whos running procharger and A1000 pump

[68zz502fi]

Im currently in the design phase on my fuel system for my ZZ502 in my 68 camaro. I want to know what line sizes those of you that are running fuel injection the Aeromotive A1000 pump and a Procharger are using for supply and return lines.

I am planning on running an Aeromotive A1000 and 1/2" stainless from the tank to the Aeromotive regulator. -8 or -10 from the regulator to the fuel rail ,(Holley Projection2) it only has one inlet on the passenger side fuel rail for a fuel feed. I will be using a custom fabricated -8 fitting to adapt into the fuel rail and discarding the -6 inlet regulator assembly that came in the Holley MPFI kit. I was considering using 3/8 stainless for the return line. I have read and heard conflicting information on this, some say Its plenty big enough and works fine, some say no. I've heard of it causing fuel pressure problems (spikes) for some systems, others say NO it dosent, what are your experiences?

Maurice

[Blown353]

-10 from the tank to a 100 micron pre filter, -10 from the pre-filter to the pump, -8 out of the pump to a 10 micron post-pump filter, then -8 from the filter to the regulator. Return from the regulator can safely be -6, but -8 will work too. -6 is more than enough to handle the return needs of an A1000... at EFI pressures. If running a carburetor keep the return line the same size as your feed line or else you probably won't be able to adjust your fuel pressure low enough.

Avoid any machined angled pipe fittings especially on the suction side of the pump, and if running carbureted the return line needs to avoid them too.

[68zz502fi]

thz for the reply, I appreciate the information.

Maurice

[blown69nova]

My A1000 could not keep up at high pressure, so make sure it will keep up with your setup.
I use -10 feed, -8 return and it works flawlessly. I'm using the Magnafuel Pro Tuner 500 pump now and it does not fall off at pressure like the A1000 (I run 18+ psi boost).
Steve

[68zz502fi]

thz for the reply steve, what is your fuel pressure set at and what cubic engine size are you running..at what maximum RPM? also, what size injectors are you running and what model procharger?

Maurice

[Blown353]

As far as the pump keeping up, all it needs to do is provide enough PPH of fuel for your engine at a specific pressure plus a little bit of headroom.

It's also a good idea to perform a flow test on your pump & fuel system when new and then do them periodically thereafter to monitor your pump performance, you'll be able to spot it going away before it leaves you stranded or worse yet, before the high pressure flow drops off enough for your engine to run lean and you break something.

Rule of thumb for boosted engines is guess what your power is going to be and then use a conservative .65 BSFC to get a pph of fuel requirement. Then figure what fuel pressure that fuel volume needs to be at (figure 42 psi + whatever your boost is) and make sure your pump can flow that many PPH plus about 15% headroom at that pressure. Aeromotive has charts of flow vs. pressure.

There are several options... one pump with a speed controller, one pump with a volt booster, multiple pumps triggered by IDC, TPS, or pressure switches. All approaches have their own merits and disadvantages.

For example, assuming 15 psi of boost (42 base psi + 15 boost referenced psi = 57 psi fuel pressure) an A1000 at 13.5 volts will flow about 520 lb/hr roughly according to their chart. (My real world experience with A1000's say they're only good for little less than that.) Taking that 520pph of flow @ 57 psi, take away 10% for some headroom which leaves 470 pph of "safe" fuel available, that 470pph at a .65 BSFC will support right around 725 hp at that fuel pressure.

http://www.aeromotiveinc.com/prod_im...64-2-large.jpg

As with any of these calculations always err a bit to the conservative side (high BSFC, round up the pressure a couple PSI, use a lower pump voltage, etc.) That way you'll be sure you will not run short on fuel... because that gets expensive in a hurry when boost is involved.

And always flow test your fuel system in the car prior to putting the right foot to the floor. I've had weak pumps right out of the box that flowed up to spec at 42-44psi but dropped down to 150-200pph at 60 psi. That wouldn't have been pretty under WOT.

Doing a flowtest is easy, set your regulator to your max PSI and run the return line into a fuel jug. Run the fuel pump for a known amount of time and then weigh the fuel in the jug. Do the math to convert into to pounds per hour and verify everything is up to requirements.

[blown69nova]

My base pressure is set at 43. Under full boost (at the track) datalogging my pressure, I could see it dropping off, and fortunatey just losing power.
My engine is an 8 to 1, 383 sbc with TFS heads and a moderate sized cam. As far as power, I don't have dyno numbers, but I did go 10.61/130 mph @ 3,725 lbs.
If you look at Aeromotives published flow vs. pressure ratings you will see they don't do well at higher pressures. Do yourself a favor, and get a Weldon, Magnafuel or duel Bosch pumps and be done with it, you won't be disappointed.
Steve

[Blown353]

I am having excellent luck with my SX pump but if I had to do it again I would do twin Bosch 044's with the second pump running off redundant hobbs switches.

[blown69nova]

Ditto on the twin Bosch's.

[mark69rs/ss]

I'm getting ready to do my new fuel systen on my vert , I'm building a ATI procharged 427 small block , i have a rock valley stainless tank with 1 aeromotive A 1000 pump inside , the other will be mounted outside the tank and only run when the motor is under boost , i'm using the aeromotive pump controller . We did a friends car with this pump inside and you can hardly hear it , then you won't here the one outside the tank with the rear tires burning . I'm running -10 to the fuel injection with a -8 return .
Mark.

[SDMAN]

For the last 4 years I havent used, or recommended ANYTHING other than Magnaflow fuel pumps. I use an EFI-600, and its far and away the highest quality fuel pump going. Clockable pump end, mounts in any orientation, pressure range from 20#-100# and completely rebuildable. Its not an in tank mount (I dont really like that setup).

And they flow enough volume to water your lawn. Not inexpensive, but worth every penny in my book.

[mark69rs/ss]

They are to noisy outside the tank , We tried one of those in our drag car , it worked great , we also use the Aeromotive no problem also .
Mark.

[SDMAN]

They are to noisy outside the tank , We tried one of those in our drag car , it worked great , we also use the Aeromotive no problem also .
Mark.

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Incorrectly mounted, yes, they can make a little noise. Properly insulated, you will never hear it over your exhaust.