Question about Tire debris on Rims
10-31-2018, 08:05 PM
#16
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you have to be talking about off the wheels, as your post indicated and referenced. but on the tread? the only guys ive ever seen take rubber off the tire, because its near welded to the surface, even warm, is with the hot powered puddy knife. 
the rubber i picked up in the race , will probably last me 200miles of street driving before it all comes off.
the rubber i picked up in the race , will probably last me 200miles of street driving before it all comes off. 
10-31-2018, 08:45 PM
#17
Rennlist Member
I mentioned tires too. I scrub off tires with a hard hot lap or two, or when cold at home via screwdriver. C2s, Trofeo R, R6, R7 ... all of em over many years. Street driving would take a long time, not enough temp to scrub, just slow wear off. Maybe our track surfaces are more abrasive up here. Good luck.
i just tired to pull a glob off the A7 from Sonoma in my garage and had to stop, it was going to take a very long time. hey, whatever works.
10-31-2018, 09:01 PM
#18
Rennlist Member
11-01-2018, 10:51 PM
#19
Though I seldom have an issue between sessions (except for when the rubber blob get stuck between the wheel and the brake caliper-what a mess that is). I always totally clean the insides of the rim when I get home. The blobs come off easily when the wheels are cold, though the streaks require chemicals (I use Klasse AOI). This is also a great opportunity to closely inspect each wheel for stress cracks and damage. It’s also important to get all the brake dust off ASAP before it hardens.
11-02-2018, 12:11 AM
#21
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11-02-2018, 04:46 PM
#23
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does that count as a heat cycle? trust me ........it comes off the tires with a few laps, if it doesnt, it just means you picked up more rubber ....... recently , at the run offs. i ran the same hoosiers in two sessions and the build up was on one side of the tire. flipped them and the build up was then on the other sides of the tire (same side relative to the car)... unless it was a magic trick, the build up always comes off , unless you are just driving survey laps............or two and from the track.........which i use to save the actual race tire. by the time the build up is removed by driving, its race time again! no scraping necessary
trust me ........it comes off the tires with a few laps, if it doesnt, it just means you picked up more rubber ....... recently , at the run offs. i ran the same hoosiers in two sessions and the build up was on one side of the tire. flipped them and the build up was then on the other sides of the tire (same side relative to the car)... unless it was a magic trick, the build up always comes off , unless you are just driving survey laps............or two and from the track.........which i use to save the actual race tire. by the time the build up is removed by driving, its race time again! no scraping necessary
11-04-2018, 01:03 PM
#24
Rennlist Member
+1
May take more than 1 warmup lap but clag does come off (or evens itself out) once tires get worked up to temperature. If it doesn't, just deliberately work the problematic tire harder in a few corners and vibrations should go away. As already suggested, best is to not pick up clag on cool-down lap and to not leave it to cement itself into the tire as it cools down. In 12 years DE and 9 years racing I've never had to scrape any clag off tires with a screwdriver, torch, or a knife. I'll ask my race-support guys if they'd ever done it, but I'd be surprised if they did.
May take more than 1 warmup lap but clag does come off (or evens itself out) once tires get worked up to temperature. If it doesn't, just deliberately work the problematic tire harder in a few corners and vibrations should go away. As already suggested, best is to not pick up clag on cool-down lap and to not leave it to cement itself into the tire as it cools down. In 12 years DE and 9 years racing I've never had to scrape any clag off tires with a screwdriver, torch, or a knife. I'll ask my race-support guys if they'd ever done it, but I'd be surprised if they did.
11-05-2018, 05:23 PM
#27
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Sofro and his guys back in the "day" , showed me that simple car wax was enough to make the clag come off easier between sessions. however the best bet is to do this when the wheels are hot and so is the rubber. when it cools, and there is a lot of it, it can be a chore. i use a damp dish towel with gloves and it seems to work well.
11-05-2018, 07:25 PM
#28
Rennlist Member
I use REJEX wax. Amazing stuff.