Lingenfelter Fuel Pump

[Bob Eyres]

Lingenfelter offers a replacement TI Walbro fuel pump system for the LT5, shown here:

www.lingenfelter.com/product/L710030390.html

Have any of you guys used this particular one? The price, less than $200, seems reasonable for the whole rig, plug and play.
Any opinions on this brand?

TIA, Bob.

[dredgeguy]

Lingenfelter offers a replacement TI Walbro fuel pump system for the LT5, shown here:

www.lingenfelter.com/product/L710030390.html (http://www.lingenfelter.com/product/L710030390.html)

Have any of you guys used this particular one? The price, less than $200, seems reasonable for the whole rig, plug and play.
Any opinions on this brand?

TIA, Bob.
Bob,
You only get the two fuel pumps with the socks for $200. You can get replacement fuel pumps with the socks for about $25 each from RockAuto.

[tpepmeie]

They are walbro GSS340's if my memory serves. I use them. no problems.

[secondchance]

Quantity in stock says "0".:cheers:

[A26B]

Quantity in stock says "0".:cheers:

Google has lots of them

[Jagdpanzer]

Todd,
Do the Walbro GSS340 pumps fit in place of the OEM pumps without any modifications?


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[tpepmeie]

They are fatter. I had to split the plastic housing to expand it slightly.

[Bob Eyres]

Bob,
You only get the two fuel pumps with the socks for $200. You can get replacement fuel pumps with the socks for about $25 each from RockAuto.

Well Duh, my fault for not reading closely.

On even closer reading, I noticed that Lingenfelter offers a different Walbro pump, (search #710040390), for the LT5. They claim these were used on the legendary twin turbo cars John L. built, back in the day.
I'm always inclined to overkill when replacing stock parts, trying to upgrade instead of just replacing with "factory stock". This sometimes gets me in trouble, but I'm wondering if these high capacity pumps would provide ANY improvement in maintaining reliable, full fuel pressure on a stock LT5?
I think I know what the answer is going to be, but has anyone tried these high capacity versions on a stock LT5?... Results?

[tpepmeie]

I was referring to the high volume pumps, which are the GSS340. I haven't used the other model. Have to say, on a stock LT5, just go with the stock replacement pumps which I think are from a suburban or such.

[Roadster]

This is taken directly from the Walbro Web site......and for a 94 Corvette.... although they did not have a distinction between the LT1 & LT5.....they just listed 5.7L for engine choice....
They list 4 pumps for our application.....but one pump is for E85
It appears that the difference between the GSS340... GSS341......or GSS342 pumps.....are the inlets at the bottom of the pumps...as seen in the illustrations.. And as mentioned the GSS340 is the correct pump.....

http://walbrofuelpumps.com/walbro-gss-fuel-pumps



There has been good and not so good reviews on the pump (from other sources)......the main concerns are that some pumps are not the real thing and some did not last long.....most sellers do have it listed as a "genuine" Walbro pump.....so buyer beware....(of course you can buy directly from Walbro....at a slightly higher price)

And as mentioned.....Rock Auto has at least 6 different pumps to choose from....

[Bob Eyres]

Bob,
You only get the two fuel pumps with the socks for $200. You can get replacement fuel pumps with the socks for about $25 each from RockAuto.

This is what I did. After removing the whole assembly it looked to be in good shape, so we replaced just the pumps with the RockAuto units,(listed on their site as replacements for 91' Corvette 5.7 liter DOHC engine), it has ten pounds more pressure now and runs great. Also replaced the in- line fuel filter too.

Note: Although the car started and ran when those old pumps were running with low pressure, it did not crap out completely. So this led me to believe that it might not be the pumps. (this problem crept up on me, getting worse over time :icon_scra:???: )
But installing two fresh pumps cured another problem that I've had for years, long cranking at start up. The starter always worked for 5-10 seconds before the engine fired.
With the new pumps in there, it fires up immediately when you turn the key.
So, if any of you guys have an LT5 that takes a long time to spark up, even though it "seems to run ok", check the fuel pressure, a feeble fuel pump may be the cause.

BTW, thanks for all the advice, this is a great forum. :thumbsup:

[rkreigh]

Hey folks,


great topic. From what Graham told me the stock pumps are "enough" to feed 700 HP. I just got a code 55 up top and decided it's time to check fuel pressure and replace the pumps and fuel socks.


after seeing the delco pump were 32 each with socks and little "kit" with clamps and stuff, I said, what the hey, time to swap em out.


I did spring for a K&L fuel filter though :>


The walbro 340 is a "big pump" and it seems like just doing the secondary pump might make sense?


the little old 390 LSV has some "room" left at 619 hp, but going overkill on the secondary side of the fuel system makes some sense to me as we've always had a hard time "giving this car enough" fuel to make power up top.


we'll see what she does after a couple of fresh stockers go in. I have 105k miles and 23years on these pumps and socks so I think it's time.


I'm sure the pumps get weaker over time. nothing lasts forever except the LT5

[jss06c6]

Guys, I've got another thread going regarding the sending unit, which I've repaired, but would like to upgrade the pumps before I reinstall. Has anyone used the Racetronix (Walbro) 255?

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[jss06c6]

http://www.racetronix.biz/itemdesc.asp?ic=F20000169

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[jss06c6]

What are the specs on the OEM AC Rochester pumps?[ATTACH]

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[spork2367]

Guys, I've got another thread going regarding the sending unit, which I've repaired, but would like to upgrade the pumps before I reinstall. Has anyone used the Racetronix (Walbro) 255?

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I don't see any reason to upgrade them, but if you do, I'd be interested in the pumps you're taking out of the assembly.