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Old 03-10-2009, 07:18 AM   #1
verc
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Default Anyone here run dual walbros and huge injectors with all else stock?

Just wondering.... Burschur makes a good dual walbro setup so this would be something like:

- dual walbro
- 1000cc injectors
- stock lines
- stock fpr
- stock rails


Anybody here run that here? I'm not the kind of person that does mods for the sake of mods, I'm just curious if anybody's got a big power DD setup with a simple fuel system, as opposed to a crazy aeromotive and surgetank w/ aftermarket fuel lines, FPR and rails kind of deal.

Thanks
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Old 03-10-2009, 07:26 AM   #2
n2oiroc
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i was under the impression that the stock fpr cant handle 2 pumps or even 1 fairly big one.
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Old 03-10-2009, 02:31 PM   #3
leonbmx
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I thought Buschur wasn't making them for Subaru's anymore? They aren't on the website anymore...
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Old 03-10-2009, 02:47 PM   #4
Fongers
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beyond a single walbro, you'll want to upgrade the rest of the system to parallel fueling at the least.
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Old 03-10-2009, 04:03 PM   #5
blowbyu24
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Quote:
Originally Posted by verc View Post
Just wondering.... Burschur makes a good dual walbro setup so this would be something like:

- dual walbro
- 1000cc injectors
- stock lines
- stock fpr
- stock rails


Anybody here run that here? I'm not the kind of person that does mods for the sake of mods, I'm just curious if anybody's got a big power DD setup with a simple fuel system, as opposed to a crazy aeromotive and surgetank w/ aftermarket fuel lines, FPR and rails kind of deal.

Thanks
i used to have dual walbros, 1000cc injectors and a aeromotive fpr and everything else stock

now i have bosch 044, instead of the dual walbros....the one failed and i didn't know until i was going down the track @ 30psi running 15.1 a/f

the 044 seems to work great with the stock fuel system, i have the base fuel pressure at 52psi and have the 044 hard wired to the battery/relay....i do have a hydra ems to control the tune so i can bypass the oem fuel pump controller
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Old 03-10-2009, 05:19 PM   #6
Token-Negro
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At the least you prob want to do an FPR, not very expensive, and will become a great tool if you have to raise the BFP.
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Old 03-10-2009, 10:39 PM   #7
verc
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Quote:
Originally Posted by blowbyu24 View Post
i used to have dual walbros, 1000cc injectors and a aeromotive fpr and everything else stock

now i have bosch 044, instead of the dual walbros....the one failed and i didn't know until i was going down the track @ 30psi running 15.1 a/f

the 044 seems to work great with the stock fuel system, i have the base fuel pressure at 52psi and have the 044 hard wired to the battery/relay....i do have a hydra ems to control the tune so i can bypass the oem fuel pump controller

So you ditched the walbros b/c one of them failed? Why would the bosch be better?


To another poster: yes I just called burschur and they still do the dual setup as one-off core exchanges for $450.
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Old 03-10-2009, 10:59 PM   #8
dexterous
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Because if the bosch failed the car would stop running.
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Old 03-10-2009, 11:49 PM   #9
blowbyu24
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Quote:
Originally Posted by verc View Post
So you ditched the walbros b/c one of them failed? Why would the bosch be better?


To another poster: yes I just called burschur and they still do the dual setup as one-off core exchanges for $450.
the bosch can handle the flow and like the poster above said the car will not run if it stops rather than lean conditions like the dual walbros
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Old 03-11-2009, 12:05 AM   #10
jigga
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Quote:
Originally Posted by dexterous View Post
Because if the bosch failed the car would stop running.
I don't know why this keeps going around like some old anecdote, but fuel pumps don't always completely pack up completely at the first sign of trouble.... They actually do work often when on the way out... Just not at 100%.

Read this..

http://www.associatedcontent.com/art...p_on_your.html


Again, any pump can fail, whether you have a single walbro, 2 walbros, or 1 bosch pump, or 10 bosch pumps running the show.

Key is to notice the early signs...

A car coming to a stop on the side of the road or failing to run is not necessarily an early sign of an issue with the pump.
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Old 03-12-2009, 12:59 PM   #11
dexterous
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Jigga,

Agreed, but in my experience, its more obvious that something is wrong.
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Old 03-12-2009, 03:58 PM   #12
blackacres
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I actually had a Buschur dual Walbro setup in my parts bin for my new build.

However, my tuner feels the same as blowbyu24 and dexterous on the dual setup.

If one of the dual pumps fails, at high boost/fuel demand levels, you may encounter a leaned out condition, as the remaining single pump can't supply enough fuel. A motor could suffer considerable damage in a very short time if this occured and was not caught right away.

Also, one pump working may not be noticed at lower boost levels, as there may not be any signs that only one pump is working.

As posted above, if the single Bosch begins to fail, you possibly would notice it more easily, if it fails, the engine will not run.

My tuner talked me out of the dual setup and the plans are now to use a Bosch 044 pump, with a new larger fuel supply line, using the original supply line as a return.

IMO, I've got too much invested in my new motor to take a risk that I can avoid. Besides the Buschur setup costs more than the Bosch!
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Old 03-12-2009, 10:40 PM   #13
blowbyu24
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^^^^good choice man

probably the only reason my motor didn't pop was b/c i was running c16 at the time and that fuel is really hard to make det
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Old 03-13-2009, 02:05 AM   #14
ScorpionT
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Default

It really seems like there isnt much for a drop in fuel solution, Im surprised nobody has made one yet. I might hafta look into building something. With the debate on single vs dual pump, I understand the concern, but Ive personally never had a problem running 2 and even 3 pumps on Supras.
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Old 03-13-2009, 04:53 PM   #15
Dutch Scooby lover
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If you go dual pump,at least go parallel as well.
It wont cost the bank.
I made this setup for under a 100$ (I have the welder myself, add 2 6 packs for the welder if U don't)

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Old 03-13-2009, 08:39 PM   #16
SloRice
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Buschur has built 100's of dual pump setups for the Evo without issue, including mine. Many of the Supra guys are running dual and triple pumps without issues. My STI also had a BR dual Walbro setup in it without issue....actually I had the first one David ever built.

Also, BR's dual pump setup won't overrun the fuel pressure regulator because the second pump is on a hobbs switch that turns it on when it sees positive pressure.
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Old 03-14-2009, 01:30 AM   #17
TDagen
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fullblown has a subaru double pumper also...
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Old 04-05-2009, 11:52 AM   #18
Zspectrum
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Who makes a dual walbro for the 08 stis?
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Old 04-06-2009, 10:25 AM   #19
Huff
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Quote:
Originally Posted by SloRice View Post
Buschur has built 100's of dual pump setups for the Evo without issue, including mine. Many of the Supra guys are running dual and triple pumps without issues. My STI also had a BR dual Walbro setup in it without issue....actually I had the first one David ever built.

Also, BR's dual pump setup won't overrun the fuel pressure regulator because the second pump is on a hobbs switch that turns it on when it sees positive pressure.
Mine is setup the same way with one always on and the other kicking on at 13psi of boost. Custom dual walbro done by Verocious Motorsports. Still with stock FPR.
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