Anyone know right off hand what the flow rate difference is between the two?

I'm running well under 90% duty cycle on my Roushcharged F150 (about 9 to 9.5 lbs of boost), and I have pulley on the shelf to up it to about 11 lbs. I'm not planning to run E85, that would be another project for track use only since E85 isn't cost-effective at this point and I can't see spending the money on injectors and a BAP simply for the occasional track use. Future plans are to eventually go all out with a dual pump setup, engine work, etc. and then crank the boost way up. But that's probably another year or so away, I have too many other vehicle projects gunning for my attention!

Basically, if the FFV pump gives enough extra flow for the added boost I'll swap it for the non FFV pump in there now. FYI the pump is coming off a FFV 2006 F150 with under 10,000 miles that was driven by an old man before it was totaled, so I'm getting it dirt cheap/

I plan to data log, and use tuning software redo the fuel pump voltage tables, and anything else I find which it needs to keep the A/F where it needs to be. If this sort of swap will do the job, it'll put off adding the BAP for a while -- besides it sounds like a fun project.

I've searched in my Ford manuals and can't find the flow rates, and searched online but get so much crap that isn't about this specific question that I finally threw in the towel posted the question here.

 

Anyone?

 

You shouldn't have to modify the tune at all when adding a different pump.

They might be the same pump, but with different seals.

One way I would imagine that would help get a little more flow out of the stock pump is to remove the inline check valve.

 

True, just like with a BAP, the PCM will use PWM to regulate the pressure. However, its always a good idea (for me anyway) to data log it after making changes to the fueling system, see what its doing and tweak as needed. Tweaking the tables on the stock pump alone with a Roushcharger can get 5-10% more cushion with the duty cycle and minimize the temp lean going to WOT (Roush's tune will spike at darn near 100%). Removing the check valve raises another set of issues I don't want.

If I find the pump is the same, I'll post that info here. If I do find they have different flow rates, I'll also post that here. If they are the same.... BAP will be the next step.