Fuel Pump

[Mr_Clean]

Does anyone know of aftermarket fuel pump internal or external for the 1999 and up Grand Am Gt's??????:confused:

[aleroboy]

dunno
I'm thinking aobut a Grand Prix unit if its bigger or will fit
the trailblazer seems to be a good sorce for fuel system upgrades too so I might get lucky.
However with my larger injectors and high psi, the stock pump is still supporting it. So not sure when exactly a larger pump would be needed.

[Monello]

Please find this out, i cant find a pump anywhere, it seems like a dealer only part. Find out if we can use the Walbro 255, the GTP guys are using it.

[aleroboy]

ok I'll have to have my dealer friend order up a few pumps to compare.

or a trip to autozone to **** them off ;)

[Monello]

lol, nice! I know that Autozone doesnt stock our fuel pump either, and i called a ton of places. Only people who had it were, CarQuest, Pepboys, And Napa i think. And all were listed at 280+

Let me know what you find out.

[Craig99SE2]

Why bother messing in the tank? Just get a Vortech or ANY in-line and place in the fuel supply line. Basically, the inline will do all the work and the in-tank will just sit there idle.

[Greed4Speed]

Wouldn't an idle stock pump on the end be a major restriction if not block off the line? Just replace it with a tube and screen if you are going to run an in-line unit.

[Craig99SE2]

Not really, if you want keep it plugged in! Tehn it will act as a "pre-pump" for the larger one to work less! Either way, it works just fine.

The point was that you have no need to drop the tank to upgrade a fuel pump.

[Greed4Speed]

ok, I get what you are saying. I was thinking about a crapped out pump, since I'm on my third. So if it goes again I'll be looking for something else.

If you ran it this way, wouldn't an inline pump pump more than the stocker? If this is the case wouldn't it create probs for the inline?

[AaronGTR]

There are several in-line universal pumps you could use. The one one RKsport has for all their GM cars should work. You would need to leave the stock intank unit plugged in and working because it is more than just a pump. It also is your gas gauge and has a pressure sensor that makes sure your gas cap is sealed (as part of the emmission controls). That shouldn't matter though. The in-line unit would still increase the fuel flow.

The real question is, why do you want one? None of us are near the limits of the stock pump yet. If your engine was making the kind of power you needed another fuel pump for, you'd be breaking transmissions right now. Until then it's just a waste of time and money.:rolleyes:

[Greed4Speed]

Personally, I'd only want one to replace the stocker if it keeps eating them.

[Craig99SE2]

Originally posted by AaronGTR
The real question is, why do you want one? None of us are near the limits of the stock pump yet. If your engine was making the kind of power you needed another fuel pump for, you'd be breaking transmissions right now. Until then it's just a waste of time and money.:rolleyes:

Yes! I agree! With my project, I plan on producing 300HP. I plugged those numbers into the EFI section of the Turbo Fast calculator and I only need 19 lb/hr injectors at 45psi with an 80% Duty Cycle. Since the stockers are tuned to 22.5 lb/hr, I don't see the need to upgrade. If you are running lean, increase duty cycle in the PCM! The stock fuel system is more than capable!

If anyone wants to see the calculator results, go to my webpage under 'Custom Turbo' in the 'Engine' section.

[AaronGAGT]

Originally posted by Monello
lol, nice! I know that Autozone doesnt stock our fuel pump either, and i called a ton of places. Only people who had it were, CarQuest, Pepboys, And Napa i think. And all were listed at 280+

Let me know what you find out.

I found a few for you and they're way under $200! I dont know how close they are to you, but take a look.

www.car-part.com

I found 2 pages worth. Hope this helps.