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  1. #1
    monaroman76's Avatar
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    RRFPR adjustment

    Hey guys, I know a few have run a very similar setup to mine. Im wondering what fuel pressure you were running to get AFRs close to the mark.

    What do people mean when they say "static" fuel pressure? Is this just with the key in, or the engine at idle?

    At the moment, I have key pressure set to 48psi, at idle it drops to around 40psi, and AFR is around 11.5:1 (This is on the trailer). What I dont quite understand is that it idled only slightly richer (low 11's) with the stock regulator in it. Shouldnt ~18psi of fuel pressure make much more difference than this?
    Im assuming at WOT my fuel pressure will come up to around 60-62 psi and I should be pretty well on the money.

    Thanks for any input.


  2. #2
    sniper300's Avatar
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    Static you should set at idle , it is more accurate that way. You won"t get much lower than 11.5 AFR at idle with the Riva and Bosch 48"S ,i know because i have tried it. You pretty much have to adjust your fuel pressure to get correct WOT AFR and whatever the static is , is what you are left with for idle. If you want to be able to tune your idle aswell you need a Begi setup!!! Best thing i have ever bought for my ski period.. !!!

  3. #3
    monaroman76's Avatar
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    Quote Originally Posted by sniper300 View Post
    Static you should set at idle , it is more accurate that way. You won"t get much lower than 11.5 AFR at idle with the Riva and Bosch 48"S ,i know because i have tried it. You pretty much have to adjust your fuel pressure to get correct WOT AFR and whatever the static is , is what you are left with for idle. If you want to be able to tune your idle aswell you need a Begi setup!!! Best thing i have ever bought for my ski period.. !!!
    Thanks for the reply dude. Thats what I'm after. I was just scratching my head wondering why the AFR wasnt dropping much compared to the fuel pressure. I thought maybe my LC1 wasnt calibrated correctly... Why does this happen? Does the ecu compensate for having lower pressure some how?

    Where do you think my idle pressure will have to be to get WOT AFR on the mark?

  4. #4
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by sniper300 View Post
    Static you should set at idle , it is more accurate that way. You won"t get much lower than 11.5 AFR at idle with the Riva and Bosch 48"S ,i know because i have tried it. You pretty much have to adjust your fuel pressure to get correct WOT AFR and whatever the static is , is what you are left with for idle. If you want to be able to tune your idle aswell you need a Begi setup!!! Best thing i have ever bought for my ski period.. !!!
    Just the Begi, or is it in combination with the rrfpr?

  5. #5
    rangermtb5's Avatar
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    Quote Originally Posted by 1tommygunner1927 View Post
    Just the Begi, or is it in combination with the rrfpr?
    BEGi must be run with a RRFPR

  6. #6
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by rangermtb5 View Post
    BEGi must be run with a RRFPR
    Gotchya....thank you!

  7. #7
    rangermtb5's Avatar
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    Quote Originally Posted by 1tommygunner1927 View Post
    Gotchya....thank you!
    No problem. If you guys are looking for a BEGi, PM me.

  8. #8
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by rangermtb5 View Post
    No problem. If you guys are looking for a BEGi, PM me.
    I will, but I'm waiting to see the results of the Power Commander stuff........

  9. #9
    monaroman76's Avatar
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    My ski doesnt seem to start as easily as what it did with stock fuel pressure... Is this normal?

  10. #10
    alex29573's Avatar
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    take your afr readings after the ski is warmed up and on the water

    put new plugs on it

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