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Fuel Pump Choice

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Old 06-09-2018, 10:59 PM
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belairbrian
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Default Fuel Pump Choice

I noticed the fuel pump is getting loud. In fact I never really heard it before today. Coming home I could hear it humming.

Since it's quite likely the original pump, and the pump is one of those things that will leave you sitting on the side of the road, I was thinking about swapping it out with a Racetronix kit just for Preventive maintenance.

The question is 180 LPH or 255 LPH. Is there anything gained by the 255.

Car is stock 92 LT1, not tracked or raced.
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Old 06-09-2018, 11:33 PM
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1993C4LT1
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Holy sht I just went through a whole ordeal with racetronix. They don't know what they sell. If you want to buy from them, then do so. But I bought a 255 pump from them. The first in tank harness messed up where it connects to the fuel pump. Wiring was backwards as well. They sent me another, free. OK cool. Wiring was backwards still. I've read others on here switched it. I don't see how they did. But these guys are smarter than me. Look at your bulkhead, mine had small burns on the pins. A racetronix pump will burn the pins even faster than factory.

If you buy the 255 pump, the little rubber seat that the pump sits on has to be cut, where the purge hole is on the pump. If you don't make the cut, the car will not start.

I ended up using a stock pump. I'm happy I did. No performance gains to be had unless you need the extra fuel. With that said, racetronix was of no help to me. But they do include some cool stainless bolts, new gasket and good filter.

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Old 06-10-2018, 03:06 AM
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Originally Posted by belairbrian View Post
I noticed the fuel pump is getting loud. In fact I never really heard it before today. Coming home I could hear it humming.

Since it's quite likely the original pump, and the pump is one of those things that will leave you sitting on the side of the road, I was thinking about swapping it out with a Racetronix kit just for Preventive maintenance.

The question is 180 LPH or 255 LPH. Is there anything gained by the 255.

Car is stock 92 LT1, not tracked or raced.
IDK. I have used Racetronix before with no issues but according to 1993C4LT1, their QC has slipped.

As far as 180 or 255, unless you really need it, I doubt it makes a difference. OTOH, maybe a larger one just in case? Can go either way.

Last edited by aklim; 06-10-2018 at 03:07 AM.
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Old 06-10-2018, 10:37 AM
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Originally Posted by 1993C4LT1 View Post
I ended up using a stock pump. I'm happy I did. No performance gains to be had unless you need the extra fuel.
Plug. Play. Drive.
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Old 06-10-2018, 01:19 PM
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I have GENUINE Walbro 255's in my Typhoon and Syclone. Both pumps are over 20 years old. the Sy's doesn't have much time on it, but sitting is as hard on these pumps as driving them. The Ty;s has over 100K miles on it. Both still working.
BUT I believe (un confirmed) that Walbro has discontinued the GS380 pump that was the standard for use in 80's and 90's GMs like Corvette, Camaro, Grand National, etc.

As for OTC replacement pumps, I have had the best success with Delphi. Airtex in particular, had very poor longevity. I've used other brands, I don't recall any particulars. The Delphi in my DD (same pressures as an LT1) is about 10 years old, and is beginning to be responsible for occasional excessive cranking.

I doubt your pump is original; they just don't last this long. But the increase in noise may be nothing more than its running faster because the filter has become partially restricted. (Yes, pumps run FASTER when they don't have to pump as much volume). If you do change the pump, I'd be inclined to replace it with the same brand as is in it now because you have some idea of the reliability.

My observations with Racetronix go back a LOT further than 93LT1's.
They're junk. Not just the product, but the customer service as well. Not worth the aggravation to even consider those people's products.


Hopefully you fix it the first time, and it stays fixed. There are so many jankey pumps pout there, it's a crap-shoot. Good Luck.
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Old 06-10-2018, 04:35 PM
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Fuel pumps? I believe there's much to be learned about manufacturers. How many are just 're-boxed' with specific branding. TI maybe deserves a 'read'.

https://aftermarket.tiautomotive.com

The majority of the TI pumps are US made. A person doesn't dare even think 'all' as that could change tomorrow.

TI has done Walbro for years (they mention decades) but now market their stuff directly.

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Old 06-10-2018, 04:36 PM
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Originally Posted by ihatebarkingdogs View Post
As for OTC replacement pumps, I have had the best success with Delphi.
Hopefully you fix it the first time, and it stays fixed. There are so many jankey pumps pout there, it's a crap-shoot. Good Luck.
As 1993C4LT1 will most likely agree, this one is not worth over thinking.

Get a factory spec pump (I agree with Delphi) install and don't worry.

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Old 06-10-2018, 09:26 PM
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Help me learn some thing here. Is there a maximum pressure limit?
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Old 06-10-2018, 09:54 PM
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Originally Posted by HAD2HAV2 View Post
Help me learn some thing here. Is there a maximum pressure limit?
Yes and it is enforced by your fuel pressure regulator. Regulator will "close" to build up pressure to a set point and "open" to release pressure past a set point. Bigger motor needs more volume which the bigger pumps provide.
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Old 06-13-2018, 11:27 PM
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alright one more question. pulsator or replace it with submersible hose?

