fuel pump question

Reply Subscribe

Thread Tools

Search this Thread

Jun 9, 2009 | 09:21 AM

mike4089

Thread Starter

Teching In

Joined: Nov 2008

Posts: 17

Likes: 0

fuel pump question

will this fuel pump work for my 5.3 going in a blazer...will be mostly stock with a small tune

http://store.summitracing.com/partde...5&autoview=sku

Jun 9, 2009 | 09:36 AM

cooks 7

On The Tree

Joined: Jul 2004

Posts: 148

Likes: 1

From: St. Louis

I don't know anything about that specific pump, but from the specs it looks like it would work, got any more specifics about what kind of setup your running, like return style, tank, regulator, etc.?

Jun 9, 2009 | 11:14 AM

mike4089

Thread Starter

Teching In

Joined: Nov 2008

Posts: 17

Likes: 0

it will be a returnless style, with the corvette fuel filter so it should regulate it at the filter and alow me to run the return off the filter...stock tank using the stock pickup

Jun 9, 2009 | 11:28 AM

bczee

TECH Senior Member

iTrader: (12)

Joined: Jan 2006

Posts: 6,670

Likes: 6

From: Concord, CA

it only has a 5/16 outlet. It has 85psi max, that should be ok.. I would feel better with a 3/8" outlet.. but they say it is EFI rated to 500hp Max

Jun 9, 2009 | 01:07 PM

dpd069

On The Tree

iTrader: (1)

Joined: Mar 2006

Posts: 174

Likes: 0

From: Phoenix, AZ

That pump puts out about 160 LPH - that's kind of weak.

You will run out of pump capacity at 400 or so HP

Why not put a 215 or 240 LPH pump in it and do it once?

Jun 9, 2009 | 03:10 PM

Shawn MacAnanny

TECH Addict

iTrader: (12)

Joined: Jul 2004

Posts: 2,105

Likes: 3

From: Delaware

You can get a WAlbro 255 pump for about that cost why not just go with that? I have a walbro 255 and it has 5/16" inlets and outlets for some reason. I'm positive its a 255.

http://store.summitracing.com/partde...art=VPN-GSL392

Last edited by Shawn MacAnanny; Jun 9, 2009 at 03:31 PM.

Jun 9, 2009 | 04:20 PM

frojoe

TECH Fanatic

iTrader: (10)

Joined: May 2007

Posts: 1,806

Likes: 46

From: Vancouver BC, Canada

Note: it puts out 43gph at free flow... this is not the same flow rate as @ 85psi. Try to google a Pressure vs. Flow graph for this pump, or better yet see if Summit can help you with that. Also as said above, the 5/16" should be a cautionary sign that it might not cut it. I would look for a pump with about 60-70gph of free flow, even if it is going on a 5.3L, not a 5.7 or 6.0 (room to grow for later

)

EDIT: From MSD's website...

"THIS PUMP IS FOR FUEL INJECTION, SPECS ARE AS FOLLOWS.
AT 30PSI 43GPH -> 80PSI 39GPH

...that equates to about 40.6gph @ 58-60psi... I wouldn't say that's enough for an LS motor. I would go with the Walbro 255 for the same(ish) price!