fuel pump upgrade

[ADrugDealer]

I have an 04 gtp running e85, xp cam, headers, 60# injectors, full stack ic, and I desperatly need to upgrade my fuel pump. Which pump should I choose? The zzp one, aem, walbro? Which ones fit the best and will keep up with a 2.8 or smaller:-)

[Max Cook]

Dont get the ZZP one. I went through 2 of them in like a month trying to resolve a fueling issue. I switched to their new AEM pump and it works great. Way better. It supposivly is made to work with E85 too so I highly reccommend it.

[GTPpower]

I would go with a Walbro.

[OH4CompG]

Pm Tengis. He has great pumps at great prices.

[ADrugDealer]

According to intense's website walbro won't fit

[GTPpower]

Why not?

[ADrugDealer]

just isnt listen on the fit page?
"

• 2001-2003 Bonneville with 3800 Series II engine
• 2001-2002 Camaro with 3800 Series II engine
• 2001-2002 Firebird with 3800 Series II engine
• 2001-2003 Grand Prix with 3800 Series II engine
• 2001-2004 Impala with 3800 Series II engine
• 2001-2003 LeSabre with 3800 Series II engine
• 2001-2003 Monte Carlo with 3800 Series II engine
• 2001-2003 Park Avenue with 3800 Series II engine
• 2001-2003 Regal with 3800 Series II engine
• 2001-2003 other applications with 3800 Series II engine that does not use the venturi system. "

[Max Cook]

You dont need the venturi system. You just need a different cannister or drill your cannister to run a pump that doesnt have a venturi. Thats what I had to do. I dont know much about 04+ though so im not sure if theres something else weird in their fuel system.

[GTPpower]

just isnt listen on the fit page?
"

• 2001-2003 Bonneville with 3800 Series II engine
• 2001-2002 Camaro with 3800 Series II engine
• 2001-2002 Firebird with 3800 Series II engine
• 2001-2003 Grand Prix with 3800 Series II engine
• 2001-2004 Impala with 3800 Series II engine
• 2001-2003 LeSabre with 3800 Series II engine
• 2001-2003 Monte Carlo with 3800 Series II engine
• 2001-2003 Park Avenue with 3800 Series II engine
• 2001-2003 Regal with 3800 Series II engine
• 2001-2003 other applications with 3800 Series II engine that does not use the venturi system. "

They don't list it, since 04+ have returnless fuel systems. But, it still works.

[danomite02]

message Paul at PRJPerformance.com. He is the man.

[ADrugDealer]

They don't list it, since 04+ have returnless fuel systems. But, it still works.

What modifications are required?

[GTPpower]

I could be wrong, but I don't think Paul carries a non-venturi pump. It would be worth a check though...he will bend over backwards to help you.

You shouldn't really need any modifications, besides a pump rewire.

[Tengis]

There are no direct replacement 255lph pumps for non-venturi canisters which is why everyone recommends switching to venturi.

[slimguns]

How do I look up of I'm Venturi or not?

[MoarkatsINmuhtrailer]

What do you drive.

[Tengis]

You have the returnless fuel system. Venturi canisters only come in the previous gen Grand Prixs. Ive honestly always kind of felt that using a 97-03 fuel rail and adding a return line is the best option for 04+. You can easily do this for under $35 with a local trip to a junk yard. Ive bought the fuel line and fuel rails in the past super cheap.

Question: is your fueling issue related to pressure dropping off up top? Having a pump that flows more fuel in your returnless system will keep pressure from tapering off but if the issue is your injectors then you would still need to upgrade your injectors.

[ADrugDealer]

The issue is pressure falling off as i get up past 6200rpm.

[slimguns]

What do you drive.

I drive an 03' Impala.

[Damnir]

I wish someone out there actually documented a 2004 conversion. I have no patience for attempting a mod, finding out I need more parts (ie; ordering and waiting forever for it to arrive out of the U.S.) to find out I need something else as well.

I need a grocery list so I can "get 'er done".

[GrandPrixGT300]

Any update on a pump that works for the 04+ returnless system?

Andy