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Model A tire bounce?

Discussion in 'The Hokey Ass Message Board' started by IGOR, Jun 23, 2008.

  1. IGOR
    Joined: Jun 27, 2002
    Posts: 645

    IGOR
    Member

    Have a problem with my p***enger side front tire bouncing. Seems to start at about 50 mph and gets worse the faster you go. I've switched the tires from one side to the other along with the shocks and still the bounce shows up on the same side. What else would cause this to happen? I'm running Vega cross steer, Reverse eye spring, bias plys. Toe in is at 1/8" with 7 degrees on the axle. ???????????
     
  2. brandon
    Joined: Jul 19, 2002
    Posts: 6,382

    brandon
    Member

    what kind of shocks...? :D
     
  3. IGOR
    Joined: Jun 27, 2002
    Posts: 645

    IGOR
    Member

    Just those gas short shocks ya get from Speedway.
     
  4. I have been fighting that same one wheel bounce in the front for three years now. No solution yet, the only thing that seemed to help was a really good tire balance. Now its only there from 50-55 then its gone and its not constant, it comes and goes. But never too violent wher I cannot drive it or feel unsafe driving it.

    I have tried three different sets of tires (radials and biased), alligned 4 times, 2 different sets of shocks, checked balance of drums, checked wheel roundness, switched wheels and tires sided to side numerous times, played with air pressures, ....

    Next I am going to try and balance wheels with the drums, if I don't go broke first trying to figuire this one out.

    Good luck.
     
  5. Tony
    Joined: Dec 3, 2002
    Posts: 7,351

    Tony
    Member

    What tire's??
    A good friend has had nothing but problem's with Firestone bias ply's in the 15" dia..
    He's got 2 34 Fords with the same tires, both car's had a shake that started at 55 or so.
    We've done a ton of work to both to try and solve it, simple stuff like balancing all the way to different springs etc.....and it came down to tires on one car and tires and a possible rim on the other.
    Might not be your problem, and as simple as it sounds, swap the front wheels and tires with another pair if you can..
    After spending week's chasing it with both of these...that's what solved it.....
    I drove his coupe 1600 miles from here to Indy and back and the shake was unreal..we got to indy and actually replaced the kingpins ( slightly worn), rebalanced all 4 tires again and that did nothing.. We then had the front tires shaved and it helped..you could actually see the out of round in them as they were being turned, and it wasn't the rim's..
    Just a thought.
     
  6. gas pumper
    Joined: Aug 13, 2007
    Posts: 2,960

    gas pumper
    Member

     
  7. IGOR
    Joined: Jun 27, 2002
    Posts: 645

    IGOR
    Member

    I'll try that out. I know there's a few sets of 16" front runners around town. Someone also mentioned that I may need to put a panhard bar on it. Think that would do it????
     
  8. steel rebel
    Joined: Jun 14, 2006
    Posts: 3,604

    steel rebel
    Member Emeritus

    Find an old tire shop in your area with a tire shaver. Bias tires are notorious for being out of round. Had mine done and now smooth as gl***.
     
  9. BBobb
    Joined: Feb 5, 2007
    Posts: 1,860

    BBobb
    Member

    I had the same prob and fought it for months.My tires looked good or so i thought (old vintage 16'firestone www,)i finally went to a major tire dealer that had the machine thats more advance than your run of the mill tire balancer and it turned out my old tires were out of round and could not fix no matter how much we tried to balance
     
  10. Tony,

    I have had it with my wire wheels with biased tires, my steel fords with Coker radials and my 40 ford rims with old biased tires. Allways right front bounces, some worse than others, checked the front end out numerous time and alligned twice by me and twice on my buddies allignment rack.


    Its like that christmas song where the lights wont stop blinking.

    My freaking tire won't stop bouncing!

    But its not extreme just a little annoying and tough on the radiator.
     
  11. Tony
    Joined: Dec 3, 2002
    Posts: 7,351

    Tony
    Member

    I hear ya Jim..
    John's sedan and coupe are the car's i'm talking about..
    He's done everything including indexing the drum's to the wheels and balancing as a unit.........
    We spent 4 week's chasing the shake in the sedan before we headed to the Showdown..
    The coupe was unreal. The left front on that would shake, violently at time's, especially right around 65 mph..Actually, it's more of a hop..
    The only way i could describe it was when a boat chime walks, bouncing side to side..wild...
    His tire's are Coker Firestone's. He called them to inquire and they did say they have had out of round issues with the Firestone 16", but not the 15's...
     
  12. mtlcutter
    Joined: Oct 6, 2007
    Posts: 364

    mtlcutter
    Member

    The trick is to have tires shaved so that they are true. That is only if the are bias plys. They do this alot with 4X4 tires with aggresive thread.
     
