2 X walbro in tank ?

JZA80RR

New Member
Jan 2, 2009
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norway
i am gonna upgrade the fuelsystem on my ma70 turbo,from 1 walbro 255L to 2 and get new fuel lines front to back:)
have enybody done 2 pumps on the oem fuelpumphanger ?
if you got photos of that and routing of new fuel lines inn/out of the tank with AN fittings pls post them
 

Dylan JZ

一番 King
Oct 18, 2007
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湾岸せん
why not use a single Walbro 400lph jet pump? unless you need the extra 100lph for some reason..

even then, I'd use the 400 and a bosch 044 in-line or something.
 

Dylan JZ

一番 King
Oct 18, 2007
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Easily both ways.. But the 400 is a safer bet for 500-600.

After that, twin a340s, twin 400s, or either one in combination with a Bosch 044 inline would be the ideal setup IMO.
 

Dylan JZ

一番 King
Oct 18, 2007
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jdmfreak;1856266 said:
What hp is a single walbro 255 good 4?

It's more about how much fuel it's putting out than a specific HP, but I'd say around 450whp is a fairly safe estimate, though folks do/have done 500 on them lol.
 

Dylan JZ

一番 King
Oct 18, 2007
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Something to keep in mind is what fuel pressure is at, what rail and lines are being used, and ultimately which injectors. That all might seem like common sense, but each one is an important variable that modifies what is needed.
 

jdmfreak

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Oct 8, 2010
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Lol good thing i stumbled on this thread lol i was under the impression that a 255 was good for 750 injectors... and 750 injectors were good for about 650 rwhp with no j tube and a afpr ... guess i should look further into some of this stuff before just beliving what i hear lol
 

GrimJack

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Dec 31, 1969
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No. The only pumps you can put in two of that I know of are the Wally 255 or the Aeromotive 340. Even these are a DAMN tight fit.

The Wally 400, Denso Mk4, and Bosch 044 are too large for two of them to fit through the hole in the tank.