Walbro 255 or Bosch 044 fuel pump?

[f15046]

I just put together a gt2871r kit and installed it on my car. I ordered Unitronics BT tuning w/ 550cc injectors. I am debating on which fuel pump would be best for my setup. 034 motorsports recommends the Bosch 044 fuel pump over the Walbro 255. But it seems that all kinds of cars use the Walbro fuel pump, and it's ALOT cheaper than the Bosch. $150 vs $450. If you have any experience with either of these fuel pumps let me know. Thanks

[Don Supreme]

I have a 044... I should never have to worry about a fuel pump again... Makes a cool hiss too.

However, a reliable walbro is much cheaper and will probably work just fine for a 2871... the stock pump will probably work just fine for a 2871 .

[Das General]

I've run the walbro on my 630cc injectors. Some people say the Walbro is prone to failure, but I haven't had any issues.

The walbro is fairly loud as well. Makes a whining noise.

[pac1085]

Can't hear my Walbro unless the back seat is down.

[bassed]

I have the 044 installed and a Walbro 255 pump lying around if you want one cheap, you would just need the basket kit for it. The issue with either is getting the new pump and new basket to lock back in with the 044 or the old basket and new pump to lock back in with the Walbro. The OEM tool makes it much easier and you don't have to worry about breaking the fragile locking tab for the cradle to basket connection.

[f15046]

the stock fuel pump is only good for 15psi on the gt2871r, according to 034 Motorsports.

[Burntaudi]

I've heard the quality control with the Walbro isn't that great. Apparently no Walbro's flow the same.

[sean1.8t]

the stock fuel pump is only good for 15psi on the gt2871r, according to 034 Motorsports.

bullshit

[k0mpresd]

walbro here.

[bassed]

bullshit

2nd the only worry with stock FP's is high milage past 100k, they are more than capable of flowing enough for a GT28 or even larger.

[Das General]

Can't hear my Walbro unless the back seat is down.

very true. but sometimes with the seat up i can hear it a little bit.

[djwimbo]

We ran a 255 on my roomate's Vette. 400hp/tq no issues, constant 40-42 psi throughout the powerband.

If you're that worried about it, get a fuel pressure gauge and monitor it. If the pump falls on it's face and can't keep up w/ demand, upgrade. Obviously monitor AFR as well.
People run the 28RS on the stock pump, boosing 20psi with the FPR still vac/boost assisted.

EDIT: as far as the consistency of the output, they have quality control for that. I know a ton of people that run the 255 in almost any street car, without any issues. Look at it this way, depending on the setup you can almost run two 255's for the price of one 044.

[f15046]

Yeh i know they use the 255 in tons of cars. so i think that is probably what i will go with.

[Wizard-of-OD]

the stock fuel pump is only good for 15psi on the gt2871r, according to 034 Motorsports.

Eh?
Who told you this?

[creechsa4]

walbro here. great pump for the price.

[prodrive]

Bosch 040 fuel pump here, flows as much as 044 but much cheaper,intank pump.

[STASIK A4]

Have walbro inside the tank and 044 outside the tank.....

[AudiRacerS4]

the stock fuel pump is only good for 15psi on the gt2871r, according to 034 Motorsports.

i'm sorry but whoever told you that is very wrong

[Don Supreme]

Shady sales strategy....

[f15046]

I called 034 Motorsports and thats what the guy on the phone told me. he said they didnt recommend the Walbro at all, and that stock pump was good for 15psi. My car has 112k on it, so i think I'm going with the Walbro.

[Euro-Tuner]

so a stock fuel pump with 175k miles on it wont be sufficiant for a 2.0L w/ a 30r and 630's?

[sean1.8t]

^just depends on what you plan on pushing with that setup..

low boost(15-18psi) all the time on pump. sure, should be fine.

but 25-32psi on race gas, no way. i'd definately upgrade the pump

[djwimbo]

^ what he said.

Stock pumps are pretty decent. Past 18psi on any turbo you're running a LOT of fuel pressure. Our FPR are vac and boost assisted, 1:1 ratio. Add 1 psi boost, 1 psi fuel pressure follows.
On my car (uni stg1+) under full boost I'm hitting a smidge over 70psi fuel pressure. From a durabilty stand point. That's hard on pumps. It'd be easier on the pump to flow more volume at less pressure.

[f15046]

I am going to be running the Unitronics BT tuning on my gt2871r. I am going to run the Walbro pump. So do i still run the factory FPR? Is there anything else in the fuel system that would change from stock other than the fuel pump?

[creechsa4]

yup you can run the stock rail & fpr. nope just get some clamps for the intank hoses. use the one time squeeze one's, just use some cutter pliers to cinch them down. make sure you get the complete walbro kit with sponge outer to put around the pump to keep it tight in the basket. splice power & ground at the tank & your golden.

[djwimbo]

& your golden.

like showers?

Anyways, your FPR depends on the tune. If the tune calls for a 3Bar on 440's, 550's, or 630's then go with what they recommend. There's a set of parameters that the tune is based off of. I wouldn't shy too far from those, unless I had a wideband and datalogging capabilities. NTM the time to mess with it.

Honestly, I'd roll on an adjustable FPR, that way you can make minor tweaks rather than swapping a 3Bar for a 4Bar.

[creechsa4]

oh yeah wasn't specific, but yeah i meant an adjustable fpr-stock style would be great. i thought everyone that goes BT would naturally run a adjustable fpr. ever since i was k03 i've always run an adjustable fpr. going w/o an adj fpr wouldn't allow any adjustment... i've run k03, k04, gt28r, gt2871 all on adjustable fpr.

[f15046]

ok so I bought a walbro. Now what do I need to install this in my tank? I called USRT and they said they can't get the kit I would need. So does anyone know what i need or what i parts i will need?

[creechsa4]

cool you got the walbro. here's a place they sell the parts that you will need. take extreme care cause you'll have an open tank once you pull your stock pump out. there are like 4 or so tabs holding the basket in the cage. unplug ur battery, no halogen worklight around your trunk.
http://www.autoperformanceengineerin...html/kits.html

[killa]

I just put together a gt2871r kit and installed it on my car. I ordered Unitronics BT tuning w/ 550cc injectors. I am debating on which fuel pump would be best for my setup. 034 motorsports recommends the Bosch 044 fuel pump over the Walbro 255. But it seems that all kinds of cars use the Walbro fuel pump, and it's ALOT cheaper than the Bosch. $150 vs $450. If you have any experience with either of these fuel pumps let me know. Thanks

I run both pumps in different cars, all you need is really a walbro.

the 044 is needed if you go to higher fuel pressures.

Any Walbro 255 HP (high pressure) will work fine with a 3 bar fpr.

Don't let ANYONE tell you otherwise, they just want to sell.

[xr4tic]

Walbro install - http://forums.audiworld.com/performa...gs/44541.phtml

I did that 6 years ago, when no kit existed, so there are probably better ways to mount it than I did.

The Walbro is just fine, if you keep the fuel pressures reasonable, a 3bar FPR is best, but a 4bar will work if you keep the boost at a reasonable level.

If you look at the specs on the APE page - http://www.autoperformanceengineerin...l/fpspecs.html

550cc injectors x 4 x 60 = 132 liters/min fuel needed 132/3.8 = 34 gph

Keep the pump below 90psi (@12V), you should be fine, that's a 4 bar FPR + 30psi of boost

[f15046]

I got the 255 walbro installed, everything seems to work fine. Thanks to everyone that helped.