What roll over valve you guys running

Discussion in 'High Tech Retrofits' started by Rickyb1968, May 20, 2018.

  1. 71RS/SS396

    71RS/SS396 Veteran Member

    Messages:
    2,624
    Likes Received:
    27
    Joined:
    Aug 26, 2008
    Location:
    Wake Forest NC
    Those things leak like a sieve when the tank is full.
     
  2. badazz81z28

    badazz81z28 Veteran Member

    Messages:
    16,375
    Likes Received:
    406
    Joined:
    May 4, 2001
    Location:
    Las Vegas, NV
    I’m not really familiar with new cars with roll over check valves. Most new cars are using single inlet pumps and all the vent lines go to the engine bay connected to purge valves to the intake etc. No vents into atmosphere with check valves with today’s emission standards. The computers do control the pumps for deactivation when the engine dies. That’s basically the “protection”.
     
  3. Bandit723

    Bandit723 Veteran Member

    Messages:
    3,145
    Likes Received:
    462
    Joined:
    Oct 1, 2016
    Location:
    Waupaca WI
    jeep.jpeg
     
  4. Bandit723

    Bandit723 Veteran Member

    Messages:
    3,145
    Likes Received:
    462
    Joined:
    Oct 1, 2016
    Location:
    Waupaca WI
    ok then what works?
     
  5. 71RSLS

    71RSLS Veteran Member

    Messages:
    754
    Likes Received:
    162
    Joined:
    Dec 5, 2017
    Location:
    Prairie City, Ia
    I have an anti roll over valve in the 16 gal fuel cell in my Vette and it doesn't leak when the cell is full. There is no foam or baffles in it either and I never see any fuel out of the anti roll over vent. It's been put together for 9 years. Maybe the newer ones suck?
     
  6. 71RS/SS396

    71RS/SS396 Veteran Member

    Messages:
    2,624
    Likes Received:
    27
    Joined:
    Aug 26, 2008
    Location:
    Wake Forest NC
    https://www.iimuch.com/collections/fuel-differential-vents/products/fuelvent2dm This is not a rollover valve but it's a much better vent system.
    The fuel in your tank expands when it heats up, with a full tank that expansion will cause the fuel to climb up the vent line from the pressure of the expansion and out of that rollover valve you have linked. This II Much vent has a chamber to collect the fuel and a tube to vent the pressure, the chamber will self drain back to the tank once the pressure has gone down. I've had that rollover valve that Tanks and other companies sell in at least a half dozen cars and it has always leaked.
     
  7. Bandit723

    Bandit723 Veteran Member

    Messages:
    3,145
    Likes Received:
    462
    Joined:
    Oct 1, 2016
    Location:
    Waupaca WI
    Interesting product. Looks like Ring Bros use these as well.
     
  8. Bandit723

    Bandit723 Veteran Member

    Messages:
    3,145
    Likes Received:
    462
    Joined:
    Oct 1, 2016
    Location:
    Waupaca WI
    And the road leads back to a rollover valve per the II Much instructions.

    The II Much VSB does NOT provide rollover protection. Rollover protection should be installed on the hose between the fuel tank and the port on the bottom of the VSB per manufacturer’s direction
     
  9. 71RS/SS396

    71RS/SS396 Veteran Member

    Messages:
    2,624
    Likes Received:
    27
    Joined:
    Aug 26, 2008
    Location:
    Wake Forest NC
    I would ask what rollover valve he suggests and for a plumbing diagram. I don't disagree it's a good idea to have one, just not the one in your link. I've used the II Much vent without one but I've never put the car on it's lid either.
     
  10. Rickyb1968

    Rickyb1968 Veteran Member

    Messages:
    334
    Likes Received:
    17
    Joined:
    Feb 14, 2018
    Maybe easier to go back to the charcoal canister that came with the car. I got the bracket but not the canister to hook it up. Rick
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.