Aeromotive A1000 won't keep up, any ideas?

cjmatt

cjmatt

Club Member
My car went to the dyno this week for a tune and I get a call from the guy telling me that at around 5k rpms or so, my fuel pressure is dropping off from a static 58psi down to the 20s and that I need more pump. He wasnt aware that I had a full system on the car.

My fuel setup currently consists of a -10 intank pickup that runs to my A1000, which is mounted level with the bottom of the tank, it has 100micron filter before the pump and a 10 micron filter after as recommended, it then goes to a -8 line running to a -8 one waycheck valve and then all -8 line to my fuel rail, which are aftermarket rails with 60lb mototron injectors. after that it goes to a -6 line to an aeromotive -6 FPR then -6 back to the tank.

Does anything seem out of line here? This fuel system should be good for 7-800rwhp from what Ive read. Im not looking to make over 600. its just a stock iron ls shortblock

I thought maybe it could be electrical but wouldnt I be able to keep up even at 12v?
 
dave89iroc said:
intank pickup, not a sump?
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Correct, its a glenns performance tube. Basically a big pipe that goes to bottom of tank with an AN fitting on top

IMG_0899%20%28Small%29.JPG


1BADAIR said:
is it boost referenced?
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No
 
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well u are suppose to do -12 to pump and then 5/8 to regulator -6 to rail and 1/2 back to tank is what is reccom and u need 16v to make pump work like suppose to i just did mine
 
notch92408 said:
well u are suppose to do -12 to pump and then 5/8 to regulator -6 to rail and 1/2 back to tank is what is reccom and u need 16v to make pump work like suppose to i just did mine
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I ran -10 to the pump and -10 to the regulator. Haven't had any problems. That was according to the tech guy at Aeromotive (called before I ran any lines). So far never had a fuel related problem. Should work just fine on 12v
 
I have that same pickup, but its hooked up to a weldon.

What gauge wiring is powering the pump?

I havent had any experience with aeromotive pumps, but that combo should make (like you said) 600 no problem.
 
That fuel system should easily handle 600 the way you have it currently configured, except that the regulator does need to be boost referenced. If you're putting 60psi of pressure into a 15psi intake tract, you're going to want the fuel pressure to go up to 75psi. I'm not sure what the horsepower was, but I went high 9s @ 135 with the identical fuel system. In-tank pickup, A1000, -8 feed, -6 return.

Is that pump new or used? Maybe it needs to be rebuilt?
 
Fryguy302 said:
That fuel system should easily handle 600 the way you have it currently configured, except that the regulator does need to be boost referenced. If you're putting 60psi of pressure into a 15psi intake tract, you're going to want the fuel pressure to go up to 75psi. I'm not sure what the horsepower was, but I went high 9s @ 135 with the identical fuel system. In-tank pickup, A1000, -8 feed, -6 return.

Is that pump new or used? Maybe it needs to be rebuilt?
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it was brand new. Should i drop the base pressure then boost ref it? should it be ran at that high of pressure?
 
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Matt,
How is the pump wired? That's basically the same set up they advertise for 750hp forced induction.

Are you running E85?
 
I've heard that a lot about the A1000, thats why I did not get one. They seem to have there days, also heard of magnets coming loose in the motor and other crazy crap.
If you need a pump, let me know, I've got a monster that I am not using.
Look up a Mallory 5160FI if you need. I'd also reference it to your FP regulator if it isn't, I read but it wasnt clear on the original post.
As mentioned too, check the wiring, if you are running a relay and power from the front of the car to the back, you're probably losing a lot of power. Set up another relay as close to the pump as you can, make sure you've got a phat ground wire on it as well with a good connection.
 
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Duke wired it to a nice Bosch relay in the trunk, it's wired right off of the battery right next to it back there. I'm assuming it's wiring is just fine. I just wonder how much power the battery is getting from the alternator, which routes through the fuseblock on the painless harness.

Could I run the fuel pump power from the alternator output.
 
Under a 1/3 of a tank that pickup can get out of fuel at high loads and cuase Pressure issues. How much fuel is in the tank ?




cjmatt said:
Correct, its a glenns performance tube. Basically a big pipe that goes to bottom of tank with an AN fitting on top

IMG_0899%20%28Small%29.JPG


No
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Sean said:
Under a 1/3 of a tank that pickup can get out of fuel at high loads and cuase Pressure issues. How much fuel is in the tank ?
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it should have probably a half tank. Maybe more. Fuel slosh shouldn't be an issue on the dyno though with no g forces
 
Shit im near 600 with stock sender, stock lines, stock rails, 255 walbro, 60lb'ers, and a KB BAP and no signs of losing pressure. I'd call aeromotive and tell them to shove that pump up there ass :lol:
 
cjmatt said:
it should have probably a half tank. Maybe more. Fuel slosh shouldn't be an issue on the dyno though with no g forces
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Its the fuel circulation that can cuase the issue. The return can push fuel away from the picup tube and cuase cavitation. Seen it a few times. Try putting more fuel in the tank.
 
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