If hose what size?
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Old 06-14-2018, 12:48 AM
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1993C4LT1
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No pulsator!! Not sure, but I can measure the extra hose I have laying around tomorrow.
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Old 06-14-2018, 06:33 AM
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Originally Posted by belairbrian View Post
alright one more question. pulsator or replace it with submersible hose?

If hose what size?
In the past 5/16 is mentioned. If you use Gates 27083 or 27093 as a spec reference you should end up with correct product. Your pump likely came with a hose that you could use as a matching inside dimension.

What pump brand/part # did you end up buying? Local purchase I'd think?

Last edited by WVZR-1; 06-14-2018 at 06:44 AM.
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Old 06-14-2018, 12:32 PM
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The TPI pumps are 5/16". The low pressure TBI pumps are 3/8". Another indication that you have the correct pump for applications like trucks and some passenger cars (F-body) that use both styles depending on engine.
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Old 06-14-2018, 01:20 PM
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Originally Posted by 1993C4LT1 View Post
Holy sht I just went through a whole ordeal with racetronix. They don't know what they sell. If you want to buy from them, then do so. But I bought a 255 pump from them. The first in tank harness messed up where it connects to the fuel pump. Wiring was backwards as well. They sent me another, free. OK cool. Wiring was backwards still. I've read others on here switched it. I don't see how they did. But these guys are smarter than me. Look at your bulkhead, mine had small burns on the pins. A racetronix pump will burn the pins even faster than factory.

If you buy the 255 pump, the little rubber seat that the pump sits on has to be cut, where the purge hole is on the pump. If you don't make the cut, the car will not start.

I ended up using a stock pump. I'm happy I did. No performance gains to be had unless you need the extra fuel. With that said, racetronix was of no help to me. But they do include some cool stainless bolts, new gasket and good filter.
I, too had to switch polarity on my Racetronics pump. There was a notation in the instructions that this might be the case. I wonder if all their Corvette pumps are the reverse polarity. If that's the case, then it seems the harness should be Corvette specific. Anyway, I switched the positive and negative and all was well. Just be forewarned.
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Old 06-14-2018, 08:03 PM
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Originally Posted by WVZR-1 View Post
In the past 5/16 is mentioned. If you use Gates 27083 or 27093 as a spec reference you should end up with correct product. Your pump likely came with a hose that you could use as a matching inside dimension.

What pump brand/part # did you end up buying? Local purchase I'd think?
Went with the Delphi FE0114. No one had it in stock locally so I ordered it. That's why I was asking about the hose size. Wanted to have everything at one time.
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Old 06-14-2018, 08:32 PM
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The upper hose on the sending unit was a massive pain for me to take off.
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Old 06-14-2018, 08:37 PM
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Originally Posted by belairbrian View Post
Went with the Delphi FE0114. No one had it in stock locally so I ordered it. That's why I was asking about the hose size. Wanted to have everything at one time.
This I understand is an effective way to determine that a Delphi pump is 'correctly' packaged. I've never used a Delphi but a 'parts guy' pointed this out

http://www.tgidirect.com/sqlimages/d...-pdfs/1344.pdf
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Old 06-14-2018, 09:51 PM
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Originally Posted by belairbrian View Post
Went with the Delphi FE0114. No one had it in stock locally so I ordered it. That's why I was asking about the hose size. Wanted to have everything at one time.
I purchased that pump last year and it included the hose and clamps in the package.
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Old 06-15-2018, 10:56 AM
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[QUOTE=ihatebarkingdogs;1597376838]I doubt your pump is original; they just don't last this long. But the increase in noise may be nothing more than its running faster because the filter has become partially restricted. (Yes, pumps run FASTER when they don't have to pump as much volume). If you do change the pump, I'd be inclined to replace it with the same brand as is in it now because you have some idea of the reliability./QUOTE]

My '90 with 50K+ still has the original pump. I've never even heard it. What are early signs of impending failure?

A grease pit jockey pulled it out of the tank when the Multecs were starting to fail, and put it back when it wasn't the problem. That was 6 years ago so I guess he didn't screw it up....but??
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Old 06-15-2018, 07:42 PM
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Hello BelairBryan!

Most street driven Corvettes probably don't need the higher volume of fuel that these aftermarket pump are capable of supplying.
The 255 Liters per hour rating is capable of larger volumes of fuel at the pressure set by the regulator. If your car doesn't need the gas then it goes back to the tank via the return line The pressure regulator sets the pressure and the 255 pump just sends more fuel than the 180 pump at the same pressure.

If installing the higher flow pump requires electrical modifications I would be careful in your decision, can it be undone? If your car really needs the extra fuel then by all means buy the 255 pump from Racetronix or whomever and make the proper changes.

I have the standard pump from NAPA and it works fine. I also bought a new assembly that holds the fuel pump with the new fuel gauge sender from Rock Auto.

If I were doing anything with my fuel pump currently I would be considering purchasing the new HOLLEY "HydraMat" to put in place of the silly little sock on the fuel pump intake side. The HydraMat is incredible stuff and would really be helpful with our older Corvettes.

K.I.S.S. Bryan
The last "S" stands for silly, please do not be offended. This is something in which I really try to apply in my life.
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