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Old 11-03-2014, 12:32 PM   #1
ALOKIN
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Member#: 348177
Join Date: Feb 2013
Chapter/Region: TXIC
Location: TX
Vehicle:
2013 WRX STI Limited
476whp on teh moonshine

Default Fuel Pump driver/booster

I recently installed a Wally 460 into my GR and wanted to drive the pump with the factory PWM settings but didn't want to fry my oem FPC as the wally pulls more current than the stock pump.

I designed a driver module that can source the higher instantaneous currents as well as have adequate room to over drive the much larger pump. It also had to be a plug and play type thing that I could just insert it between the factory fpc and the harness leading to the pump in the stock bucket. I custom designed an aluminum enclosure to provide adequate thermal dispersion. The driver PCB is installed and the whole mess gets vacuum potted.

I also designed a "boostapump" type voltage overdrive module that will kick on based on the incoming pwm duty cycles. It goes between the oem FPC and my driver module, all plug an play and can boost the pump voltage up to as high as 18VDC. Its capable of 500W so it packs quite a punch.


Here are a couple of the cncd enclosures, Ill post some more picks of the PCB and harness and the whole thing installed when I get home tonight.


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Old 11-04-2014, 08:44 AM   #2
biknman
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2003 GG HC TT
08 STI 06 OBXT 96 GF

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Sub'd very interesting! Something that is very well needed in the Suby community.
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Old 11-05-2014, 07:10 AM   #3
Layvon
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STi 04/05/06/07
JBP / OBP for now

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Pretty neat man, I'll be watching this thread.
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Old 11-06-2014, 10:15 PM   #4
Token-Negro
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Aspen White / Silver

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Pretty cool I do believe dccd pro was working on a similar device. Would this be able to handle something around 20 amps?
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Old 11-06-2014, 10:21 PM   #5
ALOKIN
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2013 WRX STI Limited
476whp on teh moonshine

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Quote:
Originally Posted by Token-Negro View Post
Pretty cool I do believe dccd pro was working on a similar device. Would this be able to handle something around 20 amps?
500W, so ~40A @12VDC. I design and make stuff like this for a living so its no sweat Working on one right now for a friend. The driver design is done and I've had one chugging away in my car for almost a month now. I wouldn't mind having a few more folks test these for me as I may start selling them. The booster/overdrive is still a work in progress.
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Old 11-06-2014, 10:27 PM   #6
beef
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2002 WRX

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Im finishing up a build, and im in need of one of these. I was about to buy dccd pro's fuel controller, but I would definitely be willing to test one of these for you if needed.

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Old 11-06-2014, 10:28 PM   #7
ALOKIN
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476whp on teh moonshine

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Quote:
Originally Posted by beef View Post
Im finishing up a build, and im in need of one of these. I was about to buy dccd pro's fuel controller, but I would definitely be willing to test one of these for you if needed.

Sent from my SPH-L710 using NASIOC mobile app
PM me details...
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Old 11-06-2014, 10:39 PM   #8
Cefaln452
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JavaBlackPearl

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I have a 460 in my tank as well... and was curious about what all I need to upgrade as far as controlling it goes.
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Old 11-25-2014, 04:29 PM   #9
crazycraigsti
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2010 Forester XT

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I have the dccd fuel pro, but I am not happy that it runs the fuel pump all the time (they designed it to keep ahead of fuel demand) so I removed it and wired a relay into the stock unit. Even though I have a mildly built motor with the 460 I would love to be a guinea pig as well.
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