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Thread: help urgent

  1. #1
    deansta's Avatar
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    help urgent

    hi just need to know what presssure should i be running i my fuel regulator on my gprxp??
    the engine is fresh and i have to run it in


    04/05 engine
    rude1 charger
    42 inject
    8500 ecu
    rr intercooler


  2. #2
    mrbtd's Avatar
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    Start at 60 and tune it. No way we can tell you the exact base pressure because gauges differ and there a bunch of other things that will effect your AFR.

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  4. #4
    Autosport's Avatar
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    Dean, you will need to put a n air fuel ratio meter on the ski and adjust the pressure so the air fuel ratio is correct.

    For you're info, I'm pulling my fuel pressure reg off and running the factory regulator as suggested by Danny.... have you thought of doing the same? (added advantage is you'll get some extra $$ for your reg as well).

  5. #5
    mrbtd's Avatar
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    If you are running an aftermarket ECU your injectors probably arent big enough.

  6. #6
    Autosport's Avatar
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    Quote Originally Posted by deansta View Post
    04/05 engine
    rude1 charger
    42 inject
    8500 ecu
    rr intercooler
    PS: Dean, I think yours is an 8300 ECU isn't it? Unless you've changed it since purchasing it?

  7. #7
    deansta's Avatar
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    Quote Originally Posted by Autosport View Post
    Dean, you will need to put a n air fuel ratio meter on the ski and adjust the pressure so the air fuel ratio is correct.


    For you're info, I'm pulling my fuel pressure reg off and running the factory regulator as suggested by Danny.... have you thought of doing the same? (added advantage is you'll get some extra $$ for your reg as well).
    i got a cam thats going in after i run it in...thats why im not pulling it out..

  8. #8
    deansta's Avatar
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    Quote Originally Posted by Autosport View Post
    PS: Dean, I think yours is an 8300 ECU isn't it? Unless you've changed it since purchasing it?


    i pulled it off and it says 8500.....jason said it was that as well..

  9. #9
    deansta's Avatar
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    Quote Originally Posted by mrbtd View Post
    Start at 60 and tune it. No way we can tell you the exact base pressure because gauges differ and there a bunch of other things that will effect your AFR.


    all i want is a safe starting presssure just to run it in.....after i run it in i will then put the meter on it to tune it .

  10. #10
    Duke's Avatar
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    Every ECU is different!! Only way to be sure is by using a wideband.

    Just guessing is going to bite you in the ass!!

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