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Thread: surge tanks?

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  1. #1
    Join Date
    Apr 2008
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    Quote Originally Posted by Chip42 View Post
    you can put a surge tank into a stock tank or approved fuel cell. that's pretty clear to me. an external one is less so.

    I'm also interested to see what people think as my ITB 1983 VW GTI has a surge can + added extrnal fuel pump which is the primary feed to the CIS. I got the car this way as payment for a motor build and haven't gotten it on track yet. it's not my primary concern, but i have thought about the legality of such a system. it's all enclosed in sheet metal but the surge can is pretty obvious as to what it is.

    anyone want an 83 rabbit GTI with 1994-issued logbook? fresh trans!
    This is exactly what I want to do... possibly installed in the spare tire well. Need to plan that out a little more but after talking to a few people I know this is a possible solution I just feel it is a bit "grey" (but creative!)

    Stephen

  2. #2
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    Dec 2008
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    Orlando, FL
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    spare well is where the one for my VW is.

    there's a panel that fits over the seperated area. left side is tank, right side is pump, the braided line to the tank is fro mthe main tank pump, rubber line is return from the CIS. blue line feed the secondary pump to the CIS via the other braided line.

    legal?

  3. #3
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    Jun 2001
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    Falls Church, Va
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    Quote Originally Posted by Chip42 View Post
    spare well is where the one for my VW is.

    there's a panel that fits over the seperated area. left side is tank, right side is pump, the braided line to the tank is fro mthe main tank pump, rubber line is return from the CIS. blue line feed the secondary pump to the CIS via the other braided line.

    legal?
    What did you use for the surge tank?
    Enjoy,
    Bill

  4. #4
    Join Date
    Feb 2002
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    My stock K-Jetronic fuel system has an inline accumulator. That is basically what a surge tank is. So I'm just replacing the stock accumulator with a fabricated accumulator.
    David Russell
    IT Volvo 242

  5. #5
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    Dec 2008
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    Quote Originally Posted by EV View Post
    What did you use for the surge tank?
    I don't know what it came from or if it was fab'ed for this purpose. It came with the car and I haven't done that much digging into the fuel system yet.

  6. #6
    Join Date
    Feb 2002
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    If the consensus is external swirl pots are a no-no then you can either purchase or fabricate/machine something like these ATL UK pieces:

    http://www.atlltd.com/racecar/products.php?cat=62
    David Russell
    IT Volvo 242

  7. #7
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    Quote Originally Posted by EV View Post
    What did you use for the surge tank?
    I have seen them made out of everything from an old propane bottle ("free" is a price that everyone loves) to steel and aluminum coolant overflow tanks (brush up on your TIG welding skillz, kiddies !) and generic catch cans.

    Roundy-round Summit is a good source for weird hardware like -http://www.summitracing.com/parts/CSI-931C/?rtype=10

    You could even use one of the 1-gallon mini fuel cells. Put a de-aeration screen in it...it's a "filter" and falls under the "filters are free" rule - http://www.summitracing.com/parts/RCI-2010A/

  8. #8
    Join Date
    Jan 2004
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    raymond NH
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    The RCI thing/mini fuel cell is cool and pretty reasonably priced. Mount to the bulkhead,plumb low pressure lines in and out pull the high pressure pump from the bottom. Best of both worlds,gravity and pressure feed to high pressure pump.
    We were doing this on the injected small blocks in the spo car a few years ago. works great. the surge tank/mini cell wont empty to fast and keeps a constant fuel pressure to the secondary pump even when the primary/low pressure pump gets air due to fuel slosh.

    Dan 77 IT7

  9. #9
    Join Date
    May 2003
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    Colchester, CT, USA
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    So, I'm going to be the prick on this one. What's the spirit of the rule? (or lack there of) Sounds to me like there isn't anything that specifically allows it? Not matter what you call it..........

    Then on the other hand I couldn't give two craps whether you have one or not and if you beat me it ain't cause of THAT!!
    Jeff L

    ITA Miata



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