krazywli19

I find it hard to believe the aeromotive a1000 pump isnt supplying enough fuel pressure. Look at your line size rather than the pump itself. To get the most out of it you need to run a -10 AN feed, and either a 8 or 6 return. My friend just dynoed 613rwhp on his MR2 with the a1000 pump, 45psi base + 28lbs of boost. has every gauge imaginable and its not losing fuel pressure and still has fuel left to go.


Also, walbro pumps are loud so if you want a quiet dual setup use two supra pumpsThey outflow the walbro's and are quieter as well.

Red-Rx7

I have an -10AN feed, and a -8 AN return.

Heath

iTrader: (11)

Are you serious about the 900hp or did I misunderstand? If so I gotta call you out for the list of mods!

Red-Rx7

I am serious. Why else would I say it? I will list the modifications in a bit. I am going to go eat dinner.

Heath

iTrader: (11)

I'm guessing 20b is on the list

bee

I could be wrong but isnt your car being buildt by acosta? If so.. I want some pic's of that 20b under that hood. Dont cheap out on us..

sub-zero

Running One Aeromotive @50 PSI base and very rich @10.2 - 10.5 I had enough fuel to reach 24 PSI on large street port and a T-72 .96 hot side. I use 10 AN feed to the pump, 8 AN to the rails and 6AN return. If You can hear the pump over the car then something is wrong, it is loud but not that loud, if it is mounted properly. Two A1000 pumps should supply enough for a ton of power on that 20b.

Marcel Burkett

I run - 10 supply , -6 return , sumped fuel tank , three rails with 4 x 850's and 2 x 1300's and a Paxton FPR. This is on a half bridge with a TA 51 turbo (76mm comp . wheel ) and one A 1000 just can't cut it !!!.
Will let you know how twin '044 work.

SPOautos

Two 044's should flow about 40-50% more at 75+psi than the A1000

Also, krazywli19 you cant really compare performance of a piston engine to a rotary engine. With that same amount of fuel that your buddy made 613 with a rotary would only make about 500rw and yes if you keep your pressure failry low like around 75psi then the A100 is good for around 500-550 on a rotary. I'd rather have 2 intank Walbros that you cant hear, cost WAY elss, and flow enough to make 600rw. Also, are you sure your buddy has the A1000? Aeromotive has a lot of different pumps and some of them look real similar to the A1000 but flow a lot more. In addition the Supra pump really only flows more than a Walbro if you run it right off the battery or boost the volts to make it flow more and now that people have been doing that for a while I've been hearing stories that the pumps are dieing after 5K-15K miles with high voltage. In addition 2 Supra pumps cost about 3x more than 2 Walbros for basically the same performance at stock voltage.

STEPHEN

Marcel Burkett

Very true about the piston to rotary comparison , but the other part about low (75psi ) pressure....., I was hitting just 53psi and falling back to 45 !!.
Remember those are positive displacement pumps , and can only build pressure by pumping against a head which happens to be the FPR in the system. But if the injectors are "bleeding" the fuel to the motor faster than the pump can "pack " it in then the fuel pressure WILL fall. This is why it is important to get the flow figures at a relatively high pressure (like the 75-80 psi recomended max for FI systems) like those given by BOSCH.A flow of 200lp/h @ 5 bars will definately get the job done!!.

SPOautos

When I said 75psi I was meanging pressure at the pump, not the rail. So if your running 45base, plus 20boost plus 10 line losses then that would be 75psi at the pump to make 45 base rail pressure. If you were trying to run 53psi rail pressure then at say 20psi of boost your pump pressure would be around 83-90 depending on line loss. And yea your right, I can see how you were having probs cause that A1000 doesnt flow much at those high pressures. You'd be way better off with 2 Bosch 044's with that much pressure. They hold rock solid to (I think) abount 120pump pressure. From memory I think 2 044's would make around 500LPH up to 120psi of pump pressure.

STEPHEN

krazywli19

He was mid 11's a/f ratio. The a1000 pump is meant to supply enough fuel for 1000hp NA application and 700 in forced induction application. Also add on that the pump flows less at the the higher pressure he was running oppossed to what amount of fuel pressure and boost the rotary guys run (73psi). Only difference I see between a rotary and piston is rotary's generally run much richer which is why the fuel requirements are way above that of a piston motor.

But you are right, for the most horsepower and ease, throw two walbros or supra pumps in. Even at 12v the supra pump still is on par with the walbro. WHen you up the voltage to 13+ it really starts to shine.