Bead locks versus liners

Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by jay70cuda, Jan 26, 2017.

  1. jay70cuda

    jay70cuda Member

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    anyone have first hand knowledge about switching from one to the other . Making a change do the dark side and leaving my clutch behind for a converter. Some say beadocks are fine and others say converters want liners so you can stand on it sooner. This is a promod car so I would like to see if anyone has expirence good or bad.
     
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  2. Aussiebattlr

    Aussiebattlr Member

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    Very interested in some feedback on this question also..
     
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  3. GTPerf

    GTPerf Member

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    Liner's tend not to shake as easy and if they do my driver says he can drive through it usually
     
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  4. overkill69

    overkill69 Member

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    We are looking to make the switch for an automatic screw promod. Apparently, the liner has less bite and will spin where a beadlock tends to shake.
    Good luck finding anything used.
     
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  5. GTPerf

    GTPerf Member

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    I don't think it's as mush less bite as it is the liner supports the sidewall
     
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  6. jay70cuda

    jay70cuda Member

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    Well we're gonna find out as I just bought a set.
     
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  7. Jason Green

    Jason Green Member

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    In for feedback also, been thinking about liners for my car
     
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  8. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    I think the stiffer sidewall tires they make now kind of mitigate some of the advantages of the liner. I think the main thing the liner does is control the sidewall by stiffening it and controls squat. The drawback is the added weight. Also depending on if you have the new style knurled bead, you have to keep track of how much the tire rotates on the bead. Spin balancing with a liner is a must, IMO.

    I have not tried liners on a Pro Mod. If we were still running on the 34.5/17 Hoosier I would probably have them. But the 17/34.5 has a stiffer side wall and is a little easier to get wheelspeed, so I think it really acts like a liner tire with the benefits of a bead lock.

    Still with a bead lock, if you really stick the tire and get it rolled up, you will get into some violent tire shake. A couple years ago we had a few issues on a TAD launch with the 17/36 on bead locks. It basically left with no timing, went like 1.04 60'. It just kind of waddled around, said, ok, we're going slow, no big deal. I really think with the conventional side wall tire, it would have got all kinds of pissed off. Hell I have seen liner tires get all kinds of pissed off when the driver lets the clutch out, then hits the throttle. That could also be the difference in a converter and a clutch...

    I think the liner is needed more with a clutch because you don't have the benefit of multiplication at the launch. Get the wrong set up with the clutch and it just tries to bury the tire. While it can be done, it's much harder with the converter to be that far off at launch. I think with a combination of timing at 0.0 and launch rpm you can get the tire to do what you want it to do with a beadlock a lot easier than you can with a clutch
     
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  9. Nitro Madness

    Nitro Madness Super Comp

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    You might wanna check out the tire shake article in the Spring 2017 issue of Nitro Madness Magazine....by Randy McMahon....he explains the different types of tire shake and his conclusions on recovering a run that shakes...mails Feb 20th and should be in your mailbox March 1st...
     
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  10. TOL

    TOL Active Member

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    How do the rest of us mere mortals get a copy?...
     
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  11. Nitro Madness

    Nitro Madness Super Comp

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    Hoping Will won't pull this response....but it's free - just sign up at www.nitromadness.com
    Just 2 issues per year....Spring & Fall
     
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  12. turbo69camaro

    turbo69camaro Member

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    Just going off of our car there is one basic clutch set up. base stays the same counter weight changes very little.launch rpm stays close to the same. Do all of the wheel speed control with the grid Try to lock up the clutch ASAP in the gear change.Clutch is almost on auto pilot and along for the ride.Very anal on clutch disk floater prep between races. So is does the something every time.Being able to pull timing out at the gear change while locking up the clutch has fixed alot of shake issues. I have a turbo pro mod so i know its a apples to oranges comparison but i like hearing what others are doing
     
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  13. jay70cuda

    jay70cuda Member

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    Are you the junkyard guy in Canada or New York who had petty at Grandbend ihra race ?
     
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  14. Jason Green

    Jason Green Member

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    Are there different P/N tires to use with a liner and with a beadlock?
     
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  15. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    No, just whichever tire suits your preference. On a Hoosier, if 17 is the first number on the size, it's a "wheelspeed" tire. if 34.5 or 36 is first number it's the conventional tire.
     
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  16. Jason Green

    Jason Green Member

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    What's the difference on the "wheelspeed" vs. conventional? Is it in the sidewall?
     
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  17. overkill69

    overkill69 Member

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    Wheelspeed has a narrower cross section. I've run both and there is a difference in appearance and performance.
     
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