Need some recommendations on a fuel pump

So I'm at the dyno and my A/F is crapping out at about 5800 rpm making it very dangerous to put into boost. My Tuner says the duel Steeda pumps (came with my mongoose setup) aren't getting the job done. He also said I'm pushing my 30 lb injectors and really should upgrade to 42 #'s.

My question is, since my basket was modified to accept the dual pumps, would it be better for me to get a Focus or Lightning pump (and buy a new basket?) or stay with a dual setup and go with something like the dual Cobra pumps?

What other options do I have that I don't know about?

'Preciate any tips.

I'm making about 360 rwhp and only looking for +/- 400.

As for BAP's, that a good question. From what I know of BAP's, (which isn't much) they're: 1. for more aggressive applications. 2. if the pump's duty cycle is maxed out, the BAP won't help.

wmburns said:

My vote is look at the bigger injectors first.

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First, thanks for the reading. I was on the KB site, but didn't see that. I'm going to go back over there after I send this. As for the bigger injectors, We didn't max out their duty cycle yet when the pumps gave out, so we know the pumps are the weakest link. He suggested the injecters because 30# injector are not rated to make that much hp, 42's are.

wmburns said:

Could you be chasing boost at the expense of HP?

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No. But he did say that 400 rwhp was not obtainable with my 6# of boost. I would definately have to reduce the pulley. Unfortunately, as you've already outlined, that creates other problems and is not a solution in and of itself.

wmburns said:

Consider that as boost goes up, then the Delta fuel presure has to go up. Greater absolute pressure reduces the capacity of the fuel pump...Consider that in some cases, less boost and more timing could make more total HP. Isn't that really the goal?

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That makes sense and if I'm underfstanding it correctly, it does line up with what he's saying.
When I brought the car in, I had 5.58# boost , 19 deg timing and produced 360 rwhp. The A/F was already dangerously high and he backed off the timing right away. Long story short with the setup the way it is, I can't reach my 400 rwhp goal.

trinity_gt said:

...the pumps are probably not your problem. You can verify this with a fuel pressure gauge.

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Wow! that's great stuff! Thank you!
The gauge on the dyno is what confirmed that they are the problem. At 5800rpm WOT the A/F meter went straight up. That said, the fact that you're setup provides you with what I'm looking for in results indicates my understanding of BAP's is incorrect. Time to reconsider them as a viable solution.

trinity_gt said:

Do you know what the boost and/or HP rating of those kits was when sold with the 30# parts?

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I believe the base Vortech mongoose with the 3.60" pulley was supposed to deliver 6# and produced 325rwhp when first installed.

Keep in mind, I'm very much out of my league with this stuff and can't competently repeat half of what he told me but, he has a great reputation, more equipment than any shop I've ever seen and explained in detail the relationships of all the working parts.

trinity_gt said:

Just to clarify, I said fuel pressure gauge, not AFR. The AFR simply tells you you're lean but it doesn't pinpoint why.

You'd need to hook a fuel pressure gauge to the fuel rail and/or log the fuel pressure from the sensor on the rail via a scan tool to know if the pressure is dropping.

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Yes, I understood you and he was connected to the fuel rail and was monitoring both AF and AP.

fightmstr1 said:

I'm selling my 42 lb injectors and my entire GT fuel tank with SVT Focus pump that has successfully made 400 rwhp. PM me if you're interested.

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Interested? Hell yea, PM'd.