ryanleiker

iTrader: (2)

I've searched a lot and found some old threads about the Walbro 450 and Walbro 400s and found some people running pumps they thought were 450's, but I was hoping to find some true dyno or track numbers for turbo ls motors running a single real walbro 450 on e85.


My combination is an lq4 with a GT45, Tick custom turbo cam, 80lb injectors, single walbro 450, -8AN line all the way to the rail.

hellbents10

iTrader: (10)

About 550rwhp with unlocked converters a couple times with one and 80s.

jay_rich

iTrader: (8)

I am in the same boat. debating twin 255's again or a single 400 on pump 91. Shooting for 600whp max.

Jay

Forcefed86

iTrader: (4)

What was your base and boost pressure? Injector duty?


-thanks

01midmetws6

iTrader: (1)

I just did a 69 Camaro running E85, -8 feed and return, Seimen's 80# injector and a PT7675. It would drop fuel pressure when pushed above 10 psi (610-630whp). I would say it safely made 550-570 but was starting to drop. Base pressure did not matter as it would drop below 50-55 psi on anything over 10-11 psi. I would not run a single above 550-570whp unless you are keeping a really close eye on it.

This is very similar to other single 450's I have done.

Forcefed86

iTrader: (4)

Thanks for the input! I asked about base pressure because flow drops pretty drastically at higher pressures. If you were only running 45psi total pressure, the pump would flow alot more than if you tried to run 80psi total pressure. Much bigger deal if your running 25-35lbs of boost.

Ws6Dnero

iTrader: (23)

I was talking to a guy on boosted lsx facebook page yesterday and he is making 736 on e85 using a walbro 450. Im using one also. Havnt fully got my car running and tuned yet but I will be on pump gas & meth. I have the upgraded bulk head, racetronix hotwire, & 0 gauge wire up front. So it should get all the power it needs. Also im using an aeromotive boost referenced regulator with a return line

ryanleiker

iTrader: (2)

That's good news. Thanks.

01midmetws6

iTrader: (1)

Agreed, regardless of the base pressure used the pressure would drop below 40 psi when we pushed it to 13-14 psi. If you wanted to run huge injectors you could get away with a very low base to make up for it and may get 650-700 wheel

I can assure you that at 700+ whp he is dropping pressure as demand goes up.

Slow94Formula

iTrader: (18)

It looks like with a 43 psi base and 20 lbs of boost on top you will just barely make it to 700 with those injectors and that pump. That is assuming you have 13.5 v @ the pump since that is what walbro's flow numbers are based on.

Sales@Tick

iTrader: (3)

We really like the Walboro 262 and 267 pumps. I have dual 267's in my Ultra Street car from Squash Performance.

Squash has a really nice dual in tank set-up if you haven't seen it yet.

ryanleiker

iTrader: (2)

My setup is for my Nova, so no pre-made bolt-in assemblies will work.

What kind of increased capacities/capabilities/deficiencies come with running a boost-a-pump? I've deterred from them in the past, but if all I need it for is instantaneous volume, I may consider it.

GMCtrk

iTrader: (23)

542 rwhp at 8 psi through a truck drivetrain. Pump was done at around 11 psi, presumably around 600 rwhp. I now run 2 450s in tank in an otherwise stock fuel system and have exceeded the capacity of the stock lines and FPR.

93camaro_zzz

iTrader: (13)

I plan on doing the same thing. Twin 267's in tank.

TrikeMike

iTrader: (7)

What has anyone pushed these pumps to on gasoline? I have the Walbro 450lph E85 capable pump looking to do 700-750rwhp on TH400 80# Siemens Injectors Turbo.

93camaro_zzz

iTrader: (13)

It's those injectors that will get you TrikeMi8ke. Ask me how I know. lol

TrikeMike

iTrader: (7)

On gasoline? We have a car with the same injectors here making that with the Deka 80s and has room to grow. Doesn't show any signs of running out of injector.

spook99maro

iTrader: (2)

I'm the one that made 736. Don't have a log of pressure but I'm positive it was dropping as my Bosch 127lb inectors where at 90% dc. This also a m6 car. That day sucked since my laptop was dead and second pump wasn't kicking on.

redss82

Ive made just shy of 700 whp on 93 octane and meth(washer fluid) single 450 pump 8 feed 6 return 80lb injectors 50psi base pressure threw a th400 running out of turbo still a little fuel on the table

93camaro_zzz

iTrader: (13)

Oops, sorry. I read you wrong. When you said E85 compatible pump, I thought that meant you were going to run e85. Yeah you will have plenty of pump and injector if you are going to be on gas.