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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Dual Walbro 450's: Ultimate Dual Setup?



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      06-08-2017, 05:35 PM   #1
TEC
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Dual Walbro 450's: Ultimate Dual Setup?

Share time!

So my goal was to install two Walbro 450 pumps so that I could run e85 and push boost above 17 psi on the stock turbos and in the future possibly run a PI setup. I looked at a few companies offerings but I decided that I could build something that rivaled and even bettered what is currently on the market for a cheaper cost. This is not a knock on any company or their pricing for dual intank pumps but rather my Colt/DSM mentality to do it yourself and learn more about your car in the process.

I’m not sure how this forum feels about posting pricing so I will intentionally leave this information out. You can PM me if you want to know where I picked up my parts.

For this build I bought:
Used stock fuel bucket – junk yard
2 Walbro 450 Pumps with electrical connectors (no fuel socks needed)
2 Holley Hydramats (model 16-111) - 15”x3” for Walbro pumps

I contacted 07Tundra (Jose) for his help with this project…none of this would not have been possible without his help.

He took the used bucket and with some modifications came up with this:





What you see are two Walbro fuel pumps in a modified stock fuel bucket with an adapter to hold the pumps in place. Here is a look at the adapter as it was being laid out for use:



The two pumps feed into PTE tubing and a PTE Y adapter. When I decide to go PI I will probably go back and feed only one pump into the stock fuel line and use the other pump to feed the PI. I cut a hole in the top of the fuel pump bucket top and fed through the wiring for the secondary pump.



The main pump uses the stock wiring and is controlled by the DME as is the stock pump. The second pump is controlled by a Hobbs Switch mounted in the trunk.



I am using the “prototype” adapter. I’ve been told that a newer version exists that looks more like this:



My total cost for this project is less than what I would have paid another company for their version of the same thing, with the added bonus of being able to utilize the newest technology being the hydramats which no company currently offers.

I’ve been driving the car with this setup installed and so far it has worked perfectly…no added pump noise and no LPFP fall off from E85 use.

Last edited by TEC; 06-08-2017 at 05:43 PM.
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      06-08-2017, 05:36 PM   #2
TEC
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For details on how this was installed in my car:
http://www.e90post.com/forums/showthread.php?t=1392494

Last edited by TEC; 06-08-2017 at 06:30 PM.
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      06-08-2017, 05:48 PM   #3
fordbaxter
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Quote:
Originally Posted by TEC View Post
My total cost for this project is less than what I would have paid another company for their version of the same thing, with the added bonus of being able to utilize the newest technology being the hydramats which no company currently offers.
How does this filter setup differ from what Fuel-It! ships with their bucketless LPFPs?
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      06-08-2017, 06:36 PM   #4
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Quote:
Originally Posted by fordbaxter View Post
How does this filter setup differ from what Fuel-It! ships with their bucketless LPFPs?
Both made by Holley but theirs is a "t".
The biggest difference though is that they do not offer dual pumps with the hydramats.
The only offering I see of theirs that utilizes the hydramats (upgrade charge) is for their single bucketless option.
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      06-09-2017, 01:36 AM   #5
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Quote:
Originally Posted by TEC View Post
Quote:
Originally Posted by fordbaxter View Post
How does this filter setup differ from what Fuel-It! ships with their bucketless LPFPs?
Both made by Holley but theirs is a "t".
The biggest difference though is that they do not offer dual pumps with the hydramats.
The only offering I see of theirs that utilizes the hydramats (upgrade charge) is for their single bucketless option.
Fuel it has a stage 3 and 4 bucketless- using custom mats
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      06-09-2017, 05:11 AM   #6
JuniorB
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It looks like a clean install,,are you running a larger fuel line to the hpfp? It would seem with that much volume, a stock fuel line would be the bottleneck in a system like this. Do you have to run a return line as well? Looks good tho.
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      06-09-2017, 09:20 AM   #7
TEC
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Quote:
Originally Posted by 1hunglow View Post
Fuel it has a stage 3 and 4 bucketless- using custom mats
I dont do the "stage" thing so I am going to assume you mean that they have a dual or triple pump setup that has custom mats.
If they do have three Walbros running Hydramats (I cant find any bucketless option outside of the single Walbro 450) I would definitely like to see that. Fitting two mats into the tank was not easy.
The Fuel-it option is a good route for some people but for me I wanted something that cost less than their single bucketless option with Hydramats and worked as well if not better than their dual Walbro setup.

Last edited by TEC; 06-09-2017 at 09:34 AM.
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      06-09-2017, 09:26 AM   #8
TEC
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Quote:
Originally Posted by JuniorB View Post
It looks like a clean install,,are you running a larger fuel line to the hpfp? It would seem with that much volume, a stock fuel line would be the bottleneck in a system like this. Do you have to run a return line as well? Looks good tho.
Good questions and you are correct.
For now its set up to allow me to take advantage of straight e85 or even race gas knowing that I will never get a LPFP dip.
In order for me to take full advantage of the system I am going to need to upgrade the fuel lines and go port injection. When I make that jump I will probably keep one pump tied to the stock line and use the other pump to feed the PI setup.
I will update this and the DIY once I install hybrid turbos and PI.
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      06-10-2017, 01:19 PM   #9
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      06-11-2017, 11:32 AM   #10
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+1 it does look nice and clean.
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