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  1. #1
    richrxp's Avatar
    Join Date
    Jun 2006

    Exclamation Good help finding what size injectors to use for each setup.

    I found something,to determine the right size fuel injectors for each setup.

    Very important you know your boost pressure,fill in the chart and the proper size injector is given.

    I did some testing riva x-upgrade 12 psi
    1 psi added = 10 hp
    stock hp x model 255 hp
    stock x-charger = 10 psi

    255 hp + 20 hp (2 psi upgrade from charger) = 275 hp

    stock fuelpressure 58 psi

    3 injectors used

    brake specific fuel consumption 0.50 ( charts says 0.55-0.60 this doesn't work just keep the 0.50)

    Now fill in the fuel injector worksheet.

    Outcome required injectors is 49.62 riva claims 50 lbs .

    I also did the test for the 215 hp engine,outcome the same as oem size .

    This really works ,as long as you now the extra boost your getting from your new supercharger upgrade,you can find the right size injectors.

    I use it only as a reference,and a rrfpr can be added to get the right afr,but still its a big help!

  2. #2
    Jarrett's Avatar
    Join Date
    Apr 2005
    Waxahachie, TX
    That's cool, thanks.

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