Biggest single fuel pump to replace Walbro 255?
02-12-2018, 06:28 PM
#1
Biggest single fuel pump to replace Walbro 255? I currently have a Walbro 255.
What is the biggest direct replacement that will work with stock fuel lines?
Walbro 450?
Walbro 400?
Racetronix 340?
I know I need a new regulator too, I'll likely get the C5 filter/regulator kit from WS6Store.
What is the biggest direct replacement that will work with stock fuel lines?
Walbro 450?
Walbro 400?
Racetronix 340?
I know I need a new regulator too, I'll likely get the C5 filter/regulator kit from WS6Store.
02-13-2018, 01:55 PM
#8
ModSquad
iTrader: (6)
I just changed my 255 out to a 450. It’s a direct replacement. Pumps are same size, except at the very bottom, the 450 blows out larger. Not a problem for me, as I don’t have a bucket for my pump to sit in.
What I found out the hard way, is that the corvette style regulator/filter will not work with the larger pumps. I ended up at about 75 lbs at the injector with that regulator, and I had to completely re-do my return side, and add a real regulator at the fuel rail under the hood.
I found a couple threads on here to support my findings, after I made the discovery.
What I found out the hard way, is that the corvette style regulator/filter will not work with the larger pumps. I ended up at about 75 lbs at the injector with that regulator, and I had to completely re-do my return side, and add a real regulator at the fuel rail under the hood.
I found a couple threads on here to support my findings, after I made the discovery.
02-13-2018, 09:15 PM
#11
ModSquad
iTrader: (6)
02-13-2018, 09:23 PM
#12
ModSquad
iTrader: (6)
What’s more is that with my new engine install, I had a very hard time trying to get the car to idle/run, with a remote tune from Mast, who usually nails it for me.
I spent a LOT of time over the last month tuning my fuel/spark curves, only to find out it was a fuel pressure issue the entire time. Now I’m in reverse, trying to get the curves back to where we were...chasing my tail really...due to the regulator not being able to handle the pressure.
I’m glad I went the Aeromotive regulator route at the engine, with a return line at this point. It made the pump, which is in tank, much quieter, as though it’s not having to work so hard.
I spent a LOT of time over the last month tuning my fuel/spark curves, only to find out it was a fuel pressure issue the entire time. Now I’m in reverse, trying to get the curves back to where we were...chasing my tail really...due to the regulator not being able to handle the pressure.
I’m glad I went the Aeromotive regulator route at the engine, with a return line at this point. It made the pump, which is in tank, much quieter, as though it’s not having to work so hard.
02-14-2018, 12:19 AM
#15
I run a single aem340 in my tbss. Still using factory returnless setup with the original intank regulator. This pump has done great with a cammed, full bolt on ls2 spraying 200. I would guess at 600+ rwhp. Havnt had any issues. Been in there goin on a year now.
Used 93oct pump fuel only. Cant say with e85.
Used 93oct pump fuel only. Cant say with e85.