Walbro fuel pumps 190 or 255l???
09-16-2017, 06:36 PM
#1
Burning Brakes
Thread Starter
Walbro fuel pumps 190 or 255l???
I have two new fuel pumps on hand. Not sure which one to use on stock 93 lt1.
Both are no longer produced.
Walbro GSS242M 190l@43.5 psi, the other isGSS340M 255@43.5 psi.
There are no plans for any engine modifications. I do use a aerovent adjustable fuel pressure regulator.
Is the 190 still larger than the oem?
Both are no longer produced.
Walbro GSS242M 190l@43.5 psi, the other isGSS340M 255@43.5 psi.
There are no plans for any engine modifications. I do use a aerovent adjustable fuel pressure regulator.
Is the 190 still larger than the oem?
09-17-2017, 05:52 PM
#4
Tech Contributor
I bought a racetronix 255 with hotwire kit earlier this year, i think it was about $160. It's on their website all over the place that their 255 shouldn't be run on stock wiring.
There are definitely people out there that are running them on stock wiring though.
Take it for what its worth
There are definitely people out there that are running them on stock wiring though.
Take it for what its worth
09-18-2017, 12:00 AM
#5
Burning Brakes
Thread Starter
I have both pumps that are new. The one that is currently in there is a Delphi FE0111 and has been for 5 or 6 years. When I was checking on it one site said that was not for a lt1. It was rated at 165l@58 psi. That should be pretty close to 190@43.5psi.
Will install the 190 and hopefully that will stop the gauge from bouncing all over.
Will install the 190 and hopefully that will stop the gauge from bouncing all over.
09-18-2017, 12:01 AM
#6
Burning Brakes
Thread Starter
I have both pumps that are new. The one that is currently in there is a Delphi FE0111 and has been for 5 or 6 years. When I was checking on it one site said that was not for a lt1. It was rated at 165l@58 psi. That should be pretty close to 190@43.5psi.<br />Will install the 190 and hopefully that will stop the gauge from bouncing all over.
09-18-2017, 03:59 AM
#7
Burning Brakes
Thread Starter
I have both pumps that are new. The one that is currently in there is a Delphi FE0111 and has been for 5 or 6 years. When I was checking on it one site said that was not for a lt1. It was rated at 165l@58 psi. That should be pretty close to 190@43.5psi.<br />Will install the 190 and hopefully that will stop the gauge from bouncing all over.
09-18-2017, 11:08 AM
#8
Tech Contributor
As far as I know, people who run 255's on the stock wiring to the tank install a bigger fuse. (20 Amp?)
Hotwire Kit seems like a good idea if you're going to run larger than stock. God knows I don't want my car to burn to the ground because some 30 year old wiring got hot and melted the insulation off
Hotwire Kit seems like a good idea if you're going to run larger than stock. God knows I don't want my car to burn to the ground because some 30 year old wiring got hot and melted the insulation off
09-18-2017, 04:05 PM
#9
Burning Brakes
Not just wiring inside the tank. Installing a larger fuse is not a good idea. My stock wiring failed between the firewall and the passenger door. It burned the FP power wire and melted the connector. The wiring kit that runs from the alternator to the tank is a good thing.
09-18-2017, 04:14 PM
#10
Burning Brakes
Thread Starter
Just rechecked my pressure and was ok engine idled smoothly with the delphi unit. I will have to check it after it is driven. Perhaps the pump is getting bad and symptoms are intermittent after it is warmed up. Toss up yet which one to use.
09-18-2017, 06:14 PM
#11
Burning Brakes
Thread Starter
I've used both of these pumps on Syclones and Typhoons. The 255 is a great pump, I've had one in my Typhoon for 20 years, it just runs. I have a 190 in my Syclone since 2004 and it's fine too.
The comment regarding wiring and current draw is a good observation. The 255 can burn connectors in OEM wiring. The 255 should probably be used with a "hot wire" kit from Racetronics, or make one yourself. The thru-tank connector can still burn though. Use a new in-tank harness at the least.
The 190 is more than adequate for a stock LT1. Its current draw is less than the 255 and is unlikely to cause problems with the OEM wiring. If the 255 is no longer in production (news to me, but also a bummer because I still work on SyTy's and the 255 has been the staple pump for them since the mid 90's)), I'd save it for something that needs the additional fuel flow.
The comment regarding wiring and current draw is a good observation. The 255 can burn connectors in OEM wiring. The 255 should probably be used with a "hot wire" kit from Racetronics, or make one yourself. The thru-tank connector can still burn though. Use a new in-tank harness at the least.
The 190 is more than adequate for a stock LT1. Its current draw is less than the 255 and is unlikely to cause problems with the OEM wiring. If the 255 is no longer in production (news to me, but also a bummer because I still work on SyTy's and the 255 has been the staple pump for them since the mid 90's)), I'd save it for something that needs the additional fuel flow.
09-18-2017, 06:18 PM
#12
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I run the Walbro 255 with stock wiring on my car, and did so on the 86 beforehand.
I would rather run the Racetronix wiring, but they can't figure out why their relay doesnt want to work in my vehicle.
I would rather run the Racetronix wiring, but they can't figure out why their relay doesnt want to work in my vehicle.
09-28-2017, 11:30 PM
#13
Burning Brakes
Thread Starter
I installed the 190l pump. The wiring kit is larger gauge wires. I also enlarged the vent hole in the side of the filler neck slightly. Maybe that will make it fill easier when it gets near the top.