Fuel pump for 500-600+RWHP

brock1949

brock1949

Its alive!!!
On my rebuild of my new build i've got a turbo coming thats going to support some higher numbers that originally thought. In that range what am i looking for .. walbro 255? can it cut it? I was just told by the vender i'm getting the turbo from that i can run a walbro 255 with a MSD voltage box deal.. What are my options that won't be 600+ dollars?

I was thinking A1000 but heard it god loud and not that reliable for a dailey drivable truck, granted this truck will not be DD but sometimes for days or week(s) on end it might be during nice weather.

Probably running 65lb injectors unless i should goto the 79lb or whatever the next high impd is.

thanks!
 
brock1949

brock1949

Its alive!!!
Re: Fuel pump for 500-600+RWHP

see i've got a walbro 190 right now, so i'm stuck buying 120 dollar 255 and 300+ dollar pump booster.. for that much there has to be a better option i'd think. i wish i would have bought the 255 when i got the 190 but at the time i was running 4lbs of boost on a TBI engine lmao...
 
cloneman315

cloneman315

Active member
Re: Fuel pump for 500-600+RWHP

hmm not sure i just went that route so i didnt have to upgrade fuel lines etc,sending unit
 
Timbo

Timbo

SyTy Stalker
Re: Fuel pump for 500-600+RWHP

I haven't had any problems with my A1000. It is a bit louder than a regular fuel pump, but that doesn't bother me at all.
 
brock1949

brock1949

Its alive!!!
Re: Fuel pump for 500-600+RWHP

so you'd say it isn't like a loud annoying thing lol? .. i've just heard a couple people now tell me external pumps in general are loud. You feel its a reliable solid peice?
 
roadkill748

roadkill748

Boost Junkie
Re: Fuel pump for 500-600+RWHP

the only way to get an a1000 to last on anything thats daily driven is use a boost a pump as it turns down the pump when u are just driveling around town no race pump is rated for daily driver use
 
brock1949

brock1949

Its alive!!!
Re: Fuel pump for 500-600+RWHP

So the A1000 can't handle DD, i keep getting mixed reviews on that because some people say it can others say it can't.

The clip strait off the site acts like its able to do what i want but again thats marketing;
"This is the pump that started it all. Durable, reliable, good looking and it supports high horsepower. Prefect for the daily driver that doesn't run like a daily driver."

Also i use the term DD very loosley because it sits 4 months a year, gets trailered anywhere not local and i've got 3 other vehicles i drive probably more often.. so its probably only looking at 5000-10000 miles a year TOPS. If that changes anything. whats the most anyone has ran with a Walbro 255? what about summit brand and other brand pumps.
 
Foot Performance

Foot Performance

Donating Member
Re: Fuel pump for 500-600+RWHP

I was reading about the pump booster do you guys think they could over work the pump they say they can output 22 v. I would kinda think that is a bit excessive for the pump and wiring. Any other thoughts?
 
DynaGlide

DynaGlide

Ton-Eighty
Re: Fuel pump for 500-600+RWHP

I think I've done this calculation before...

The 255 is good up to about 550, if I remember correctly. After that, you're getting out of the comfort range of the pump.

If I were you, I'd buy American! :tup:
 
cloneman315

cloneman315

Active member
Re: Fuel pump for 500-600+RWHP

u can turn the output voltage down on the boost a pump ,i have had one for a few years it works perfect mine is about 17 volts at full boost,remember it only ups the voltage under boost.My opinion i hate the sound of a loud ass race pump on a daily car or something i am going to drive alot,do the 255 and boos a pump and be done,which the 255 should be ok for 500 hp i just did the boost a pump to be safe.
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: Fuel pump for 500-600+RWHP

Nolan mention they made 740hp with a MSD boost a pump and one walbro. You could also use double pump intake set ups.

http://www.syty.net/forums/showthread.php?t=49096&highlight=

I think as you go over 500rwhp, I would think beyond a typical walbro. One thing to remmeber (areomotive mentions this as well) the high the fuel pressure, the less output the pump will be able to supply.

One other mention is about fuel injector sizing, is most formula fail to mention about the flow effects higher fuel presssure with rising rate fuel pressure. Ie 25psi of boost with a base FP of 45 psi yeilds 70psi of FP at full boost. A 65# injector running at 70psi of fuel pressure is ~ able to flow 82 lb/hr. The formula is the original injector rating x square root of Fuel pressure / injector rated FP (usually 43.5) so I did 65lb/hr x (70/43.5)^.5

IMO 65# Injector and High Pressure 255 Walbro are good at 500rwhp above that your pushing close to that edge. For peace of mind above that you might want to think about doing some more with the fuel pumps and using larger injectors given the money tied up into the motor and the turbo.
 
cloneman315

cloneman315

Active member
Re: Fuel pump for 500-600+RWHP

what i do and this is just me,i notice lots of people have these dumb problems with these trucks,they try to make things work etc that have never been done or tested etc,which is fine new ideas are always good,but for me i do the things that other guys have done that is proven that works and is tested,but thats just me ,but then again i dont have nearly any of the problems that some do.ps i have used the combo on 50s and my current 75s
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: Fuel pump for 500-600+RWHP

cloneman315 said:
what i do and this is just me,i notice lots of people have these dumb problems with these trucks,they try to make things work etc that have never been done or tested etc,which is fine new ideas are always good,but for me i do the things that other guys have done that is proven that works and is tested,but thats just me ,but then again i dont have nearly any of the problems that some do.ps i have used the combo on 50s and my current 75s
Click to expand...

I agree, no sense in reinventing the wheel for a project that isn't breaking new ground.
 
brock1949

brock1949

Its alive!!!
Re: Fuel pump for 500-600+RWHP

Well on the injector side i'm kinda screwed i'm running custom software on a LSX 4111 pcm.. high impd only and i don't want to run a conversion unit to handle low impd. I'm trying to build something deadly reliable hence the factory computer, and i'm even payin someone to build the harness.. speartech (retired GM engineer) or current performance.

Isnt the next size like 79lb injectors? I doubt they will idle worth crap but it is going to be a sequential injection setup.. might help

The goal at this time is probably 550RWHP,Based on what i've seen, the engine builders, and general opinion of syty vendors ..Mike, Eric, there telling me thats where the safe point on pump gas ends. I feel that I have more than enough turbo for those numbers, I believe more than enough flow in the throttle body, plenum and intake..

And i completely agree i'm not trying to re-invent the wheel or set any records.. or even be completely different. I don't want anyone to think I'm shunning proven technology either because I'm definitely wanting to embrace anything proven period lol I'm just after a certain build that will do what i want and hopefully for at least several years and transmissions down the road.

I'm not on a ungodly tight budget but I am saving for a house right now and whatever I spend completely comes out of that fund so I'm trying to keep it to a retarded minimal.

Thanks!
 
Timbo

Timbo

SyTy Stalker
Re: Fuel pump for 500-600+RWHP

I think I put about 5k miles on my Ty last year. Sometimes driving daily, though typically only in nice weather. Like I said, I never had a problem with my A1000. The sound doesn't annoy me, in fact, I don't even notice it anymore, and my truck doesn't have a stereo.
 
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