Who is experiencing cording of R6's
10-15-2009, 04:42 PM
#1
Burning Brakes
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Who is experiencing cording of R6's
I have talked to a number of drivers who are experiencing cording issues of non loaded wheels recently These cars are all meticulously maintained with conservative race/track alignments. Personally I have corded the right front inside at lightening where typical where is outside. The remaining portion of the tire looks great. We can not find any wearing suspension parts and the toe looks fine, having just been aligned.
We are wondering if being a beveled vs a squareed tire if there is just not enough rubber on the edges.
Any similar issues or thoughts?????????????????????
We are wondering if being a beveled vs a squareed tire if there is just not enough rubber on the edges.
Any similar issues or thoughts?????????????????????
10-15-2009, 04:51 PM
#2
Drifting
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I run -2.7 camber up fron but the last 2 sets of R6's I have worn the OUTSIde of the front right wheel. Both times I took it back to the shop for alignment and they found no issue. I was planning to increase front camber as it is costing me a fortune (both sets less than 10 HC)
may be it is just me driving?
may be it is just me driving?
10-15-2009, 04:51 PM
#3
Drifting
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I run -2.7 camber up front but the last 2 sets of R6's I have worn the OUTSIde of the front right wheel. Both times I took it back to the shop for alignment and they found no issue. I was planning to increase front camber as it is costing me a fortune (both sets less than 10 HC)
may be it is just me driving?
may be it is just me driving?
10-15-2009, 04:54 PM
#4
I have corded the outside fronts of two sets running nearly 4 degrees of negative camber. Both after ~12-15 heat cycles. Rears wear perfectly. This is on a 968 with 8.5" fronts wearing 245/40/18s.
No problems with the inner edges.
Seems I have the opposite problem??
No problems with the inner edges.
Seems I have the opposite problem??
10-15-2009, 05:16 PM
#5
Rennlist Member
I run a close to -3 camber.......
After 2 race week-ends my shop tells me they are all wearing beautifully even.....
Before the new suspension and set up I was cording the outsides much sooner than the insides.....
In my case it had alot to do (if not all of it) with the old suspension and old set up....
After 2 race week-ends my shop tells me they are all wearing beautifully even.....
Before the new suspension and set up I was cording the outsides much sooner than the insides.....
In my case it had alot to do (if not all of it) with the old suspension and old set up....
10-15-2009, 05:34 PM
#6
I think this problem is specific to the Lightning circuit in NJ. I have the same problem. I run the Michelin Pilot Sport Cups by the way. Last season I corded 3 different tires on the right front of my 993, all on the inside. Last Mon I corded another in the same way. When at lightning I try to rotate my tires and put a tire that is almost done on the outside shoulder onto the right front. Also after a few sessions with a good tire on the right front I'll move it to the left front to finish it up. This way I can usually balance the wear on my tires. The culprit is probably the light bulb turn. My front camber is set to -2.8 with zero toe.
Pete
Pete
10-15-2009, 06:21 PM
#7
The Lightning course will definitely chew up the tires, and I'd be hesitant to blame anything else if that's your only data point.
With that being said, I have noticed that I'm recently starting to get significantly worse wear on my inside edges. I've worn down a set to the steel belts after approximately 15 heat cycles.
With that being said, I have noticed that I'm recently starting to get significantly worse wear on my inside edges. I've worn down a set to the steel belts after approximately 15 heat cycles.
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10-15-2009, 06:42 PM
#8
Drifting
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As I have the same issue I would love to know if other front engined 944 or 968's have this issue? I checked fender wear as I run same size wheels and they are ok!
10-15-2009, 07:02 PM
#9
Three Wheelin'
I'm still trying to figure out why you are cording your spare tire as it is the only tire that is not loaded. But seriously, right tire has the easy job at lighting and if you are good on toe and camber something is weird. What kind of pressures are you running? Are you sure it is not rubbing on something up inside the wheel well? You'd be amazed hw far your tire can travel up inside there. Lightning does chew up tires, must be something with the pavement.
10-15-2009, 09:48 PM
#12
Drifting
The timing of this post is perfect. I have a 968 with 18's and I've corded the left fronts at Thunderbolt twice now in less than 15 heat cycles. I run over -3 camber and have no issue with the right front. I think it's track specific because the wear is far less at Lightening and Lime Rock where I've run the 18's with a similar set up. I do think the 18's wear quicker than the 17's I previously run.
One thing that's worked is to flip the fronts every few runs to equalize wear.
One thing that's worked is to flip the fronts every few runs to equalize wear.
10-15-2009, 10:46 PM
#13
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I would look at the track...where mid ohio is pretty easy on tires Putnam park is like a cheese grinder. Also, I believe how your hc the tire on the 1st cycle does matter. Also, does the car u.s. or o.s.?
10-16-2009, 08:56 AM
#14
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Track certainly matters for wear rates, but the wear patterns I'm leaning more towards alignment and suspension setups. We've got much higher rates than average, with 600# front springs and 34mm rear t-bars - car may also be lighter than some, scaling around 2550 with me in it. We've definitely experienced varied wear based on camber settings. I should mention I'm also running less swaybar than most - 23mm up front, 19mm in the rear. No Weltmeisters, just factory parts.
With 2.75 deg front and rear, we get very nice even wear across the tread face, with the rears wearing slightly faster.
But it's not as fast as it could be. With camber up to 3-3.25 deg front/rear, the car's much faster, but does wear the insides. We rotate agressively to try to mitigate that.
They eventually cycle out and we pitch 'em before we cord them; maybe 1-2 cycles before cording, they'll get a mild low spot where each circumferential tread depth groove was. Once that becomes evident, the tire usually has no good grip left and is at least a second, if not two, slower than new. Good for scrubbing in brakes, that's about it.
Of course - we are racing, not DE.
Depends, how bad you wanna go fast???
With 2.75 deg front and rear, we get very nice even wear across the tread face, with the rears wearing slightly faster.
But it's not as fast as it could be. With camber up to 3-3.25 deg front/rear, the car's much faster, but does wear the insides. We rotate agressively to try to mitigate that.
They eventually cycle out and we pitch 'em before we cord them; maybe 1-2 cycles before cording, they'll get a mild low spot where each circumferential tread depth groove was. Once that becomes evident, the tire usually has no good grip left and is at least a second, if not two, slower than new. Good for scrubbing in brakes, that's about it.
Of course - we are racing, not DE.
Depends, how bad you wanna go fast???
