Quote:
Originally Posted by parish8
I have a max effort fuel system that I think checks all the boxes but it is fairly complex. it is good for at least 2000hp on e85.
the issues I see with the multi pump drop in set up is don't you loose the basket and risk sucking air when the fuel sloshes? don't you have the same issue with a typical aux pump that taps the rear of the tank? either set up I wouldn't be worried racing if I was under 1/2 a tank.
even though people have done it for years I wouldn't want a return only set up, at least not one that pumps fuel constantly through the rails.
I have a stock in tank pump. right as it leaves the tank I hit a t fitting with a .065 jet built into it. this is about a 100hp fuel jet. the t feeds a pair of surge tanks with 4 pumps built into them that I can stage as needed.
99% of the time the stock pump runs and is controlled by the factory controller and only pumps as much fuel as needed to maintain the programmed fuel pressure. there is that ~100hp worth of fuel that cycles to the surge tanks and once full back to the factory tank. there is a return style regulator up in the front of the car but I have it set higher than the programed fuel pressure so it doesn't return anything until the aux pumps kick on.
when I floor it the surge tank pumps kick in. the regulator up front is set to something pretty high like 80psi so once these pumps kick on it turns into a return set up with fresh fuel flowing through the rails. this set up maintains the factory basket and allows you to run low fuel levels. it also does not heat the fuel. I would have to look back at my math but this set up should be good for something like 1400hp on e85 for 20 seconds and 2400hp on e85 for something like 10 seconds.
it was pretty expensive but not crazy money. the surge tanks were under $100 each, the pumps were something like $165 each. it is the fittings and y's and stuff like that that adds up.
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Who built it and how much total do you have in it? I'm looking for something that I can eventually be 1000+ at the wheels with. The day will never see more than 1200 at the wheels it I ever decide to go that far. Right now it looks like the best thing for me, looking for 700-750 at the wheels, is the LT4 high side with an auxiliary pump on the low side. After that I was going to look into port injection or the high DI injectors.
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