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Post by wonderwoman on Jul 10, 2013 5:42:24 GMT -9
For those of you wondering what in the heck was going on with my car and the front-end shake that's been scaring the EMT's in the shutdown area---did some close inspection after 7/7 race and found a MT front runner tire (bias ply) wasn't so "ply-ed" anymore--it's literally coming apart inside, the belts have seperated. Time to replace both without further a-doo-doo--which is what I'll be if I don't !
Good thing I didn't have a blow out
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Post by ProStreetNova on Jul 10, 2013 8:17:46 GMT -9
How old are the tires and how did you inspect them to see the problem (inside or outside). I never worry about mine, but maybe I should.
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Post by wonderwoman on Jul 10, 2013 14:52:33 GMT -9
5 years
jack up the front end and rotate the tire on the spindle watching carefully at the outside diameter's edge. If you have a rupture in the plies, it looks just like a "flat spot" where the cords have stretched and relaxed reducing the radius or "roundness" of that location.
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Post by wonderwoman on Jul 12, 2013 5:53:06 GMT -9
Got to thinking last night--I wonder how much this tire is out-of-round is due to scuffing/dragging by locking the front brakes during the burnout? Certainly looks like a flat spot(s) indeed--would happen again.
Need to rethink my burnout strategy
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Post by ProStreetNova on Jul 12, 2013 8:31:47 GMT -9
I slide my fronts too just a bit at the beginning of the burn-out. I really like how Mighty Mike does his burn-outs, he doesn't stay in the box to long before he's rolling out.
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Post by wonderwoman on Jul 12, 2013 21:41:43 GMT -9
that's what I'm thinking I need to do more of--not hold the front brakes so long. Only problem is when the rear tires finally bite with that sudden jerk moving forward in the burnout, it's real hard on the drivetrain.
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Post by wonderwoman on Jul 12, 2013 21:48:48 GMT -9
Nobody had the front runner size I needed locally, so I snagged them on Amazon with free shipping at a decent price!
Hell, they even shipped 'em second day air--received them today. Not too shabby
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Post by oldbluegoat on Jul 12, 2013 23:33:31 GMT -9
That makes me wonder aout mine they look like new and ran smooth the last time out but they have been setting on the trailer for over a year I will find out on the 19th. whatsize were your tires? Minehavent been slid.I know what you mean about drive train strain The last time I was at the track with the sick motor Ichanged the launch tecnique and now seem to have alot of slack somewhere like a ujoint I hope.good luck
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Post by AkRacer on Jul 13, 2013 6:37:37 GMT -9
The burn out is one of hardest things on a car. If there is not enough water in the water box it's even worse.
Just think of the shock load going through the drive train. Hint! Make sure there is water put down before you roll in.
I'm not sure about flat spotting your tires during a burnout? Have think about that a little more.
Don't forget, your front tires are wet after going through the water box, so they won't take a set right away. Also your in someone else's rubber.
Sitting on the floor or a trailer for 8 months isn't good on them either. Jack up the car or take them off and store them on their sides is better.
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Post by wonderwoman on Jul 13, 2013 17:05:51 GMT -9
OBG--they are 24.0/4.5-15 Mickey Thompson front runners.
By the way--the headlines on ARP website says the T&T is cancelled for 7/19 and they'll be doing that only 7/24.
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Post by wonderwoman on Jul 13, 2013 17:07:57 GMT -9
AkR--yup, on jackstands every winter, no question. Heck I even remove the tire near the gas furnance as ozone from an electic motor is bad for tires. The problematic front tire wasn't even close to the furnace in the garage anyway.
My take on flat-spotting (whether cord failure or just abrasion) was in consideration of a front tire sliding especially when the burnout seems to veer right or left and scrubbing the offended tire. A flat spot would be favored repeatedly simply because the slipping wheel might stop rotating at the flat spot and slide instead.
Just found today that all that "shimmy" toasted my steering dampner too--it's leaking. <sigh> Time to throw more money at the beast !
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Post by ProStreetNova on Jul 14, 2013 5:17:29 GMT -9
My Rear Slicks are the Soft Compound type. I wonder if it's true, that the compound leaks out while sitting over winter, like some old guy told me once.
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Post by wonderwoman on Jul 14, 2013 10:00:45 GMT -9
I don't know about compound "leaking out"--I think the compound just breaks down over time, leaving the tires more vulnerable to failures.
I was thinking this morning--wouldn't it be nice to avoid getting the FRONT tires wet when performing the burnout ? I mean, roll the fronts through the water on your way to positioning the rears to make ready---well, guess what? Your front tires are WET [duh] and slide if you're locking up the front end. I wonder if it's "legal" to drive around the water box and BACK INTO the burnout box ?
Ha-ha...maybe I'll invent some solenoid-activated casters under the front end of the car that'll jack it off the front tires when rolling through the water !!! (;->
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Post by AkRacer on Jul 14, 2013 19:09:47 GMT -9
The idea of your tires flat spotting on the burnout doesn't hold up. In order to flat spot a tire it must be sliding and generate enough force to cause a flat spot.
Unless your doing a burnout to half track with your front breaks locked, I can't see a normal burnout causing a flat spot.
I believe you just have a bad tire that just showed itself.
The one that may know more then any of us is Mighty Mike. He'd be the one I would ask.
As for the compound issue my tires were about a quart low between the two. Found that in my first burnout.
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Post by wonderwoman on Jul 15, 2013 18:27:22 GMT -9
thanks AKR
you're probably right about flat-spotting and age. A small, tight tire like that is more susceptible to hardening of the compounds and becoming out of round too I suppose.
But explain "a quart low"...I don't get it about the compound "leaking out".
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