LS swap question

[Derek.Matirne]

Gentlemen, gentlemen, lend me your ears.... I have purchased an LS, 5.3 out of a 2001 Suburban... I need to know what inline fuel pump I can use for this motor.... my understanding is I need about 60 psi, I tried the parts store, but they cant find crap without a part number or application... So if anyone knows what vehicle I can get one out of, or a part number I would appreciate it...
Thanks...

[Benny-]

sub'd for info

[Eastonspeedworks]

I bought the fast efi pump with a regulator it's pretty expensive but quiet and works well. You also need to add a return to the tank incase you weren't aware. A lot of guys use the corvette filter/regulator but I don't have a part number for you on that one

[SoCoC10]

I think you are looking for AC Walbro GSL392 inline fuel pump. 255LPH high pressure.

Also you can use the 2002 Corvette fuel filter/regulator to make a return. But, If your fuel rail/system already has a return line I'd recommend you use it.

[Sandemonium]

Originally Posted by SoCoC10

I think you are looking for AC Walbro GSL392 inline fuel pump. 255LPH high pressure. They are around $100. I have one with low miles for $40 if you want it?

Also you can use the 2002 Corvette fuel filter/regulator to make a return. But, If your fuel rail/system already has a return line I'd recommend you use it.

This is what I initially went with, Walbro and corvette regulator, inexpensive and it works well.

Good luck with your swap, you will love it.

[Derek.Matirne]

Thanks for the info... the motor that I have has a regulator built into the fuel rail, so I would assume that it should work, I would just need an inline fuel pump... I have been able to find some info and see some people are using a MPE 16020 from Orileys auto, but it states that it runs 45 PSI... any thought on this?

[FRCvette]

I used Walpro on a LS6 powered street rod I built a few years ago. Worked perfect. If I remember correctly (memory isn't what it used to be) I had to have 58 PSI.

[davepl]

Yep, 58 psi, and NOT vacuum/boost referenced. That factory regulator/filter setup works well. I'm using all aftermarket, because I already had a return-based fuel system, but if I had to start from scratch that's how I'd do it.

[weq92f]

Originally Posted by Derek.Matirne

... I tried the parts store, but they cant find crap without a part number or application...

This is so true. In your case, I'd just tell them 2001 Suburban w/5.3 liter V8! With that, you should find a part number at least and then go from there.

Those kids behind the counter at Auto parts stores don't seem to know anything other than how to look up year/make/model and read what they see on the screen. The old geezers that really do know something are becoming a thing of the past as have reams of parts catalogs and diagrams that used to line the parts counter. I was a parts counter guy back in 1989 while attending college. The job required some skill and knowledge of auto parts/repair, ability to run a lathe to turn rotors and a certain amount of intelligence to not make a fool of yourself when helping out the corporate customers ( the ones who know their $hit and get extended the full discount ).

-klb

[LS short box]

I could be wrong but I think the fuel pressure is regulated in the gas tank. The little device that sits on the fuel rail is some sort of buffer not a fuel pressure regulator. On the 2001 engines did they have one line running up to the fuel rail?

[reaper71]

Yes the little pod on the side of the fuel rail is your regulator, and will not have to run a return line.
I have swapped both styles on 2 different projects for customers the Walbro pump is the best choice for the pump From speedway #960392 (gsl392) 60 psi and the install kit (I recommend will keep pump quiet) #960939 $14.99

Mark...

[67 chevelle]

Originally Posted by weq92f

This is so true. In your case, I'd just tell them 2001 Suburban w/5.3 liter V8! With that, you should find a part number at least and then go from there.
-klb

that would be an in tank pump , he is looking for external

I could be wrong but I think the fuel pressure is regulated in the gas tank. The little device that sits on the fuel rail is some sort of buffer not a fuel pressure regulator. On the 2001 engines did they have one line running up to the fuel rail?

If there is a return line from the fuel rail , the regulator is in it , the rail that is . Newer models without the return [returnless] can use the corvette filter/regulator almost all of us do , great info on ls1tech.com in the conversions and hybrids section

[ls1nova71]

A 2001 truck engine WILL have a return line and the regulator on the fuel rail. As others have said, use a Walbro255 and run the feed line to a fuel filter then the feed line on the fuel rail and the return from the rail back to the tank.

[Willie Makeit]

get in touch with way2lo2 (Boris)

He offers this for the LS swap crowd on his FaceBook page, I'm sure he'd offer the forum the same price.

[Derek.Matirne]

Thanks for all the info guys... I have fired up the motor, and it runs good...