Boost a pump setting?

[Bradley G]

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

[Zack]

Set it halfway and forget about it.

[Bradley G]

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)

Set it halfway and forget about it.

[Smokie]

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.

[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...

[Smokie]

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......

[DEFYANT]

What pulley are you guys running?

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

[Smokie]

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.

[Bradley G]

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.

I don't remember the size, the black one that comes with the base T-Kit, makes 9.5 psi.

[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.

[BillyGman]

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.

[Tallboy]

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.

[BillyGman]

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).

[Smokie]

Not on a Marauder...returnless fuel system.

How is fuel pressure regulated then, by slowing down the pump?

[Bradley G]

That has not been my experience.

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).