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  1. #1

    Base rate for rrfpr?

    Any suggestions on what to set the Base rate on a riva rrfpr? Currency running et127 wheel with riva pro series ecu and 50lb bosh injectors? I running it static, just trying to smooth it out as running lumpy as hell low end and mid range on the hose. I understand to monitor afr's ect just looking at what people would start at?
    Enjoy the weekend!


  2. #2
    hill160881's Avatar
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    Adjusting the fuel pressure without a gauge is will be risky. I am about to do the same. I plan to adjust it for around 12.2:1 at wot and see where it falls on the low side. If it is to lean I will connect the vac/boost hose before the throttle body so it does not pick up vacuum and only boost.

  3. #3
    Water4fire's Avatar
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    Your ET 127 is on par with a stock X SCer. You need to set base pressure at 58psi. and leave it alone. Your AFR will be perfect. You are running external IC? Correct?

    The best set up IMO for a Riva ECU was Riva ECU, Riva 50lb injs., Riva Valvetrain upgrade, External IC, and a solas 15-20r prop. You will be at 79+mph on a RXP 76+on a RXT.

  4. #4
    I am running external cooler, 58lb is what it's running now and it's rich as hell, may bump it down to 50lb and work up from there

  5. #5
    Water4fire's Avatar
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    Yes ofcoarse it is rich as hell I just read you have Bosch injs. Rivas were Delphi so you have wrong injectors but are good one you just need to lower fuel pressure. Try 48ish and see.

  6. #6
    Water4fire's Avatar
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    Oh it's because the Bosch flow so much more then then delphis riva spec'd for the riva ecu.

  7. #7
    Yep that's the case, ordered 50's unseated of 48's by mistake! Oh well. Will be adding x charger and big wheel soon anyway

  8. #8
    Vern's Avatar
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    The Bosch 50s are just too much ... either run the Riva/Delphi 50s or get some Bosch 48s. The 48s will still be a little rich, but you can adjust base pressure a bit and watch AFR to get them pretty close.

  9. #9
    Just installed th rrpfr and afr is going in tomorrow, what afr should I shoot for from idle to wot?

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