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Thread: Boost a pump setting?

  1. #1
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    Question Boost a pump setting?

    What setting do you have your Boost a Pump at?
    I did a few dyno runs this week and the air fuel was a bit lean.
    The manual instructed to set the pump at 10.
    After turning it up a bit the Air fuel got Richer.
    I ended up leaving it set at 20, that is where my motor seemed happiest.
    I sampled the A/F from the existing 02 bung(2nd one)
    58* made 370 RWHP and 360 RWT low eleven A/F
    2004 Trilogy #93P 12.2@113 Built and stalled

  2. #2
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    Set it halfway and forget about it.

  3. #3
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    That is pretty close to where it is set now.

    10-50 half would be 25.
    I set it to 20, I did a pull at 25 and it was reading slightly rich.(High tens)
    Quote Originally Posted by Zack
    Set it halfway and forget about it.
    2004 Trilogy #93P 12.2@113 Built and stalled

  4. #4
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    The BAP can change the voltage output to your fuel pump from +1 vdc to +5 vdc --- 10%=+1 vdc ---- 50%=+5 vdc In the literature that came with the BAP it does not mention a setting lower than 20% for use on a '03 Cobra with a 4" pulley and 9 psi.

    Lidio/Trilogy recommend the setting at 10%=+1vdc, I believe the person most qualified to ask about this setting is Lidio, he is the one that created the special tune that the base Trilogy ships with.

    The BAP is boost activated, if you simply increase pump voltage the excess fuel goes back to the tank, ask Lidio if he overrides the EEC looking for 30 psi of fuel, that was my fuel pressure at the rail at idle when I was n/a, have not checked it since the s/c.
    Smokie
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  5. #5
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    I hope Lidio will respond here, as I distinctly remember him tell me it should be set (at least in my case) to 30...he put it there and I've left it alone...
    The Blackbird
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  6. #6
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    Quote Originally Posted by RF Overlord
    I hope Lidio will respond here, as I distinctly remember him tell me it should be set (at least in my case) to 30...he put it there and I've left it alone...
    Yeah, now you got me scratching my head, the Trilogy manual page #51 states the "initial set for the controller should be put to 10".

    That is were mine is 10, why use the word initial, it implies to be changed later.....to what......
    Smokie
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    60' 1.851 Street tires & Stock wheels.
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  7. #7
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    What pulley are you guys running?

    I have the 3.2 w/ the BAP set at alittle over 35.

    11.98 @ 115 mph
    "Comfort, Class and Hair on Fire Performance."

  8. #8
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    Quote Originally Posted by Defyant
    What pulley are you guys running?

    I have the 3.2 w/ the BAP set at alittle over 35.
    I don't remember the size, the black one that comes with the base T-Kit, makes 9.5 psi.
    Smokie
    12.79 @ 107 mph.
    60' 1.851 Street tires & Stock wheels.
    TIMESLIPS
    Performance Mods: Base Trilogy Kit, Exhaust, PHP Airbox.
    Visit my Garage
    Florida "The Supercharged State"


  9. #9
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    The stock pulley is 3.4"

    Moving to a single size smaller pulley(3.2), Does not require a retune unless you have done other mods as well.This is what I remember Lidio telling me, several weeks back.

    Quote Originally Posted by Smokie
    I don't remember the size, the black one that comes with the base T-Kit, makes 9.5 psi.
    2004 Trilogy #93P 12.2@113 Built and stalled

  10. #10
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    Quote Originally Posted by Defyant
    What pulley are you guys running?

    I have the 3.2 w/ the BAP set at alittle over 35.
    Whoops!

    I have the 3.0 pulley.


    11.98 @ 115 mph
    "Comfort, Class and Hair on Fire Performance."

  11. #11
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    I've alwys left the BAP setting on 10, and my A/F ratio fluctuates throughout the RPM range from 11.8 to 1, to 13.1 to 1, and Lidio said that is just fine. I now have 24,000 supercharged miles on my Marauder with the setting on 10.

  12. #12
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    Quote Originally Posted by Smokie

    The BAP is boost activated, if you simply increase pump voltage the excess fuel goes back to the tank,
    Not on a Marauder...returnless fuel system.
    2003 Marauder 300A
    Trilogy Supercharger Serial #0054
    Installed by Carfixer 10/16/2004

    Tallboy's Garage

  13. #13
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    Quote Originally Posted by Bradley@DynoPros
    I sampled the A/F from the existing 02 bung(2nd one)
    Are you saying that you've been taking the A/F ratio reading from the secondary 02 sensor bungs (after the cats???)???? If that's what you've been doing, then you can forget about those A/F ratio readings since they're not going to be accurate(must be taken BEFORE the cats, NOT after).

  14. #14
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    Quote Originally Posted by Tallboy
    Not on a Marauder...returnless fuel system.
    How is fuel pressure regulated then, by slowing down the pump?
    Smokie
    12.79 @ 107 mph.
    60' 1.851 Street tires & Stock wheels.
    TIMESLIPS
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  15. #15
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    That has not been my experience.
    Quote Originally Posted by BillyGman
    Are you saying that you've been taking the A/F ratio reading from the secondary 02 sensor bungs (after the cats???)???? If that's what you've been doing, then you can forget about those A/F ratio readings since they're not going to be accurate(must be taken BEFORE the cats, NOT after).
    2004 Trilogy #93P 12.2@113 Built and stalled

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