Walbro 400LPH intank pump ? Anyone got any info
im running a homemade parallel twin pump setup, and has worked fine for the past 3 yrs.
this 400lph setup intrigues me though. any adverse side effects if i were to run the 400lph intank, and fed it to a 255lph external, inline?
this 400lph setup intrigues me though. any adverse side effects if i were to run the 400lph intank, and fed it to a 255lph external, inline?
I would use this as a lift pump only to something as serious as a pair of 044 pumps. Otherwise I would run that pump alone. I would like to see a 400lph inline as well to split the load between the two pumps for high fuel pressures.
A single 255 pump will flow a LOT more feeding a second pump than having to pump against a fuel pressure regulator. The second pump will practically pull the fuel out of the lift pump. Thats why a lift pump can be much smaller than a primary pump.
from this post it seems it'd be beneficial for the 400lph pump to have the 255 in front of it, inline?
only reason i'm bringing this up is because my car is putting down anywhere from 600-670hp (no idea, i dont use dyno's, just shooting a realistic number from experience) depending on how much boost i run using e85 and 1680cc inj...so i'd be near the edge of maxing out the 400 by itself. but if the inline 255 would help even a little bit, i'd like to use it.
https://www.evolutionm.net/forums/ev...ification.html
Yes a FPR is recommended
I just got a phone call about the test we had performed on the EVO8-9 sending unit with the 400lph pump in it. I am shocked to say the difference in the pump by itself and installed is small. I expected to find the stock housing very restrictive with that pump in it, it is not.
I will post up some numbers when the actual sheets get back here in my hand, for now though, know that it flows well even in the stock housing.
I will post up some numbers when the actual sheets get back here in my hand, for now though, know that it flows well even in the stock housing.
Was there ever a doubt? STM proved this to be true a couple of weeks ago when they made 580whp on their Mustang dyno on E85 with this pump in the stock housing. It should be sufficient for nearly 650whp dynojet on E85. Anyone on 93oct only will be set for good with this pump.
Was there ever a doubt? STM proved this to be true a couple of weeks ago when they made 580whp on their Mustang dyno on E85 with this pump in the stock housing. It should be sufficient for nearly 650whp dynojet on E85. Anyone on 93oct only will be set for good with this pump.
Signal to noise. Think about it more.








