Bosch 044 or the Walbro 255 ?

Post Reply
User avatar
panel
Posts: 3968
Joined: Sun Sep 24, 2000 2:01 am

Bosch 044 or the Walbro 255 ?

Post by panel » Fri Jun 21, 2019 11:54 am

If the these two fuel pumps were the same price what would be the better pump to buy?

Bosch Specs: Part Number: 0580 254 044 Minimum Current: 12 Volts / 13 Amp Operating Pressure: 72.5 PSI (5 Bar) Minimum Flow @ Outlet: 80 GPH (300 LPH) High Pressure Fuel Pump Location: In-Line High Temperature Reduction: 8 GPH (30 LPH) Dimensions: 196mm Length x 60mm Diameter Weight: 1030 Grams (2.27 Pounds) Fuel Pump

Walbro Specs: Fuel Pump: GSS341

The Walbro high output in-tank electric fuel pumps are available in flow ratings of 255 liters of fuel per hour. These particular pumps flow significantly more fuel at higher pressure. For example, at 80 PSI the standard 255 lph pump will flow around 132 liters (35 gallons) per hour. At that same 80 PSI the equivalent HP (high pressure) fuel pump will flow over 210 liters (50 gallons) per hour.
'65 Bus with a JDM Subaru EJ20 Turbo
Built by Germans powered by Japanese and brought together by Canadians

User avatar
Chip Birks
Posts: 3695
Joined: Wed Mar 12, 2008 7:59 pm

Re: Bosch 044 or the Walbro 255 ?

Post by Chip Birks » Fri Jun 21, 2019 5:15 pm

Are you planning to do an in tank setup?

User avatar
panel
Posts: 3968
Joined: Sun Sep 24, 2000 2:01 am

Re: Bosch 044 or the Walbro 255 ?

Post by panel » Sat Jun 22, 2019 12:46 am

No. I have an external CIS pump right now but might swap in the Fall/Winter. Prolly easiest to do a swap from Bosch to Bosch but thought I'd ask.
'65 Bus with a JDM Subaru EJ20 Turbo
Built by Germans powered by Japanese and brought together by Canadians

bug66
Posts: 383
Joined: Tue Apr 01, 2014 3:26 am

Re: Bosch 044 or the Walbro 255 ?

Post by bug66 » Thu Jun 27, 2019 3:17 pm

I don't trust the manufactorers claim on fuel delivery specs..

Do a detailed search, and get the one with the highest hp potensial.
---

2165cc T3/T4 turbo, DTA S60 on E85.

Boost was created only to make people smile, and make power! 8)

10.626 @ 132mph SCC2016
10.407 @ 134mph SCC2017
10.221 @ 135mph SCC2018

User avatar
MarioVelotta
Posts: 4052
Joined: Wed Mar 12, 2003 3:01 am

Re: Bosch 044 or the Walbro 255 ?

Post by MarioVelotta » Tue Oct 01, 2019 11:12 pm

Do you plan to up the boost? Either pump is going to be perfectly acceptable under 300hp. The Bosch 044 pumps just need special attention to the fuel input as they have don't produce suction.
The Dub Shop
[email protected]
1600 ITB NA - 18sec
1600 Supercharged - 13psi - 15.40 @ 84.66mph
2276 Turbo - 15psi - 11.537 @ 115.74mph
1600 Turbo (Coming Soon :twisted: )
Facebook-Tech-Store

andy198712
Posts: 2430
Joined: Wed Apr 13, 2011 3:01 pm

Re: Bosch 044 or the Walbro 255 ?

Post by andy198712 » Thu Oct 03, 2019 1:51 pm

my OEM 044 has a cast 13mm inlet to give you an idea of size they should have

User avatar
panel
Posts: 3968
Joined: Sun Sep 24, 2000 2:01 am

Re: Bosch 044 or the Walbro 255 ?

Post by panel » Wed Oct 14, 2020 5:44 pm

Anyone else running a Bosch pump but with a different p/n etc and having good results ? Under 300HP is my goal :wink:
'65 Bus with a JDM Subaru EJ20 Turbo
Built by Germans powered by Japanese and brought together by Canadians

User avatar
panel
Posts: 3968
Joined: Sun Sep 24, 2000 2:01 am

Re: Bosch 044 or the Walbro 255 ?

Post by panel » Wed Oct 14, 2020 5:46 pm

andy198712 wrote:
Thu Oct 03, 2019 1:51 pm
my OEM 044 has a cast 13mm inlet to give you an idea of size they should have
Thx , I'd hate to buy a fake one that's for sure :|
'65 Bus with a JDM Subaru EJ20 Turbo
Built by Germans powered by Japanese and brought together by Canadians

Clonebug
Posts: 4260
Joined: Fri Feb 16, 2007 12:28 am

Re: Bosch 044 or the Walbro 255 ?

Post by Clonebug » Thu Oct 15, 2020 8:19 am

I have a Bosch pump from a 1994 Volvo 940 turbo. I've been running it since I started FI in 2013.
It has a 13mm inlet and a 1/4 inch mm equivalent outlet.
I run a 1/2 inch hose feeding it and a banjo to banjo into a Golf FI filter....then a banjo to 5/16ths to my pressure line to the back.
Stripped66 wrote:The point wasn't to argue air temps with the current world record holder, but to dispel the claim that the K03 is wrapped up at 150 HP. It's not.

User avatar
panel
Posts: 3968
Joined: Sun Sep 24, 2000 2:01 am

Re: Bosch 044 or the Walbro 255 ?

Post by panel » Thu Oct 15, 2020 10:07 am

I run the same filter as you. What's the p/n of the pump you're running ?
'65 Bus with a JDM Subaru EJ20 Turbo
Built by Germans powered by Japanese and brought together by Canadians

Clonebug
Posts: 4260
Joined: Fri Feb 16, 2007 12:28 am

Re: Bosch 044 or the Walbro 255 ?

Post by Clonebug » Thu Oct 15, 2020 10:41 pm

panel wrote:
Thu Oct 15, 2020 10:07 am
I run the same filter as you. What's the p/n of the pump you're running ?
Image

I can't read the Part number on the pump.....But you can get lots of hits on a replacement pump on Bing.
The only thing about that pump is it takes a special connector for power and ground. It might be Volvo specific. I happened to cut the connectors off the Volvo when I grabbed the pump.
Stripped66 wrote:The point wasn't to argue air temps with the current world record holder, but to dispel the claim that the K03 is wrapped up at 150 HP. It's not.

Post Reply