new auxillary gas tank

Discussion in 'Hacks' started by draperg1, Feb 20, 2018.

  1. DRONE

    DRONE Dog Chauffeur

    Joined:
    Oct 1, 2007
    Oddometer:
    7,017
    Location:
    Chambers Bay, WA
    What about foam instead of baffles? Educate me.
    #21
    HeidiHo likes this.
  2. Strong Bad

    Strong Bad Former World's Foremost Authority

    Joined:
    Oct 29, 2007
    Oddometer:
    8,705
    Location:
    Omicron Persei 8
    All racing fuel cells use foam inside their bladders. One of the biggest problems with foam is that it eliminates the ability to use a float style fuel gauge, however that isn't an issue with these little aux tanks. Even special made fuel cell foam foam will degrade over time.

    Most people don't make the baffles restrictive enough. Typically on a tank with right angles you cut 1/2 to 1 inch out of each bottom corner. You want the holes/passages as small as possible without restricting fill speed.
    #22
    Bobmws, HeidiHo and DRONE like this.
  3. HeidiHo

    HeidiHo Mad Scientist

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    Feb 6, 2016
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    Well....okay then. Just sharing a thought :-)
    #23
  4. Ebayru

    Ebayru Adventurer

    Joined:
    May 13, 2014
    Oddometer:
    41
    I neglected to mention that the auxiliary tank is plumbed to the carbs via a selector valve mounted near the bike’s tank petcock. I typically run on the bike’s tank down to Reserve then I switch to the auxiliary hack mounted tank. If I run that down to empty I switch to the bike’s tank Reserve. The auxiliary tank has no foam or baffles, but I’ve never noticed any negative effects. I’ve been running this set up for the past 7 years.


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    #24