umair

Whats the most power i can run on a single walbro 450? I've heard of some people running them with a pretty significant amount of power. I just dont want to go dual pump if its not needed.

thanks

5thgen

http://www.k20a.org/forum/showthread.php?t=186865

I wouldn't say this is the norm, but a couple k series people have made 800+ on a single 450.

A lot will depend on injectors / pressures.

sohc_mshue

What fuel?

umair

E85. Im running 1680cc injectors but plan to upgrade to 2000cc.

AP1Chief

1650s 50 base on a single 450, -8 feed from tank, making 7+ never seen a pressure drop.

throwing some 2150s in soon, and plan on seeing how well the 450 does..


85% ethanol.

riceball777

I have made 620whp for years on E85 with the walbro 450. I know lots of people are making over 700whp on e85with them. I would guess the walbro 450 will support somewhere between 700-800whp on E85 and over 1000whp on race gas.

c_me_go

I am selling my 450 if anyone is interested

LostMarine

i made 730@27psi 6466 with a single 450, id2000's when it ran out of fuel

im selling my FB 340's now if anyone wants them. going to twin 450s to support 1000hp

staylor725

I think anything over 700whp should have a dual pump setup just to be safe, anything under that should be fine depending on injector size. Dw just came out with a dw400 that they claim outperforms the 450, but I don’t know anyone running them yet.

DW400 – DW’s Highest Flowing In-Tank Fuel Pump Available | DeatschWerks, LLC

5thgen

I looked into this pump a little bit. I don't know if they tested a walbro 450, but their numbers are off compared to walbro's 450 chart (which makes their own numbers lose a little credibility for me). It'd be nice to see an independent test of both.