Max power on single walbro 450 pump?
#17
EvoM Guru
iTrader: (8)
Here is one test with an actual Walbro 400 and 450 E85:
https://www.radiumauto.com/Blog/Post...-Pump-Test-100
They beat the 340 in every single test.
The 400 flows approx 320lph @ 5bar and the 340R flows less than 250lph @ 5bar.
The 450 E85 flows 350lph @ 5bar and the 340R flows less than 250lph @ 5bar.
"Hard to argue with numbers." You keep stretching the facts to support your claim, showing 255 data as 400 and taking the 12v low amp flow numbers of one pump and comparing them to 13.5v high amp flow numbers of another pump.
Come on now.
Here is a Evo centric test that mrfred did with the 400 pump that might be helpful to people: https://www.evolutionm.net/forums/ev...testing-2.html
And another he did with the 400 vs 450: https://www.evolutionm.net/forums/ev...6-testing.html
Last edited by razorlab; Aug 29, 2015 at 10:13 AM.
#19
So you are walbro fan I take it who won't even bother to read the data or thread. So I'll give you cliff notes they took 4 pumps and sent them to a 3rd party fuel testing lab 255 falls on its face under boost the aeromotive owns it on pump gas. And yet the 400lph is just as ****ty heres some more proof.
http://www.dynosty.com/2011/08/walbro-400-fuel-pump/
http://www.dynosty.com/2011/08/walbro-400-fuel-pump/
I went 9's in a full weight Evo on a single pump. You do the math. Enough said.
Go ahead and punch the pressure relief valve down on the walbro 255 and re-test it against the A340. Stop digging on the net for 3rd party data, I have real world results.
Here is a secret. If you want a legit 700hp+++ out of a walbro 450 (E85) you must re-wire the pump with a dedicated ~10awg power AND ground. Would you put a 6766 on a stock exhaust? I think not. Same reasoning. Also, you MUST bypass the internal fuel filter and run a dedicated ~-6an feed line to an aftermarket fuel rail with some 2000cc++ injectors.
This is not new data, the walbro E85 pump is actually OEM equipment on many high horsepower OEM vehicles, and when the voltage is increased the flow does as well. (think 15-17vdc)
Last edited by SiriusEvo; Sep 2, 2015 at 02:07 PM.
#20
Former Sponsor
iTrader: (94)
Here is a secret. If you want a legit 700hp+++ out of a walbro 450 (E85) you must re-wire the pump with a dedicated ~10awg power AND ground. Would you put a 6766 on a stock exhaust? I think not. Same reasoning. Also, you MUST bypass the internal fuel filter and run a dedicated ~-6an feed line to an aftermarket fuel rail with some 2000cc++ injectors.
I didn't ask him about bypassing the internal fuel filter on the 450, but it's a good question.
#21
Bro
Beyond these tests; take it from me. That wally 450 will do some work if setup properly.
Last edited by SiriusEvo; Sep 6, 2015 at 04:57 PM.
#22
With this pump they don't say wether it Will or won't they just say the recommend a double pumper. I appreciate the help as always guys
#23
EvoM Guru
iTrader: (1)
Run a 6an feed line and it should do it.
#24
I currently have a single modded wally 255hp pump making 586/570 and it is maxed out. More duty IDC and Afr stays the same.
That's got to be some kind of record on a single 255 with e85.
My question is,
What kind of power can a single 450 support?
I'm still running factory lines, hanger, fpr, wiring, relays so I really prefer not switching to a dual setup.
That's got to be some kind of record on a single 255 with e85.
My question is,
What kind of power can a single 450 support?
I'm still running factory lines, hanger, fpr, wiring, relays so I really prefer not switching to a dual setup.
#25
#26
EvoM Guru
iTrader: (1)
Why no? It's really simple. Just an adapter fitting for the fuel rail inlet, and 6an quick release fitting for the fuel sender. My car made 565whp VD at 80-85% duty cycle with 1650's and the walbro 450. The 2150's will help, but idk when the pump is going to run out of fuel.
It also depends on how much boost you have to run. More boost equals higher fuel pressure, which means the pump flows less.
It also depends on how much boost you have to run. More boost equals higher fuel pressure, which means the pump flows less.
#27
Why no? It's really simple. Just an adapter fitting for the fuel rail inlet, and 6an quick release fitting for the fuel sender. My car made 565whp VD at 80-85% duty cycle with 1650's and the walbro 450. The 2150's will help, but idk when the pump is going to run out of fuel.
It also depends on how much boost you have to run. More boost equals higher fuel pressure, which means the pump flows less.
It also depends on how much boost you have to run. More boost equals higher fuel pressure, which means the pump flows less.
#28
EvoM Guru
iTrader: (1)
If it takes that much boost, you may run out of pump due to the increased fuel pressure reducing pump flow.
#29
2.4 stroker
Stock port head with bc 272
Stock intake manifold and tb
Pre 880 injectors on 93
Walbro 255
Buschur cop kit
3' ets intercooler
New set up
2.4 stroker
Curt Brown head with gsc billet r2's
Curt Brown intake and tb
Fic 2150
Walbro 450 with stm braided line from the firewall
Buschur cop kit
4' ets intercooler
So I made some substantial improvements in the air flow of the setup, so it might not take 35psi from the 35r. I know curt made 655 iirc on a 35r
#30
EvoM Community Team Leader
If your riding on the edge, there are companies that sell voltage boosters for the fuel pump. From what I have heard most fuel pumps really improve from increased voltage. I would think increased voltage would especially help at higher line pressure too. I believe some mfg's publish their flow numbers at higher voltages as well.