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.

 

friend of mine made 700/450 on a evo x with a 6466 turbo ran out of pump at them numbers

 

Can't compare the two platforms, blackbeast.

 

Why not? The engines and fuel delivery systems are similar in every way that is needed to reference the fueling behaviors of one against another.

 

Run bigger injectors with lower base fuel pressure. This will increase the volume. Upgrade your fuel lines to reduce restriction.

Do you know what your fuel pressure is doing?

On a single 255hp I made 610whp running 2150cc injectors with a BFP of like 35psi and only 20psi of boost.


So the higher the pressure the lower the flow/volume, the 450's have a pressure relief that open as like 95psi I think. So 45psi base + 40psi = pressure relief killing the flow.

 

I definitely agree with you there but I'm running bluemax 1450s right now and I dd the car 300 miles a week. I already have to put up with the very slight "pintle bounce" jitter around 1.3-1.5 ms so I don't even want to try 2150s on pump. I love how smooth and docile the car feels driving around every day. It took work setting it up like that.
My 586/570 was on 30psi and at 33psi it gets scary lean and if I get an fpr and lower the base pressure I'll max the injectors out.
If the 450 will out flow a modded 255 by 100hp I'll get one. If not I'll bite the bullet and go twin.

I have also thought about upgrading the wires for fuel pump relay #3 and the lines but I don't think I make enough power to worry about any of that yet.

 

I was able to run a 9 second pass on a single Walbro 450 on E85.

The fuel pump was losing pressure at the top of 4th gear at 37psi. At 33-35psi the AFR was perfect and was still enough for over 140mph traps.

I would say a properly setup 450, RE-WIRED, and removed/cut internal fuel filter will support ~700whp before being inconsistant.

FWIW, when I had the 450 just dropped in, it maxed out at around 630whp

 

I stopped using the walbro pumps after doing a bit of research. The Walbro falls on its face when boosted and the 340 can handle 780hp

Heres the data to back it up but the Fullblown (aeromotive) 340 will outflow the 450 walbro.

http://realstreetperformance.com/Fue...ison-Test.html

 

that is not a walbro 450 e85 pump they are testing in that link it is a 255

 

searched on here couple weeks ago. found people making 630whp, 690whp, and 750whp on e85 single walbro 450. the 630 wasnt even rewired.

 

I have had both and the 340 is nothing but a glorified 255lph. Again, the 450lph was able to caryy a solid 700whp++, through all gears and loads. On it's own, I havent seen a single 340lph do that in reality.

I'm sure some pumps are different than others but overall the aeromotive is not a comparison imo

 

looks like 600 to 700 just depends on dyno and where you are at.
i would say real numbers dont expect to make more then like 620 on a walbro 450 safely that is.
anything over 600 i would do a double pumper or a double pumper surge tank.

 

750whp on a single 450 is insane. Would love to know how someone pulled that off on E85.

 

I'm willing to bet the new FIC 1650 Hi-Z's or ID1700's will produce better drivability then your bluemax 1450's. Coupled with a 450 and upgraded lines and a rewire you should be able to make a good bit more power

 

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/