walbro 400lph, not plug and play
Joined: Oct 2000
Posts: 1,969
Likes: 16
From: DENVER
Honestly, I was just trying to eliminate variables and I knew that my Walbro worked (had been tuned with it before).
Yea, I've never seen that fuel rail mod done before either. After over $1K in tuning and hundreds of dollars in new parts, I was grabbing at straws and would have tried just about anything to get the car running right
Thread Starter
Registered User
Joined: Oct 2005
Posts: 14,614
Likes: 2
From: Denton, TX
Oh and you have to deplug the wires that plug into the pump itself. The blue wire is + and the black is -; the posts they go to on the pump are labeled.
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Registered User
Joined: Jan 2011
Posts: 299
Likes: 1
From: Oklahoma City
At 65psi base fuel pressure, your injectors are flowing just over 1100cc of fuel. You'll need about 1050cc of fuel for that kind of power on E85. My estimates are a little conservative, so you probably have a few IDC %s more, but not too much.
How about dropping your base fuel pressure back closer to stock and upping your injector size to 1300-1500cc? Your fuel pump will thank you for it.
Registered User
Joined: Aug 2009
Posts: 876
Likes: 0
From: Richmond, VA
At 65psi base fuel pressure, your injectors are flowing just over 1100cc of fuel. You'll need about 1050cc of fuel for that kind of power on E85. My estimates are a little conservative, so you probably have a few IDC %s more, but not too much.
How about dropping your base fuel pressure back closer to stock and upping your injector size to 1300-1500cc? Your fuel pump will thank you for it.
[/quote]
Actually they have a max flow of over 1200cc with that base pressure. I've done the calculations for this with the FB340 pump and i know i am close to its theoretical conservative limit, but FullBlown tells me as well as others that they have made over 500 easily on this fuel combo at these pressure levels. Reality does not always match theoretical calculations. Although I should surely be able to make more power with the walbro 400 i have in there now!
Like S2k-F8 I am leaning towards a possible flow restriction on the feed line...although my inline pro rail already has holes drilled on the side of the inlet fitting. I will be wiring up a pressure sensor hopefully this week so I can get some real logs of what my fuel pressure is doing. I'll test both pumps.
Thread Starter
Registered User
Joined: Oct 2005
Posts: 14,614
Likes: 2
From: Denton, TX
At 65psi base fuel pressure, your injectors are flowing just over 1100cc of fuel. You'll need about 1050cc of fuel for that kind of power on E85. My estimates are a little conservative, so you probably have a few IDC %s more, but not too much.
How about dropping your base fuel pressure back closer to stock and upping your injector size to 1300-1500cc? Your fuel pump will thank you for it.
[/quote]
Actually they have a max flow of over 1200cc with that base pressure. I've done the calculations for this with the FB340 pump and i know i am close to its theoretical conservative limit, but FullBlown tells me as well as others that they have made over 500 easily on this fuel combo at these pressure levels. Reality does not always match theoretical calculations. Although I should surely be able to make more power with the walbro 400 i have in there now!
Like S2k-F8 I am leaning towards a possible flow restriction on the feed line...although my inline pro rail already has holes drilled on the side of the inlet fitting. I will be wiring up a pressure sensor hopefully this week so I can get some real logs of what my fuel pressure is doing. I'll test both pumps.
[/quote]
can't wait for the data
. I maxed out my ID2000's. And (2) 290 pumps. On to an external!