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Old 03-18-2009, 03:19 PM   #1
mtcs
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Default Draining pump gas? For Race gas....

hey,
I was wondering how all you high hp people drain your fuel when wanting to run Race fuel.

I have been told to drop the fuel tank and get a bung and plug welded on the lowest part of the tank so I can simply open the plug and have all the fuel drain out so that i can refill the tank with VP109 race fuel.

Using a siphon is not an option because there is no way of getting every drop of the fuel out. I need to be able to run untained race fuel in my tank.

How do you guys do it?
Ben
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Old 03-18-2009, 03:29 PM   #2
rjrutzky
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When I switch from pump to race, I just run it super low and idle the rest out. I then put a full tank of race gas in to make sure any pump gas gets gobbled up by my super race gas molecules
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Old 03-18-2009, 03:37 PM   #3
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Quote:
Originally Posted by rjrutzky View Post
When I switch from pump to race, I just run it super low and idle the rest out. I then put a full tank of race gas in to make sure any pump gas gets gobbled up by my super race gas molecules
Do you run it so the tank is completely empty?
Wouldnt the fuel pump eventually take a sht cause it was running with no fuel going through it...
or how does it work....
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Old 03-18-2009, 03:41 PM   #4
mick_the_ginge
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Disconnect the fuel return line in the engine bay and connect it to a hose which drains into a can. Then just idle the engine until the return starts to splutter.. hey presto, tank empty, or at least low enough
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Old 03-18-2009, 03:46 PM   #5
mtcs
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Quote:
Originally Posted by mick_the_ginge View Post
Disconnect the fuel return line in the engine bay and connect it to a hose which drains into a can. Then just idle the engine until the return starts to splutter.. hey presto, tank empty, or at least low enough
Pretty good...i might try that insteead of droping the tank and going through all that aggrivation.
just dont want to kill the Walbro fuel pump...
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Old 03-18-2009, 04:07 PM   #6
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my take has a drain plug, yalls dont????
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Old 03-18-2009, 04:21 PM   #7
mtcs
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not on the 00 RS
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Old 03-18-2009, 04:43 PM   #8
seanathanq83
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o ok didnt know what
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Old 03-19-2009, 01:22 AM   #9
mtcs
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think I got it...
going to drill a small hole into my fuel pump bracket having it go into my fuel tank. Next, i'll install a line that will have a weighted tip so that it remains on the bottom of the tank at all times. From that line to a drill pump and finally into a container. Should work perfectly (I hope)...
what you guys think? got the idea from youtube. lol

Last edited by mtcs; 03-19-2009 at 01:34 AM.
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Old 03-19-2009, 02:13 AM   #10
turboL
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sounds sketchy, drills and fuel fumes are a recipe for you dying. Return line idea is best.
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Old 03-19-2009, 02:42 AM   #11
mtcs
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was just an idea...really not sure what im going to do yet. got two weeks before I need it.

Disconnecting the fuel return line would def do it but what kind of damage might I do to my walbro? Dont want to end it's life way prematurely...

any thoughts?
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Old 03-19-2009, 02:56 AM   #12
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Put a fuel cell in the trunk.
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Old 03-19-2009, 09:01 AM   #13
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when draining my tanks in the past, I'd had just jumped 12v's to the fuel pump and pulled the feedline and drained it fast...

I like mick's idea...as its easier but slower


I use a tuthill fuel transfer pump now.

Last edited by Homemade WRX; 03-19-2009 at 09:16 AM.
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Old 03-19-2009, 10:46 AM   #14
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I either pull the return line or run it low and add a LOT of racegas (more fun )
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Old 03-19-2009, 12:02 PM   #15
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Quote:
Originally Posted by mick_the_ginge View Post
Disconnect the fuel return line in the engine bay and connect it to a hose which drains into a can. Then just idle the engine until the return starts to splutter.. hey presto, tank empty, or at least low enough
This is how we always do it.

Doug
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