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Thread: Injectors size?

  1. #1

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    Injectors size?

    I need an advise on injector size,i have a set 38,48,55 lbs,RXP '04,my mods are,stock ecu,Rude1,xs-cooler,rrfpr,kanaflex,GH waterbox,watertemp 50-65F air 65-70F.
    What will be my best choise on injectors and how high should i set my rrfpr??
    A wideband will be my next buy,but i need to get on the water..


  2. #2
    rxpredviper's Avatar
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    Quote Originally Posted by lars k View Post
    I need an advise on injector size,i have a set 38,48,55 lbs,RXP '04,my mods are,stock ecu,Rude1,xs-cooler,rrfpr,kanaflex,GH waterbox,watertemp 50-65F air 65-70F.
    What will be my best choise on injectors and how high should i set my rrfpr??
    A wideband will be my next buy,but i need to get on the water..
    48 is good! 55 is to big and 38 is goint to be lean.

  3. #3
    Avion3333's Avatar
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    what about the 42?

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    Quote Originally Posted by Avion3333 View Post
    what about the 42?
    I dont have a set of 42,i was hoping i could use one of the set i got,i am thinking the 48 but i dont know how low/high i can set rrfpr,i know it will rich at low rpm

  5. #5
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    The 48's will be the best fit.. You'll need to measure your AFR to see where you should set your fuel pressure.

  6. #6

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    You'll need to measure your AFR to see where you should set your fuel pressure.[/quote]

    I know,and i will get a wideband,just want to know a safe start point on rrfpr and injector size

  7. #7
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    a good starting point would be 60#'s on the RRFPR and 48# injectors..

    This is by no means safe, it's just a starting point!!

  8. #8
    Quote Originally Posted by Alex13 View Post
    a good starting point would be 60#'s on the RRFPR and 48# injectors..

    This is by no means safe, it's just a starting point!!


    I have a 2 Rude on a stock ECU RRFPR set at 60#s with 48's. Elevation was 570 feet and the water temp was 62 and air temp at 74 degrees. I am a little rich but safe! When the temps heat up then I should be dead on!

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