View Poll Results: 65psi fuel pressure ok?

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  1. #1

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    65psi fuel pressure ok?

    hey guys mods are in my signature.
    It seems that with this setup with all 10's in the rude fuel controller i can run mid 12s A/F at 65psi. (well it says 60psi on my rude rrfpr, which is is running the vac line disconnected, but my dynotune says 65psi). I was wondering if this is ok or if i should back it off some and add fuel with the rude.... i like the idea of tuning it WOT without the rude just incase, but whatever....
    thanks


  2. #2
    home of the dislexic fingers breon's Avatar
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    if it is really 65...it is putting a litlle extra load on the fuel pump and a little higher than i would want but ...but is probably ok...

    i am inclined to believe the rude guage...since the riva ecu and 50# are designed to work up to 12 13 psi and a rude 1 should be 13 psi at 8600 wich is still in range of the riva ecu..i ran my x charger at 13 psi with just a riva ecu and 50# and af was 12.0 wot in the cool weather..

    if your idle and mids are still ok with all 10 in the map... i really want to believe the rude guage... if you are at 65 psi your idle and mid would be rich

  3. #3
    West Texas RXP skoepp's Avatar
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    I have dynatune fuel pressure gauge and it reads higher then the gauge on my Rude RRFPR.
    I Set mine based on AFR and EGT's. Then note what the dynatune fuel pressure gauge is saying. The biggest thing that the dynatune fuel pressure gauge helps is seeing that your getting full fuel at wot. IMO

    If your running mid 12s AFR at full rpm i would try to drop it below 12s. I use to run right above 12 AFR (ski ran good too) until I added an EGT gauge.
    Depending on setup, you can easily see 1,600 + + + degrees F EGT with mid 12s AFR.
    And the longer you run wot the hotter it creeps up.
    I found 11.6 to 11.7 lower the EGT's.
    Again, every setup is different just my findings.

  4. #4
    home of the dislexic fingers breon's Avatar
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    i agree i look for 11.8 ish at wot the longer you stay in it depending on your intercooler it gets heat soaked and your af will drop...

    i dont have the egt probes yet..to know about that ..putting bungs in my new headder though..

  5. #5

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    i was way rich down low and mids even at 55psi
    i am 10.7ish idleing and 11.5ish cruizing....

  6. #6

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    tuned it at 55psi... what are you guys using for cruize afr
    currently
    WOT 11.7-11.9
    cruize 13
    idle 14

  7. #7

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    Im using these numbers that I found off the site:

    Target AF ratios are: 13.5 at idle-2500
    12.5-13 anything below 5000 and mid throttle cruise.

    Then drops to
    11.7-11.9 WOT

  8. #8
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by BoostedH23a1 View Post
    tuned it at 55psi... what are you guys using for cruize afr
    currently
    WOT 11.7-11.9
    cruize 13
    idle 14
    Those are very good numbers.

  9. #9
    rxp1972's Avatar
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    Can you please tell me why i should be to 11.7-11.9 and not to 12.2-12.4 because in my car witch had 600hp the AF ratios is 12.5 and run perfect?
    To much fuel is not always good i thing.

  10. #10
    JFizzleJR's Avatar
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    because of high EGTs and detonation. all engines are similar in some shape or form, but this is a slightly different animal.

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