OEM vs Walbro 255 vs 455 flow rates.....hmmmm

07tundra · 05-05-2014, 11:24 AM

Just in case some folks have not seen this or have forgotten about it. Terry did some very good testing here. Which I believe is awesome knowledge to have especially with Vargas coming out with his HPFP upgrade

135Pats · 05-05-2014, 11:34 AM

455 flows very well, no doubt about that.

07tundra · 05-06-2014, 09:08 PM

It sure does and a good price I might add.......lol

ksalih · 05-08-2014, 11:15 AM

What exactly are we looking at here? Are values in "Test 1" and "Test 2" columns flow rates? Which row shows the data for the 455?

C.Pop · 05-08-2014, 11:41 AM

It's the 450 guys, not the 455.

ksalih · 05-08-2014, 05:01 PM

Quote:

Originally Posted by C.Pop

It's the 450 guys, not the 455.

You're mistaken, it's the 1000.

SteveAZ · 05-08-2014, 05:34 PM

Technically, it's a Walbro F90000267 and Walbro refers to it as their "450lph" pump.

If you search for it on ebay and plug in 455 you'll come up with bubkis....but if you search for a Walbro 450....you'll get all kinds of listings because that is how Walbro refer's to it.

Basically at some point somebody advertised it as a "455" because at 30psi under the right conditions it flows pretty close to that. You'll never get that in our cars.

In addition when all these upgrades started people were confusing the Walbro 450 and Walbro 255....

All pretty trivial really because unless you have other fuel system upgrades...both will max out your HPFP anyways.

07tundra · 05-09-2014, 02:22 AM

Absolutely some were confusing the 450 and the 255. Also confusing the fact that although the Walbro 255 does very well in e85 it is not "technically" an e85 pump and the 450 Walbro is.

SteveAZ · 05-09-2014, 04:35 AM

The factory pump isn't "technically" and E85 pump either....

07tundra · 05-09-2014, 12:40 PM

You are correct Sir so then alot of folks have a two non e85 compatible pumps in their tank, thanks for pointing that out. But being that the 450 or 455 is inline it compliments the oem pump when it struggles with e85. As does the 255 but in that later scenario you have 2 non e85 pumps complimenting each other. But hey whatever works!

07tundra · 05-09-2014, 04:40 PM

Quote:

Originally Posted by ksalih

What exactly are we looking at here? Are values in "Test 1" and "Test 2" columns flow rates? Which row shows the data for the 455?

Look at row 6 column LPH that specific setup outflows any current solution offered.

C.Pop · 05-09-2014, 04:52 PM

Quote:

Originally Posted by 07tundra

Look at row 6 column LPH that specific setup outflows any current solution offered.

Have you considered attaching multiple 450's in series? Of course with the factory bucket.

07tundra · 05-09-2014, 07:28 PM

Quote:

Originally Posted by C.Pop

Have you considered attaching multiple 450's in series? Of course with the factory bucket.

You'd have to wire it up in a different way. The way it's currently setup a stock 20 amp fuse is all that's needed

