walbro 255lph pump
10-31-2013, 10:56 AM
#1
walbro 255lph pump
Does anyone know what is the horse power limit of the walbro 255lph? I currently have a walbro 255lph (GSS342) and I wanted to upgrade my car and was wondering how far can the walbro stretch
11-01-2013, 09:14 AM
#4
I've seen Supra's get into the mid 500's on a single Walbro 255 and up into the 600's with two. Of course there is no "max hp rating", per se as it's all just dependent on each particular setup, injectors, duty cycle etc. Suffice it to say I'm sure no Maxima will ever approach maxing out the Walbro
11-01-2013, 10:28 AM
#5
Yes u seen supras get up to 650 but like i said get bigger fuel lines and it can happen its been advertise like for 350z stage 1 or 2 fuel kit upgraded lines can make up to 650 ,700 on a 255 but 8an fuel line and 6an return line.
Maybe the dw 320 is plug in play but i dont know.i have walbro 400 and u have wire it drectly to the battery with a relay along with bigger fuel lines.because it will not work with our cars not enough voltage.
Maybe the dw 320 is plug in play but i dont know.i have walbro 400 and u have wire it drectly to the battery with a relay along with bigger fuel lines.because it will not work with our cars not enough voltage.
11-01-2013, 11:52 AM
#8
Thanks for the replies guys I did a google search and found a site that said the 255lph is good for about 500hp and theres a walbro 400lph thats good for over 500hp
http://www.full-race.com/store/fuel-...ro-400lph.html
http://www.full-race.com/store/fuel-...ro-400lph.html
11-01-2013, 11:57 AM
#9
I've seen Supra's get into the mid 500's on a single Walbro 255 and up into the 600's with two. Of course there is no "max hp rating", per se as it's all just dependent on each particular setup, injectors, duty cycle etc. Suffice it to say I'm sure no Maxima will ever approach maxing out the Walbro
11-01-2013, 02:35 PM
#10
I run a Walbro 418 ( also called 450H for E85) that is the largest in-tank pump I could find for E85 and gasoline. Chances are you won't use all of its capacity. The 255 ran out of capacity early in my E85 program - of course, E85 takes about 30% more volume than gasoline for a given HP, depending on which fuel you use and its specific gravity.
Fuel lines are 6AN at the rear, supply and return, going into 1/2" hard copper under the car then back to 6AN lines to the 1500 hp Aeromotive stainless filter and 6AN lines to each fuel custom fuel rail and nitrous solenoid, and 6AN back to the Aeromotive FPR then 6AN / 1/2" hard copper back to the tank.
I got pressure and volume enough.
Fuel lines are 6AN at the rear, supply and return, going into 1/2" hard copper under the car then back to 6AN lines to the 1500 hp Aeromotive stainless filter and 6AN lines to each fuel custom fuel rail and nitrous solenoid, and 6AN back to the Aeromotive FPR then 6AN / 1/2" hard copper back to the tank.
I got pressure and volume enough.
Last edited by grey99max; 11-01-2013 at 02:42 PM.
11-01-2013, 02:58 PM
#11
Thanks for the replies guys I did a google search and found a site that said the 255lph is good for about 500hp and theres a walbro 400lph thats good for over 500hp
http://www.full-race.com/store/fuel-...ro-400lph.html
http://www.full-race.com/store/fuel-...ro-400lph.html
How much power u looking to make spraying or fi or both.
11-01-2013, 03:07 PM
#12
I run a Walbro 418 ( also called 450H for E85) that is the largest in-tank pump I could find for E85 and gasoline. Chances are you won't use all of its capacity. The 255 ran out of capacity early in my E85 program - of course, E85 takes about 30% more volume than gasoline for a given HP, depending on which fuel you use and its specific gravity.
Fuel lines are 6AN at the rear, supply and return, going into 1/2" hard copper under the car then back to 6AN lines to the 1500 hp Aeromotive stainless filter and 6AN lines to each fuel custom fuel rail and nitrous solenoid, and 6AN back to the Aeromotive FPR then 6AN / 1/2" hard copper back to the tank.
I got pressure and volume enough.
Fuel lines are 6AN at the rear, supply and return, going into 1/2" hard copper under the car then back to 6AN lines to the 1500 hp Aeromotive stainless filter and 6AN lines to each fuel custom fuel rail and nitrous solenoid, and 6AN back to the Aeromotive FPR then 6AN / 1/2" hard copper back to the tank.
I got pressure and volume enough.
