Fuel pump questions

[4seasons69]

Okay I've been playing with the idea of switching fuel pumps. I kinda want to make sure I don't run out of fuel pump on the dyno when she's getting tuned. Now I have ford gt pumps which are basically not much better than walbro 255s.

Now onto the questions. How much power do you guys think these pumps can support?

I've been looking into the walbro 400s but have recently been finding info that these are gas only pumps and not to use them with e85? anyone know how they would handle e85?

Now the walbro 450 is the e85 version of the 400 quite a bit more expensive but seems to be one hell of a pump. Now my question on this is with dual in tank pumps can you run a larger pump and a smaller pump? Or will will the larger pump overrun the smaller pump and make the smaller pump not effective?

I ask this because I don't think I would need the fuel 2 450s would supply and for the price of two 450s I would just get a boost a pump instead

Also anyone have any experience with dw300 or aeromotive stealth 340 pumps? My next idea was switching to twin dw300s or stealth 340s

Any fact based info and opinions are appreciated. Sorry for rambling lol.

[CornFed2.4]

From what I've heard the dw300 doesn't flow much more than the 255hp. Also I believe Scheides is running the 400 not the 450 or at least he was with little to no issues. He can chime in though.

Also read on tuners that people were having issue with the 450 not flowing what it says it can and maxing the pump out around 600-650. Just what I have read I guessing can try to dig up the tuners link to in the mean time.

[4seasons69]

From what I've heard the dw300 doesn't flow much more than the 255hp. Also I believe Scheides is running the 400 not the 450 or at least he was with little to no issues. He can chime in though.

Also read on tuners that people were having issue with the 450 not flowing what it says it can and maxing the pump out around 600-650. Just what I have read I guessing can try to dig up the tuners link to in the mean time.

Good to know about the dw300. I've seen threads where the 450 was maxing out around 650whp but either way it does flow much more than the pumps I have. My main concern with the walbro 400 is I'm running dual pumps I don't want one to go out because of the e85 and then boom goes my new engine lol.

Do you know if scheides is running dual 400s? Otherwise hopefully he will chime In

[CornFed2.4]

400 pump evo owners just skimming over thread haven't seem an real issues.

http://forums.evolutionm.net/evo-engine-turbo-drivetrain/595327-whos-running-walbro-400lph-fp-4.html

450pump

http://www.dsmtuners.com/forums/bolt-tech/455208-dual-walbros.html

Read post 9 till end of thread

From what gathering you should do a

400 with a Bosch o44 inline.

[CornFed2.4]

I don't think he is. I thought he had a 400 and BAP. But yeah heat chime in.

[4seasons69]

Thanks for the link. It seems most of the people running the inline pump were 2gs which have limited space in the tank. I already have an in tank dual pump set up and mostly looking for something I can just drop in. Even in that evom thread there was a guy who had issues with the regular 400 on e85. That's enough to keep me away from the dual 400s. Just not worth the risk for my investment.

So right now the options are keep my pumps and see what they do, replacing one of my pumps with a wally 450, twin aeromotive 340s, or adding a boost a pump to my current pumps

[4seasons69]

I guess you can throw the treadstone 340 in the mix too. It's kind of cheap so sounds a little too good to be true lol

[CornFed2.4]

What about a 450 feeding a inline Bosch 044?

[4seasons69]

What about a 450 feeding a inline Bosch 044?

It's a good idea but right now I want to keep costs as low as possible and change as little as possible. Plus with the cost of both those pumps plus other supplies to convert my setup I could just buy a twin pump bap

[CornFed2.4]

I just read on 3 different boards people were achieving 700+ with 255 Wally's in parallel. So I'd try your pumps first. Then go from there.