Murlo26
10-22-2012, 12:47 PM
His is nice, simple and effective...no silly surgetanks, dual-pump hangars, etc. :)
I have been trying to KISS.
The car has a standard Walbro 400 pump (non-e85) in the tank powered by a 30A BAP that's activated at ~3psi (whatever the default hobbs switch is in that kit). The return line siphon is drilled out to 2.8mm to help reduce base fuel pressure. That feeds stock lines up to the fuel rail, where I have a Boomba fuel rail (with a bent stock FPR) feeding FIC 1680cc injectors. On this setup I have base fuel pressure under 50psi and it's enough on real e85 to support 32psi across the board. The car idles, runs, and drives nearly perfect nearly all the time.
I've had my fair share of issues...the FIC's I needed revised spacers and wiring adapters, my DW300 didn't do much more than a W255 would have, and I had problems getting my stock FPR to fit on the boomba fuel rail the way I wanted it to (all documented earlier in this thread if you ever feel like going waaay back).
Also, at 1/3 tank or less WOT is risky--I can do a 2nd OR 3rd OR 4th gear pull, but anything like a 2-3-4 results in massive fuel starvation. On the cruise I took a risk and did hit 14:1 AFR at 8000rpm with four people in the car after a 2-3-4-5 pull. Others want to fix it (and I do too) but otherwise I just keep the tank above 1/2 tank if I really want to rip on it more than a full gear pull. The cup/basket that sits around the fuel pump simply runs empty too quickly...it's stupid but it is what it is. Making a larger (baffled) basket or moving to a surge tank is the way to go if you track the car or absolutely want to run WOT while it's on E but frankly I have no need so I don't bother or worry about it :)
I've proven now that this setup is enough for me so I don't plan on changing it. If I do anything, it'll be to swap in a E85 version of the W400 but then my base fuel pressure may suffer. I'd consider ditching the BAP and installing a larger feed line as that seems to be working for murlo...I almost did it last summer but this setup has proven to be enough so I'm happy.
His setup is effective, but still suffers the same thing mine does. Which is at lower fuel levels the basket empties as its no longer submersed in the fuel and relies purely on the pick from in tank.
I think you make it way too simple (kracka). The only true perfect setups I have seen are surge tank setups and fuel cell setups. I am holding off as mine works great for my power as long as I keep it ~1/3 and up like Scheides said.
But a bunch of the crap is just inherit to the X design. I will say my double pumper was much more complicated and didn't work nearly as well.
I am glad Scheides' setup is working well though and it works well enough because he did keep it as simple as he could.
still not straight forward for us E85 users making bigger power.
I have been trying to KISS.
The car has a standard Walbro 400 pump (non-e85) in the tank powered by a 30A BAP that's activated at ~3psi (whatever the default hobbs switch is in that kit). The return line siphon is drilled out to 2.8mm to help reduce base fuel pressure. That feeds stock lines up to the fuel rail, where I have a Boomba fuel rail (with a bent stock FPR) feeding FIC 1680cc injectors. On this setup I have base fuel pressure under 50psi and it's enough on real e85 to support 32psi across the board. The car idles, runs, and drives nearly perfect nearly all the time.
I've had my fair share of issues...the FIC's I needed revised spacers and wiring adapters, my DW300 didn't do much more than a W255 would have, and I had problems getting my stock FPR to fit on the boomba fuel rail the way I wanted it to (all documented earlier in this thread if you ever feel like going waaay back).
Also, at 1/3 tank or less WOT is risky--I can do a 2nd OR 3rd OR 4th gear pull, but anything like a 2-3-4 results in massive fuel starvation. On the cruise I took a risk and did hit 14:1 AFR at 8000rpm with four people in the car after a 2-3-4-5 pull. Others want to fix it (and I do too) but otherwise I just keep the tank above 1/2 tank if I really want to rip on it more than a full gear pull. The cup/basket that sits around the fuel pump simply runs empty too quickly...it's stupid but it is what it is. Making a larger (baffled) basket or moving to a surge tank is the way to go if you track the car or absolutely want to run WOT while it's on E but frankly I have no need so I don't bother or worry about it :)
I've proven now that this setup is enough for me so I don't plan on changing it. If I do anything, it'll be to swap in a E85 version of the W400 but then my base fuel pressure may suffer. I'd consider ditching the BAP and installing a larger feed line as that seems to be working for murlo...I almost did it last summer but this setup has proven to be enough so I'm happy.
His setup is effective, but still suffers the same thing mine does. Which is at lower fuel levels the basket empties as its no longer submersed in the fuel and relies purely on the pick from in tank.
I think you make it way too simple (kracka). The only true perfect setups I have seen are surge tank setups and fuel cell setups. I am holding off as mine works great for my power as long as I keep it ~1/3 and up like Scheides said.
But a bunch of the crap is just inherit to the X design. I will say my double pumper was much more complicated and didn't work nearly as well.
I am glad Scheides' setup is working well though and it works well enough because he did keep it as simple as he could.
still not straight forward for us E85 users making bigger power.