11-01-2013, 05:26 PM
#13
Im running bascailly ur same pump.execpt not e85 can go on the my 400 running 6an from tank threw a aeromotive fuel filter 10an, but stock return line and single intlet Rail and put and my car When fuel is low strats to shut off everytime i give it gas right before the e line.so iv been thinking of changing it to my lines making my 6an line to a return and 8an from Ramiro a dual inlet 6an and out to fpr back to the 6an return line.
11-01-2013, 08:22 PM
#14
Just boost and aiming for 500+ whp but I want to be prepared for it fuel support wise. So you had to run bigger size fuel lines for this pump?
11-01-2013, 08:25 PM
#15
I run a Walbro 418 ( also called 450H for E85) that is the largest in-tank pump I could find for E85 and gasoline. Chances are you won't use all of its capacity. The 255 ran out of capacity early in my E85 program - of course, E85 takes about 30% more volume than gasoline for a given HP, depending on which fuel you use and its specific gravity.
Fuel lines are 6AN at the rear, supply and return, going into 1/2" hard copper under the car then back to 6AN lines to the 1500 hp Aeromotive stainless filter and 6AN lines to each fuel custom fuel rail and nitrous solenoid, and 6AN back to the Aeromotive FPR then 6AN / 1/2" hard copper back to the tank.
I got pressure and volume enough.
Fuel lines are 6AN at the rear, supply and return, going into 1/2" hard copper under the car then back to 6AN lines to the 1500 hp Aeromotive stainless filter and 6AN lines to each fuel custom fuel rail and nitrous solenoid, and 6AN back to the Aeromotive FPR then 6AN / 1/2" hard copper back to the tank.
I got pressure and volume enough.
11-02-2013, 01:02 AM
#16
Yeah, that pump moves some serious volume of fuel - if you open up all the lines and filter. It does take some work to get it to fit in the tank pump carrier as well. But - this is what you gotta do to move lots of fuel. I also connected a 40 amp relay to the original pump wires and ran a fused 10 gauge battery buss wire back to the tank and connected it to the new relay, so that when the car is started, the battery voltage (13.8 volts) is right on the new Walbro pump.
Last edited by Max streets; 11-02-2013 at 01:05 AM.
11-02-2013, 01:15 AM
#17
Yes i have mines Wired up like that i had a 30 amp fuse it blew out and I put a 40 amp fuse and its been good ever since.so my ? Is have u ever had it close to the e line and pump just pumps so much that car just shuts off When close to the e line .could it be cause my stock return line.i have to keep more than a quarter tank to Drive my anything lower than that car starts shutting off while crusing.
Sounds like you didn't use a Nissan fuel pump sock.
Common Walbro issue if you used their sock.
11-02-2013, 04:04 AM
#18
11-02-2013, 09:54 AM
#19
DW 440cc. I made sure that everything I put in the fuel circuit is E85 compatible. All AN lines are NOS teflon, Aero FPR, both nitrous fuel solenoids, Aero fuel filter are all E85 compatible, including the big Walbro pump and the inside-the-tank mods...
11-02-2013, 09:55 AM
#20
11-02-2013, 10:02 AM
#21
Yes i have mines Wired up like that i had a 30 amp fuse it blew out and I put a 40 amp fuse and its been good ever since.so my ? Is have u ever had it close to the e line and pump just pumps so much that car just shuts off When close to the e line .could it be cause my stock return line.i have to keep more than a quarter tank to Drive my anything lower than that car starts shutting off while crusing.
11-02-2013, 10:27 AM
#22
For that monster in-tank pump, a stock fuel line in either direction is too small - I think the pump cavitates inside (makes bubbles, doesn't move fuel) if the flow isn't large enough. Actually, the 6AN lines could be too small if you don't get the NOS lines - they had a larger ID than the other 6AN lines I looked at.
11-02-2013, 10:41 AM
#23
Random link to the E85 WalbroLPH pump:
http://www.supraforums.com/forum/sho...ed-400LPH-Pump
11-02-2013, 07:48 PM
#24
So do you guys think the dw320 will be good on the stock lines? And what exactly are you guys wiring up? And when you use a 40amp fuse is it in the stock fuse panel on driver side just replaced with a 40amp fuse?
11-03-2013, 01:42 AM
#25
By the way u sound u say 255 isn't enough for u.u gotta pay play so yes most likely. U need bigger lines,and a fuel rail will make it even easier.
11-03-2013, 08:14 AM
#26
I have my 40amp at the battery, u need strong current to run a 400,from the a direct power to a external relay at the pump conected to the stock relay.
By the way u sound u say 255 isn't enough for u.u gotta pay play so yes most likely. U need bigger lines,and a fuel rail will make it even easier.
By the way u sound u say 255 isn't enough for u.u gotta pay play so yes most likely. U need bigger lines,and a fuel rail will make it even easier.
11-03-2013, 09:00 AM
#27
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