05-05-2014, 11:24 AM	#1
07tundra Lieutenant Colonel 119 Rep 1,525 Posts Drives: 8.1L Chevy 2500hd Join Date: Jan 2012 Location: New Mexico iTrader: (9)	OEM vs Walbro 255 vs 455 flow rates.....hmmmm Just in case some folks have not seen this or have forgotten about it. Terry did some very good testing here. Which I believe is awesome knowledge to have especially with Vargas coming out with his HPFP upgrade Attached Images Last edited by 07tundra; 05-05-2014 at 11:47 AM..
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05-05-2014, 11:34 AM	#2
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	455 flows very well, no doubt about that. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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05-06-2014, 09:08 PM	#3
07tundra Lieutenant Colonel 119 Rep 1,525 Posts Drives: 8.1L Chevy 2500hd Join Date: Jan 2012 Location: New Mexico iTrader: (9)	It sure does and a good price I might add.......lol
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05-08-2014, 11:15 AM	#4
ksalih Lieutenant 71 Rep 510 Posts Drives: 2018 M2 LCI Join Date: Mar 2012 Location: Gilbert, AZ iTrader: (1)	What exactly are we looking at here? Are values in "Test 1" and "Test 2" columns flow rates? Which row shows the data for the 455? __________________ '2018 F87 M2 LCI \| LBB \| GC Camber Plates \| Ohlins R&T 90/190N/mm \| 18x10 et33 square 275/35 \| MPe \| Poly Transmission Mounts \| Recaro Sportster CS
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05-08-2014, 11:41 AM	#5
C.Pop First Lieutenant 65 Rep 385 Posts Drives: 335i Join Date: May 2013 Location: AZ iTrader: (0)	It's the 450 guys, not the 455.
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05-08-2014, 05:34 PM	#7
SteveAZ Captain 60 Rep 654 Posts Drives: 135i Cab Join Date: Jul 2012 Location: Phoenix, AZ iTrader: (5)	Technically, it's a Walbro F90000267 and Walbro refers to it as their "450lph" pump. If you search for it on ebay and plug in 455 you'll come up with bubkis....but if you search for a Walbro 450....you'll get all kinds of listings because that is how Walbro refer's to it. Basically at some point somebody advertised it as a "455" because at 30psi under the right conditions it flows pretty close to that. You'll never get that in our cars. In addition when all these upgrades started people were confusing the Walbro 450 and Walbro 255.... All pretty trivial really because unless you have other fuel system upgrades...both will max out your HPFP anyways. __________________ 2008 E88--Fuel-It! Stage 4 LPFP & PI--PS2 turbos--JB4/MHD--FBO--662whp/604wtq 2011 E90--Fuel-It! S2BL LPFP and PI--PS2 Turbo--JB4/MHD--FBO--546whp/589wtq 2013 Mini JCW--Tune--DP--FMIC--a couple Fuel-It! goodies--265whp/320wtq 2013 F10--JB4/BM3 2015 F82--Fuel-It! Stage 3 LPFP & PI--PS2 Turbos-- JB4/BM3-FBO
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05-09-2014, 02:22 AM	#8
07tundra Lieutenant Colonel 119 Rep 1,525 Posts Drives: 8.1L Chevy 2500hd Join Date: Jan 2012 Location: New Mexico iTrader: (9)	Absolutely some were confusing the 450 and the 255. Also confusing the fact that although the Walbro 255 does very well in e85 it is not "technically" an e85 pump and the 450 Walbro is.
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05-09-2014, 04:35 AM	#9
SteveAZ Captain 60 Rep 654 Posts Drives: 135i Cab Join Date: Jul 2012 Location: Phoenix, AZ iTrader: (5)	The factory pump isn't "technically" and E85 pump either.... __________________ 2008 E88--Fuel-It! Stage 4 LPFP & PI--PS2 turbos--JB4/MHD--FBO--662whp/604wtq 2011 E90--Fuel-It! S2BL LPFP and PI--PS2 Turbo--JB4/MHD--FBO--546whp/589wtq 2013 Mini JCW--Tune--DP--FMIC--a couple Fuel-It! goodies--265whp/320wtq 2013 F10--JB4/BM3 2015 F82--Fuel-It! Stage 3 LPFP & PI--PS2 Turbos-- JB4/BM3-FBO
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05-09-2014, 12:40 PM	#10
07tundra Lieutenant Colonel 119 Rep 1,525 Posts Drives: 8.1L Chevy 2500hd Join Date: Jan 2012 Location: New Mexico iTrader: (9)	You are correct Sir so then alot of folks have a two non e85 compatible pumps in their tank, thanks for pointing that out. But being that the 450 or 455 is inline it compliments the oem pump when it struggles with e85. As does the 255 but in that later scenario you have 2 non e85 pumps complimenting each other. But hey whatever works!
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