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Racing tires don't hold air long!

Discussion in 'The Hokey Ass Message Board' started by hugh m, May 26, 2010.

  1. hugh m
    Joined: Jul 18, 2007
    Posts: 2,143

    hugh m
    from ct.

    Guys, anyone know of anything that can be brushed or sprayed inside a racing tire so it'll hold air for more than a week? (other than $70 tubes?) Thanks.
  2. There just aren't enough layers of rubber in the carcass to keep the air in...

    You could try coating them with Slime, or some other "permanent" tire sealer. I think that stuff only works if there is an actual puncture, though...

    Best idea is to put the car on jackstands and keep the weight off the tires. Then when they DO go flat, the sidewalls don't take a set.
  3. Steves32
    Joined: Aug 28, 2007
    Posts: 1,280

    from So Cal

    Tubes are the answer.
  4. Tman
    Joined: Mar 2, 2001
    Posts: 36,042


    Buy a jar of pure Latex. We use it in tubeless MTB tires.

  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 30,845


    They are actually tubeless tires? Also is it the tire that is letting air leak out or the rim?

    I'd air them up and give them a dunking and see where the leaks are. If you haven't already done that.
  6. Larry T
    Joined: Nov 24, 2004
    Posts: 7,734

    Larry T

    Folks around here use dishwashing soap. Give 'em a couple of coats on the inside, let them dry and see what happens.
    Larry T
  7. Butch/1
    Joined: Jan 30, 2008
    Posts: 97

    from Dublin ,Va

    I think that if you have access to Nitrogen it will help. I understand that it does not permeate through the the rubber like compressed air. I guess that is why all the NASCAR teams use it. My 2 cents.
  8. draggin'GTO
    Joined: Jul 7, 2003
    Posts: 1,774


    All of the drag racers I know who are running their slicks without tubes coat the insides liberally with Dawn dishwashing liquid.

    It works.
  9. todd1955
    Joined: Oct 28, 2008
    Posts: 24

    from sweet home

    +1 for dish washing soap or car washing soap - it does help
    Joined: Jun 3, 2005
    Posts: 8,587


    I heard the same about nitrogen. I also vaguely remember something about dishsoap mixed with baby powder and brushed on the insides of the sidewalls. Wasn't perfect but it lasted weeks longer. This was for running 14" drag slicks w/out tubes.
  11. '54Caddy
    Joined: Sep 11, 2009
    Posts: 929


    The nitrogen usually works, also put plenty of bead sealer on the bead before you set it.
  12. onelowc10
    Joined: Oct 28, 2007
    Posts: 95


    Yea the front tires of my opel drag car dont hold air for nothing, all the soap does is give it another two weeks,was told by everyone get used to it.
  13. sota
    Joined: Oct 14, 2006
    Posts: 717


    Nitrogen is used in racing for only one reason over air.Nitrogen will keep the same air pressure better then air,therefore the diameter tire size will say the same. There is nothing worse then setting up a car before a race and have the handling go away and when you come in and measure the tires the stagger is off by a mile from what you started with.
  14. hugh m
    Joined: Jul 18, 2007
    Posts: 2,143

    hugh m
    from ct.

    Thanks for all the replys, you'd think there would be a demand for a product to seal them up, guess the guys who race heavily use up their rubber so fast it's not an issue. Never heard of the soap trick before, or latex...will try both.
  15. Lost in the Fifties
    Joined: Feb 25, 2010
    Posts: 447

    Lost in the Fifties

    Have used Dawn dish washing liquid in slicks for years with good results. I always use the bolt-on valve stems, too. Be sure the tire beads are clean & well lubricated with the soap when you air them up.
  16. Pete1
    Joined: Aug 23, 2004
    Posts: 2,074

    from Wa.

    I have never had problems with losing air except out the bleeders as it is supposed to.
    I run Hoosier tires on Weld beadlock spline drive wheels.
    When you mount them you MUST be sure there is no debris stuck to the bead area.
    The seal must be perfect.
    I have a couple of wheels that I use for spares that are slightly bent in the bead area and I use tubes in them. Works fine. Race tubes are not cheap though.
  17. Tman
    Joined: Mar 2, 2001
    Posts: 36,042


  18. Fedman
    Joined: Dec 17, 2005
    Posts: 1,163


    dish soap always worked for me as well.
  19. Flatheadguy
    Joined: Dec 2, 2008
    Posts: 2,037


    Very good response!! Actually, back in the days when I was racing Trans-Am (not Pontiacs) and IMSA Camel Series, we used nitrogen for tires and more. First of all, in tires the heat coefficient, air common air, caused the pressures to increase during a race. So, nitrogen, an inert gas, was used.
    Another benefit.....all our air tools were run off the nitrogen bottles. Pure inert issues with moisture and so on.
    Oh, yeah, electric genereators were not allowed in the pits. Electrity and fuel don't mix well.
    One more thing.....the road race tires had pliable sidewalls and they ALL leaked, but not a problem because all tire pressures were set before hitting the track. Every time. The very slow leakage was never a problem.
  20. Toymont
    Joined: Jan 4, 2005
    Posts: 1,379

    from Montana

    We have the same problem with the Goodyears on the front of the Strange Days Belly tank. they go flat in a day and it is out the sidewall,(we had em dunked to make sure), The tires on the rear hold air great
  21. holeshot
    Joined: Sep 18, 2009
    Posts: 1,519

    from Waxahachie

    HUGH...It seams like there was an invention a while back that i believe was called...t-u-b-e-s...POP.
  22. greeno
    Joined: Feb 2, 2006
    Posts: 144

    from Fresno,Ca.

    Remove tires and brush in double coat of Weldwood water based contact glue, let dry and remount tires. Make sure you coat the side walls.
  23. X2 and don't be shy .lay it in there-it works.:eek:

  24. Nitrogen is a "non-Newtonian" fluid, temperature has no effect on it, as in expanding or contracting and altering pressure.

  25. I used to run Hoosiers on pavement and they would bleed down during the week as the car sat. They bled air out of the sidewalls. I had laid a suspect tire down and soaped up the bead and sidewall looking for a mystery leak. I came back a few minutes later and the bubbles were on the sidewall, not the bead.

    I'd run a tube in my LR only, as I ran the pressure down to 8 lbs. It kept the tire on the rim too. That tire never bled down.

  26. Just make sure it isn't the wheel itself. I have seen more then one of the skinny front weld wheel/centerlines leak where the two halves of the wheel join together. The wheels (as I recall) are siliconed at the joining seam from the factory.
  27. hugh m
    Joined: Jul 18, 2007
    Posts: 2,143

    hugh m
    from ct.

    Last edited: May 28, 2010
  28. At the real races you only drive for about 1320 ft. Check pressures between rounds.

    Well that and 70 dollar tubes are not an issue.

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