Tire skipping
01-05-2015, 10:47 AM
#61
Safety Car
My C6 did it, my Camaro 1LE does it and my C7 does it. As stated previously.....Its totally normal.
02-10-2017, 02:54 PM
#62
I get very similar hopping from the outside front tire at the track. It feels as if with the road alignment the front tires are not optimally aligned for cornering even on much higher speed corners with little lock (75 mph+) and the outer one is turned in too much relative to the inner, and bangs along due to the understeer. Or that LSD is pushing the car. I was going to go with the factory recommended track alignment of almost zero toe (and some negative camber) and see what happens. The only point here is that it will be interesting to see if this also reduces low speed chatter?
Last edited by JohnC7; 02-10-2017 at 03:21 PM.
02-10-2017, 03:25 PM
#63
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I get very similar hopping from the outside front tire at the track. It feels as if with the road alignment the front tires are not optimally aligned for cornering even on much higher speed corners with little lock (75 mph+) and the outer one is turned in too much relative to the inner, and bangs along due to the understeer. I was going to go with the factory recommended track alignment of almost zero toe (and some negative camber) and see what happens. The only point here is that it will be interesting to see if this also reduces low speed chatter?
As you say, will be interesting to hear about your result.
Last edited by JerryU; 02-10-2017 at 03:27 PM.
11-26-2018, 12:54 PM
#64
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St. Jude Donor '17, '19
I know this is an old thread, but I just got a C7 and it freaked me out when this happened.
Now that i know it is normal, can someone please explain to me why it happens if the front wheels are not powered? My thoughts are if they are free spinning (no power) then they are free to spin at their own speed, as needed. Unless the picture above is true for corvettes and the wheels are parallel, but i didn't think they were.
Now that i know it is normal, can someone please explain to me why it happens if the front wheels are not powered? My thoughts are if they are free spinning (no power) then they are free to spin at their own speed, as needed. Unless the picture above is true for corvettes and the wheels are parallel, but i didn't think they were.
11-26-2018, 01:07 PM
#65
Race Director
I know this is an old thread, but I just got a C7 and it freaked me out when this happened.
Now that i know it is normal, can someone please explain to me why it happens if the front wheels are not powered? My thoughts are if they are free spinning (no power) then they are free to spin at their own speed, as needed. Unless the picture above is true for corvettes and the wheels are parallel, but i didn't think they were.
Now that i know it is normal, can someone please explain to me why it happens if the front wheels are not powered? My thoughts are if they are free spinning (no power) then they are free to spin at their own speed, as needed. Unless the picture above is true for corvettes and the wheels are parallel, but i didn't think they were.
I handle this by not turning the wheel all the way to the lock, or almost all the way to the lock. I think that's what most people do.
Last edited by PatternDayTrader; 11-26-2018 at 01:08 PM.
11-26-2018, 02:58 PM
#67
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St. Jude Donor '17, '19
The short answer is the inside tire cannot turn sharp enough, in spite of the fact that it appears to be turning at a sharper angle than the outside tire.
I handle this by not turning the wheel all the way to the lock, or almost all the way to the lock. I think that's what most people do.
I handle this by not turning the wheel all the way to the lock, or almost all the way to the lock. I think that's what most people do.
11-26-2018, 03:17 PM
#68
Race Director
The fact its at least partially a track car is why it happens.
GM engineers could eliminate this problem, but it would take steering geometry that would diminish the handling capability.
You will get used to it in a week.
11-26-2018, 03:20 PM
#69
Safety Car
Last edited by JMII; 11-26-2018 at 03:21 PM.
11-26-2018, 03:23 PM
#70
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St. Jude Donor '11-'12-'13, '16-'17-'18
11-26-2018, 03:41 PM
#72
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I know this is an old thread, but I just got a C7 and it freaked me out when this happened.
Now that i know it is normal, can someone please explain to me why it happens if the front wheels are not powered? My thoughts are if they are free spinning (no power) then they are free to spin at their own speed, as needed. Unless the picture above is true for corvettes and the wheels are parallel, but i didn't think they were.
Now that i know it is normal, can someone please explain to me why it happens if the front wheels are not powered? My thoughts are if they are free spinning (no power) then they are free to spin at their own speed, as needed. Unless the picture above is true for corvettes and the wheels are parallel, but i didn't think they were.
It’s the race car type tire construction of the OEM Michelin’s. Particularly the low slip angles. Note rubber tired cars don’t get “full Ackerman” front tire turning radius compensation because the tire surface flexes providing some of it. Proof, it goes away with winter and most all-season tires that have more normal slip angles with the same Ackerman steering geometry.
My solution has been for 5 years, when below ~50F turn the wheel less when backing down my driveway in the morning and make a “K” turn. While taking the extra time I think about the smile those tires put on my face when I hit ~1.2 “g” acceleration around the fountain at the end of my street!
Full Ackerman steering compensation could be built in BUT that would reduce the max attainable “g” force in high speed turns. The PDF discusses why.
Last edited by JerryU; 11-26-2018 at 03:44 PM.
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~Stingray (11-27-2018)
11-26-2018, 05:16 PM
#75
Advanced
I have the new Michelin All Season tires and they have not skipped one time compared to the same turn situation in the Michelin Pilots where they always skip consistently. So, I'm guessing rubber type matters a lot too.
11-26-2018, 05:32 PM
#76
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St. Jude Donor '12-'13-'14-'15-'16-'17
11-26-2018, 05:43 PM
#77
Happens a LOT more in the Z06 but again only in low speed sharp turning situations like parking and un-parking (that's not a word, I know).
11-26-2018, 07:15 PM
#78
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As noted in post #72 car companies rely on slip angle to provide some of the needed Ackerman steering geometry that compensates for the different turning radius of the inside and outside tires in a light turn. Softer rubber that does not get as hard when cold certainly helps the all-season tires have less or no chatter.
Last edited by JerryU; 11-26-2018 at 07:18 PM.
11-27-2018, 08:42 AM
#79
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St. Jude Donor '17, '19
Are the wheels on a corvette set parallel or just less angled than "normal" cars?
Great article above. I must have missed the link to it above somewhere.
Great article above. I must have missed the link to it above somewhere.
Last edited by ~Stingray; 11-27-2018 at 08:46 AM.
11-27-2018, 09:01 AM
#80
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I have no chatter when it’s warm and make a full lock turn when I back out of the garage to do down the driveway. When less than 50F I turn the wheel less and make a ‘K’ turn. When 35F I turn even less and make two!
It does no harm but I don’t like the feeling. Been doing this for ~5 years.
Fortunatly seldom have to make two ‘K’ turns when I need to drive in Eastern SC!
Last edited by JerryU; 11-27-2018 at 09:06 AM.