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  1. #1
    snowrunner's Avatar
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    X sc and walbro on 215? Nees help with fuel pressure!

    Can someone gice me a starting point? I have a lot of fuel in my catch csn after 2 hrs of use filled the can and overflowed. Was running at 60 psi baseline ay sea level.
    Last edited by snowrunner; 07-30-2009 at 08:18 AM.


  2. #2
    rxpstage2+ rw40426's Avatar
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    i have X charger on my 215. And an lc1 with baseline set to 60 it was way rich are you sure you have the numbers correct? low numbers are rich high numbers are lean?

  3. #3
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    RW what injectors are u running and what IC and where do u have ur base pressure at to not be rich i am running same setup with stuff in my sig.

  4. #4
    rxpstage2+ rw40426's Avatar
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    42's and XS ic also 4'' kanaflex. i have my base psi at 41

    idle afr 11.0

    1/2 throttle is 12-14

    wot 11.9

    it was running so rich i could not get afr right until i lowered fuel pressure. it may not sound right from what others are doing but this worked for mine. i went from 73mph to 75.5 just by adjusting rrfpr. may be able to get a little more mph if i ever get a good glassy water day

  5. #5
    speedskixp's Avatar
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    Quote Originally Posted by rw40426 View Post
    42's and XS ic also 4'' kanaflex. i have my base psi at 41

    idle afr 11.0

    1/2 throttle is 12-14

    wot 11.9

    it was running so rich i could not get afr right until i lowered fuel pressure. it may not sound right from what others are doing but this worked for mine. i went from 73mph to 75.5 just by adjusting rrfpr. may be able to get a little more mph if i ever get a good glassy water day
    Wow! Are you sure you have 42s and not 50s? There is no way 42s should be that rich at idle with less than 40 psi idle pressure. I would expect an idle A/F in the 14s with 42s and that low pressure.

  6. #6
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    yeah i ask cause right now i am at 60 base and am so rich u can smell it and on the hose u can see the blackish smoke from the unburned gas.

  7. #7
    rxpstage2+ rw40426's Avatar
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    yes im sure they are 42's

  8. #8
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by rw40426 View Post
    yes im sure they are 42's
    WHats your altitude???

  9. #9
    rxpstage2+ rw40426's Avatar
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    300ft above sea level

  10. #10
    speedskixp's Avatar
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    Quote Originally Posted by JonnyRXT View Post
    yeah i ask cause right now i am at 60 base and am so rich u can smell it and on the hose u can see the blackish smoke from the unburned gas.
    I would expect a slighly rich idle with the 42s at 60lb base and you should keep in mind that there are alot of veriables that can make one persons results very different from another. Rate of rise variations is a big one considering that some people are seeing a true 1:1 rise and others may see almost or no rise at all. That can be a 10 or so pound difference at wot. Altitude and weather make a huge difference, engine condition/tuning makes a difference, injector brand/type and so on. This is why its important to check your a/f.
    Quote Originally Posted by rw40426 View Post
    yes im sure they are 42's
    Those are some extremely rich idle #s for 42a and that low of pressure in my experience but who knows? Maybe other will chime in with there experiences and idle a/f with 42s on stock ecu.
    Quote Originally Posted by skoepp View Post
    WHats your altitude???
    .

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