What fuel pump to run

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Codyccg

Not-quite-so-new-guy
Mar 21, 2021
24
15
3
Flint,mi
I was wondering what size of fuel pump I need to run. 5.3 boosted with 7875 turbo Shooting for 7-800whp running e85 have 114lb 1200cc injectors -8feed and -6 return.
 

GroceryGetter83

LS Mafia
Supporting Member
Sep 18, 2018
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Tampa, Florida
I’m running twin walbro 450s, that set up/goal
 
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Injectedcutty

G body LS mafia
Nov 24, 2014
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I ran a cell for years with an Aeromotive A1000 pump, filters and regulator and never had an issue. Recently went back to stock tank for extra trunk space. Running a GN tank, sending unit and stealth 340 pump but my LS isn't boosted yet. Them wally 450's get r done too!
 
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81cutlass

Comic Book Super Hero
Feb 16, 2009
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The biggest thing to look is what is the rated flow at high pressure. If you run 42psi base and 20 psi on top of that you need to look at the flow rate at 62psi.

I'd say 525 walbro if you were doing in tank but since your doing external I'd go AEM380, probably 2 of them.

Honestly an a1000 isn't THAT big. It's like 450lph which is boarderline for where you're at.

I'm not overly a fan of twin pumps because if you have one pump and it fails you shut the engine off but if you have two and one dies you still have some fuel and kapop.

I might go this but literally I think it is twin wally 255's stuck in a housing.


The right answer is a holley brushless but zoinks are they pricey.
 
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64nailhead

Goat Herder
Dec 1, 2014
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The biggest, baddest deal for your goal is a Magnafuel 4303. It can be driven via PWM, which is fabulous - your Term X can handle that. It is not the most street friendly setup though.

The budget program is the twin Walbro 450's (in tank) or AEM 380's (external). I'm running 2 380's as opposed to Chris's twin 450's. Both will get the job done - easy to get parts and setup. If I wasn't such a cheap *ss and was building a strip only car, then I'd be onto using a 4303 without even batting an eyelash at the decision.
 
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Codyccg

Not-quite-so-new-guy
Mar 21, 2021
24
15
3
Flint,mi
The biggest, baddest deal for your goal is a Magnafuel 4303. It can be driven via PWM, which is fabulous - your Term X can handle that. It is not the most street friendly setup though.

The budget program is the twin Walbro 450's (in tank) or AEM 380's (external). I'm running 2 380's as opposed to Chris's twin 450's. Both will get the job done - easy to get parts and setup. If I wasn't such a cheap *ss and was building a strip only car, then I'd be onto using a 4303 without even batting an eyelash at the decision.
Why do you say thw 4303 is not street friendly?
 
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