and 8500 rpm. Unless MoTeC is wrong.

  8. #8
    gordon lasiter #328's Avatar
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    what size of injectors?

  9. #9
    hdlefler's Avatar
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    rated at 570cc

  10. #10
    Addicted Member 5001craig's Avatar
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    Quote Originally Posted by razzie View Post
    is the fuel pressure altered then with the reflashes ???.
    I believe the only way to add fuel pressure is with a fuel pressure regulator that over-rides the stock system.

    I installed a Riva FPR (running it static) and it was not hard to install other than figuring-out how to work the connector.

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