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  1. #1
    o uncola o's Avatar
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    Cool Using an RRFPR and aftermarket charger without a wideband for tuning...

    I was wondering if anyone has "shot from the hip" and just used an RRFPR and went off of other people's AFR numbers. I do not have a wideband to check my AFRs. I do have a RRFPR and a nice new Minirude.

    I was planning on running the MiniRude with 42lb injectors ansd setting base pressure at 60 psi (better rich than lean) and using the reference line.

    Is my plan going to blow up my 4-tech? Anyone else "wing it" with their AFRs?

    I don't own a wideband and I am using an addicted exchaust without a J-pipe. I don't know where I could plumb the AFR sender in...

    Thanks everyone.


  2. #2
    83.0 @ 8400 jhill19's Avatar
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    Don't risk blowing your motor up. you can have your exhaust manifold tapped for an o2

  3. #3
    geowelsh's Avatar
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    I would look for an exhaust manifold that's tapped for an a/f sensor and do it right... That is the only way you will know all thy money you spent is getting the proper amount of fuel...

  4. #4
    skigolfnut's Avatar
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    tic-tic-tic-BOOM

  5. #5
    monaroman76's Avatar
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    I personally think you would be fine. I know everyone else will beg to differ though.

    I was running the minirude with 48# and stock reg and I was way rich.

    The biggest problem I could see with it though, would be if your rrfpr stopped working correctly and you were losing fuel pressure without knowing.

    This is just my opinion..

  6. #6
    !!!! wave jumper !!!! 05_RXP's Avatar
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    like mentioned you can do it but what for you spent how much else wise for other mods whats another 200 for a wideband and then you can know forsure. if you know what your doing you can do plug readings

  7. #7
    JT jpt7779's Avatar
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    I think it is the dumbest thing you could do! The weather conditions change day to day and play a huge role in the proper setting of fuel pressure using a RRFPR. I rode 3 days in a row last week and had to adjust my pressure from 62 psi on a cool morning to as low as 54 psi on a hot afternoon. Running rich puts excessive fuel in your oil and catch can and running lean will blow the motor up.

    Is it really worth the risk? It only takes one WOT run that is lean and your done. For less than $300 for a LC-1/LM-2 you can set it up properly.

  8. #8
    o uncola o's Avatar
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    I guess that the second part to my inquiry would be: how much do you need a begi?

    If I am already going to mess with trying to get my AFRs close, should I take the leap and invest in a begi in addition to the RRFPR?

  9. #9
    geowelsh's Avatar
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    I say no with a mini rude, to the begi, I had my rude 1 dialed in fine with just an rrfpr. You're not making too much boost or upping your rev limiter. But again with an lc1 you will be able to tell.

  10. #10
    Duke's Avatar
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    As Beerdart would say,

    BOOM!!!!

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