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  1. #1
    ZeXteR's Avatar
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    XXX Charger on 255hp - 50lbs or 60lbs injectors??

    Hi People!

    RXT-X 255hp, 2008, 15/22r, 83mm ring, Stock Intercooler, Riva ECU, Riva Valve Train Upgrade Kit, Free Flow:

    XXX Charger + Riva 50lbs or Siemens 60lbs? With 50lbs Riva reccomend use a RRFPR configured as 60psi.

    The question: 50lbs or 60lbs injectors. With 60lbs, can use a RRFPF with 60psi??

    Thank you!!


  2. #2
    MSRXP's Avatar
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    50's.

  3. #3
    pansil's Avatar
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    I think you should use 50's injectors.
    How is 15/22r? I have a little more aggresive setup from you (igni power camshaft etc) and i use 15/20r

  4. #4
    Eastside Powersports Slow 91's Avatar
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    Use bosch 50's. we have a ski here thats running a xxx and running bosch 50's and its runs excellent.

  5. #5
    MacDaddy_rxpx's Avatar
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    Quote Originally Posted by Slow 91 View Post
    Use bosch 50's. we have a ski here thats running a xxx and running bosch 50's and its runs excellent.
    +1 bosch>riva 50s. I've heard many bad things about the Rivas.

  6. #6
    ZeXteR's Avatar
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    Quote Originally Posted by pansil View Post
    I think you should use 50's injectors.
    How is 15/22r? I have a little more aggresive setup from you (igni power camshaft etc) and i use 15/20r

    Camshaft works good? You use Rotax Racing Camshaft? More acceleration/top speed?

  7. #7
    dnielsen's Avatar
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    Quote Originally Posted by Slow 91 View Post
    Use bosch 50's. we have a ski here thats running a xxx and running bosch 50's and its runs excellent.
    +1, use Bosch 50s, RRFPR with the boost line attached, base pressure set 60 psi. RRFPR should be designed to produce a 1:1 rising rate. Get a good AFR monitoring setup and tune from there.

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