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  1. #1
    TDR's Avatar
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    How do when i need to upgrade my fuel pump?

    I know when i will need a RRFPR, but when do i need to get a new fuel pump?


  2. #2
    JT jpt7779's Avatar
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    Pittsburg, Texas Lake Bob Sandlin
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    I did it when I installed the RRFPR because you have to pull the whole fuel pump contraption out of the tank to remove / block off the stock regulator for the RRFPR. Might as well do it one time.

    As far as the pump itself, when you go with a much more powerful SC than stock and running 8500-8800 rpm for extended periods, stock pump may not keep up, which will cause your AFR to run LEAN. Guys that are running 50's or larger may see this condition sooner. For what you have planned the stock 48's work great.

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    TDR

  4. #3
    TDR's Avatar
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    Great info there! thanks for the heads up. Now i know when i get a bigger SC and RRFPR to get the new Riva Fuel pump.

  5. #4
    skigolfnut's Avatar
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    When I put on my ET-137 wheel, I noticed that my AFR's were all over the board at WOT, nothing consistent, one run fine, then the next run lean etc..
    MSRXP suggest it might be my fuel pump,
    Bought a Walbro did the exchange and it was like night and day, the AFR's were spot on at WOT,
    see picture below of the pump and filters when they came out of the tank,
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #5
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    Interesting...

    Does anyone know the specs of flow rate for the stock pump?

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