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  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 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
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    Tallboy's Garage

  9. #9
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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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  10. #10
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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).

  11. #11
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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

  12. #12
    Quote Originally Posted by Bradley@DynoPros
    That has not been my experience.
    When ever we would plumb for a/f readings for ford in their test vehicles we would sample from b4 the cat, between the first and second cat brick and after the cats. I guess you would have different formulas to figure each reading out.
    2003 300A Trilogy #80 SOLD, SOLD, SOLD.

  13. #13
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    Quote Originally Posted by Bradley@DynoPros
    That has not been my experience.
    Well, according to Lidio, it has been his. He was the one who told me during a phone conversation that taking A/F readings from a tailpipes sensor is NOT a good method, and that they should be taken before the cats. And I've heard that from others too. So it was my understanding that if it's taken from the seconday 02 sensor bunngs, then it wouldn't be good either, since that's after the cats. Why not just take your readings from the primary O2 sensor bungs, since they're before the cats?

    BTW, you stated that while you had the BAP set at 10, your A/F ratios were too lean, however, you didn't mention what they were. Were they over 13:1??? If not, then that's okay according to Lidio, since the Trilogy S/Cer kit is intercooled. The guy who performed my Dyno TEST (NOT dyno TUNE) told me that my A/F ratio being 13.1:1 was waaay too lean, and he wanted to tune the car for me, to get it at 10.5:1 to 11.0:1. So I walked out of that place, and called Lidio, and Lidio said that he was wrong, and that would only be neccessary for it to be running pig rich like that if the Trilogy kit didn't come with an intercooler.

    Hmmmm, something tells me that we've had this discussion before in another thread. Perhaps you didn't believe me the last time I wrote that, so maybe you still don't. If not, then good luck. As for me, I trust Lidio since he was the one who developed the tune for the Trilogy S/Cer kit in the first place, and he has been burning the tunes in the chips that come with the Trilogy kits ever since.
    Last edited by BillyGman; 10-08-2005 at 11:29 AM.

  14. #14
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    My A/F was over 14 at 6000 RPM according to the sniffer method(tailpipe sample)

    That is why I increased the Boost-a-pump setting to 20.
    It may read slightly leaner via the tailpipe method of sampleing the A/F compared to before the cats.
    It has been my experience that the difference between tail pipe and pre Cat converters is insignificant.
    I also discussed this topic at length with Lidio, I feel this method is fairly accurate and he seemed to agree.
    I also believe, If advancing the timing,(as in a dynotune) this should be done before the cats.
    Your results may vary.
    2004 Trilogy #93P 12.2@113 Built and stalled

  15. #15
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    Quote Originally Posted by Bradley@DynoPros
    .
    I also discussed this topic at length with Lidio, I feel this method is fairly accurate and he seemed to agree.
    Hmmm, that isn't what he told me. Oh, well........good luck....

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