How much power on the stock fuel pump?

[got_boosted]

How much power can the stock fuel pump support? I have a 91 turbo with a Aristo 2JZ with a T04R turbo that will be on the road soon. Until the funds are available, it's going to be running the stock 440cc injectors and low boost (10psi) This really shouldn't much exceed 350whp. Can I get away with running the stock pump until I up the boost?

Thanks,
Collin

 

[OneJoeZee]

bump

Same question. I too will be running my setup on low boost until more fuel mods are done.

 

[got_boosted]

Joe: Responses from the SF version of this thread...

I've personally seen 2 cars that dropped fuel pressure while into boost with a 57 trim ct-26, and the other with a ts04.

The stock pump is ONLY good for the stock turbo.

if anyone has ever monitored a stock pump under full throttle, red line boost. then you'll see a 20psi pressure drop from any stock pump. including the 2jztt pumps. they push 50-60psi (depending on if you have the aeromotive regulator), then drops to 45psi, then 40psi at 7200rpm. that scarry yo!

my dumb ass blew two headgaskets due to an old failing stock fuel pump....a walbro is only ~100 bucks.

with that said, replacing the fuel pump is one of the first things i do now.

I'll be upgrading my pump before driving it.

Collin

 

[upgradedsupra]

I have witnessed a few guys run 340 and another at 350 RWHP but the pump was MAXED out. I would say to be safe > 300 and change at most.

Duane

 

[got_boosted]

I have witnessed a few guys run 340 and another at 350 RWHP but the pump was MAXED out. I would say to be safe > 300 and change at most.

Duane

A walbro is cheap enough that I'm not going to take the chance. I don't want to risk all my hard work. Thanks of the input!

Collin

 

[dbsupra90]

my problem with the stock pump is at best its 15yrs old.

it would be one of the first things id replace when doing upgrades.

 

[OneJoeZee]

Good enough for me. I'll leave the boost where it is and upgrade injectors and pump at the same time.

Thanks guys.

 

[Poodles]

is is a "why chance it?" question as the walbro is cheap enough...