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Thread: 50 injectors

  1. #1

    50 injectors

    just wondering if i put an x charger 4 inch intake and rrfpr on a stock rxp i know i need to upgrade the injectors.
    i know everyone recommends 42s but can i run 50s so i have the option of running the riva ecu later? or would i be putting in to much fuel?


  2. #2
    rick xp's Avatar
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    If you were going to use the 50lb injectors you will need to get a RRFPR and drop the base pressure down to 45 PSI or something like that.

    This is not recommended as it will be running still quite rich down low and will be mixing fuel into the oil and will require more frequent changes.


    How about forget the charger for the moment and buy the 50lb injectors and a Riva ECU w/ Valvetrain and run that for now. You will see 200-250 RPM gain by doing this but you can pretty much wait for a sweet deal to come along on a charger and put it no worries without having to worry about fuel requirements.

    Just saves buying 42's now and then buying more injectors later on.

    I hate buying stuff twice.

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    Moderator Snoman's Avatar
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    Quote Originally Posted by rxpdan View Post
    just wondering if i put an x charger 4 inch intake and rrfpr on a stock rxp i know i need to upgrade the injectors.
    i know everyone recommends 42s but can i run 50s so i have the option of running the riva ecu later? or would i be putting in to much fuel?

    Your gonna be pig rich with 50s..Are you running an external IC???42s are recommended when running a external IC..

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