  13. JohnEvans
    Joined: Apr 13, 2008
    Posts: 4,883

    JohnEvans
    Member
    from Phoenix AZ

    Panhard rod will have absolutly no effect on wheel hop/bounce.
     
  14. Goztrider
    Joined: Feb 17, 2007
    Posts: 3,066

    Goztrider
    Member
    from Tulsa, OK

    Do you have the wheel weights only on the inside of the wheel? This will cause tires to be out of balance, as the balancing machines will add more weight to the back of the rim to compensate for balance issues that require weight on the outside AND on the inside of the rim.

    When I worked in a tire shop that was one of the hardest things to get customers to understand. Just because the machine says "0" when you place the weights inside doesn't mean the tire is balanced.
     
  15. IGOR
    Joined: Jun 27, 2002
    Posts: 645

    IGOR
    Member

    Nope. Weights are on inside and outside of wheel.
     
  16. I had the same problem on the front suspension of my race car. I had a Model front axle; and the steering arms were coming loose. But the root cause was, not only the Houdallie shocks, but the tires were outta round; and the wheels were run out. Those shook everything loose!:rolleyes:
     
  17. IGOR
    Joined: Jun 27, 2002
    Posts: 645

    IGOR
    Member

    Guess I'll give cuttin' the tires a shot and keep the fingers crossed.
     
  18. pecker head
    Joined: Nov 8, 2006
    Posts: 4,453

    pecker head
    Member

    Ain't nothing like high dollar out of round tires ! Why can't they be mounted trued and then sent to the cutomer, unmounted ? I have 2 cars same problem ! No truing machines in my hilljack county !
     
  19. Tony
    Joined: Dec 3, 2002
    Posts: 7,351

    Tony
    Member

    Is there a big truck repair place around? Some of them have the tire shaving machine's from years ago..That's how we got the one's on my buddy's coupe done.
    It was a truck shop in the middle of NOWHERE outside Jamestown Indiana..
    On the truck's that were long hauler's it wasn't uncommon for them to have to shave the tires to true them up..

    And i couldn't agree more on the tires.. It's not like they are cheap by any means..not sure how a large company would solve the problem, but i've heard of enough issue's that something should be done.
    I personally had problem's with some new bias ply's i ran....
     
  20. brandon
    Joined: Jul 19, 2002
    Posts: 6,382

    brandon
    Member

    heres my last scenario...car was still rough riding , and slightly shaking after hitting some decent bumps...i took the front spring apart and got it down to the main and 1 long leaf...drove it down the road , still rough....got it home and started taking it back apart , and decided to try it without the shocks....other than no dampning , it rode like a totally different car....switched to a pair of pro shocks....made a world of difference....might try it ....:rolleyes: brandon:D
     
  21. Dreddybear
    Joined: Mar 31, 2007
    Posts: 6,167

    Dreddybear
    Member

    For ****s and giggles I would swap drums side to side and see what happens.
     
  22. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,065

    Mr48chev
    ALLIANCE MEMBER

    That was on my line of thinking. I have seen a few drums that were quite a bit out of balance right out of the box.

    A couple of more things to look into.

    See if you can find a shop that still has an on the car wheel balancer.
    The strobe light style would be the best but a Hunter wiith the hub that clamps to the rim will work if you can find one with the correct size adapter.

    Jack the wheel up and with something to check runout turn the wheel and see if you do have excessive runout. Most tire shops have a runout gage with a dial indicator and a wheel that rolls on the tread of the tire. At least in the days of bias tires they did.

    If you have excessive runout. Break down the tire and rotate it on the rim half a turn and inflate it and see how it checks out. Quite often you can get the runout down to where it is managable by that method and you can also get a better balance on the tire that way in some cases.
     
  23. 40Tudor
    Joined: Jan 1, 2002
    Posts: 635

    40Tudor
    Member
    from MN

    A road force balance and match mounting will take the guesswork out of Mr48's method.
     
  24. pigwilliams
    Joined: Sep 14, 2006
    Posts: 49

    pigwilliams
    Member

    Firestone Bias Ply's **** and always out of round. Nothin like spending all that hard earned cash to go find a tire shaver. Tires will bounce like crazy around 60mph.
    Just my 2cent's.
     
  25. denis4x4
    Joined: Apr 23, 2005
    Posts: 4,416

    denis4x4
    ALLIANCE MEMBER
    from Colorado

    I had problems with 2 sets of Coker 16" Firestone dirt track fronts. Switched to Metzler's and balanced the wheel/tire/drum as a single unit and solved the problem.
     
  26. Von Rigg Fink
    Joined: Jun 11, 2007
    Posts: 13,401

    Von Rigg Fink
    Member
    from Garage

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