Road course tire wear question-

Discussion in 'Suspension and Chassis' started by Drlee50, Aug 21, 2018.

  1. Drlee50

    Drlee50 TMO Race

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    Clockwise track, even wear on all tires except inside tread passenger front- it got wore down a ton. Camber equal and only 2.2 degrees.
    You would expect outside wear on drivers front.

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  2. Eric62

    Eric62 TMO Intermediate

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    I am very familiar with Mid-Ohio as I have dozens of races and track days there. If you reduce the negative camber on the RF, the car will stick better mid-corner with less understeer. You will loosen the car up (oversteer) in the 3rd gear turns of the keyhole and carousel but add a bit of understeer in the faster left hand 4th gear turns 1, 7 and 14. Evens the tire wear and will make the car turn faster lap times. Since the car will lead right, dial back the caster 1/4 to 1/2 degree on the left side of the car so it will drive straight.
     
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  3. Drlee50

    Drlee50 TMO Race

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    Well NOW you tell me! Lol!! I won't be back there again this year but I will heed that advice for next season. Im really hoping to have more suspension stuff by then as well. (Watts/ coilovers/sway bars) that will make a big difference in this solid axel.
    Thanks Again!
    I will say the keyhole and carousel cost me the most time. I had no rear grip and had to take those way too slow. I was pretty happy with 5 6 7 thunder alley etc. Very fun track with the elevation and blind crests.
    The facility on the other hand really needs some serious updates. The bathrooms were disgusting and the showers were horrific. Camping amenities sucked.

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  4. Eric62

    Eric62 TMO Intermediate

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    Sorry this was too late for you, I haven't been on this site recently.

    Rear grip in both the carousel and keyhole can be a matter of patience and restraint. You are in 3rd so lots of power is available. The turn is long and slow. Power too early makes the car push. Too much power makes it spin. Tell yourself "patience, patience" under your breath and feed power in a bit late and easy. It will give you the best exit speed that way.

    You can also "take out some wedge" - said in a southern accent once - you have adjustable spring seats in the rear. Un-load the left rear to add a little understeer or even use a lower rate spring in the LR. You've got an unsymmetrical setup already, what's a little more?
     
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  5. tetstang

    tetstang TMO Intermediate

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    As the car slides on turns, the inside passenger tire is dragged across the track, in your case, a CW track with a negative camber front setup. In the turn, that portion of the RF tire has the most contact with the track, the car is sliding and scrubbing the inside. If you have a photo of a long fast CW sweeper, you may see your RF outside tread airborne, with just 1/3 or less of the inside in contact with the track. Wears quick! I run Thunderhill out here in CA a lot, and T2 is a long fast CCW sweeper..... My LF inside is always the first to cord. My car is setup for road course, so can't really setup for just CW or CCW or specific tracks. Just rotate and have fun!
     
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  6. Drlee50

    Drlee50 TMO Race

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    My thought was to reduce camber but that screws up so many other portions of track dynamics . something other than stock suspension would probably help too. That money train gets put of control so fast tho.
    Thanks for your reply

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