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  1. #1
    Boost addict hotbird's Avatar
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    Tuning in a x charger and 42lb Bosch injectors. RRFPR

    I just got my 06 rxt up and running. Brand new motor.

    Mods are;

    x charger
    fizzle external intercooler
    bosch 42 injectors
    RRFPR
    15/21
    intake grate
    Wideband gauge

    On the run today I was running rich at idle 11.0 slightly lean at cruising speed 14.6 and rich at wide open 11.0 Only did short wide open's due to breaking in the engine. I leaned it up some till I got 12.5 at idle and 12.2 at wide open.

    My question is it OK to run lean and part throttle (cruise speed) 14.7-15 to 1???
    as soon as it gets into the boost it goes right down to 12ish to 1.

    Thanks!


  2. #2
    Having Fun jp1300r's Avatar
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    Is that a stock Ecu? I know guys don't like the 50lb Delphi, but they work great on a stock Ecu. Anyway your afr are ok. I just don't like my idle that rich.

  3. #3
    Boost addict hotbird's Avatar
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    yea stock ecu

  4. #4
    monaroman76's Avatar
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    Hotbird - I'd try a couple of things. First, use your RRFPR without the reference line attached and see how your AFR's look. It is also worth trying the RRFPR with the reference line attached to the throttle body (so that it only senses boost, not vacuum).

  5. #5
    Gus13letter's Avatar
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    What RRFPR are you using? I ran that setup with Aeromotive regulator with 50lb base and was at 12 idle, 13.5 mid, 11.5 wot. You should be able to dial it in. If you have a cheap reg then that can be your problem, to where it is not rising 1:1.
    I personally wouldnt run it at 15 mid.

  6. #6
    Boost addict hotbird's Avatar
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    Quote Originally Posted by Gus13letter View Post
    What RRFPR are you using? I ran that setup with Aeromotive regulator with 50lb base and was at 12 idle, 13.5 mid, 11.5 wot. You should be able to dial it in. If you have a cheap reg then that can be your problem, to where it is not rising 1:1.
    I personally wouldnt run it at 15 mid.
    I am using this one;
    http://www.4-tecperformance.com/inde...oducts_id=1307

    I think if I remove the reference line it would run way to rich on the bottom and lean on top?? Worth a try I guess but seams to me it would do that.

    I think moving it to the throttle body on the supercharger side would probably work. How do I hook it up though?

  7. #7
    Boost addict hotbird's Avatar
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    I do a lot of cruising at mid throttle 30-50 mph and that's the range where it runs very lean.

    Is there any way to add more fuel just at mid range? short of v tech or CMD ??

  8. #8
    Boost addict hotbird's Avatar
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    anything else I can try?

  9. #9
    HardmanGT's Avatar
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    Your options are pretty much BEGI, Rude controller or CMD

    If you disconnect the reference line it will be even more rich at idle and leaner up top. Your mid range may not change a whole lot.

  10. #10
    Boost addict hotbird's Avatar
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    Quote Originally Posted by HardmanGT View Post
    Your options are pretty much BEGI, Rude controller or CMD

    If you disconnect the reference line it will be even more rich at idle and leaner up top. Your mid range may not change a whole lot.

    Can you explain how the begi works? I have not heard of it before.

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