12-14-2020, 03:22 PM | #71 | |
Drives: 2019 ZL 1LE Join Date: Nov 2019
Location: USA
Posts: 17
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The track runs CCW and wears right side / passenger side tires faster |
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12-14-2020, 06:48 PM | #72 | ||
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
Location: Johnstown, PA
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Toe in is always positive. That picture of the alignment sheet is showing toe out. Notice the rear is positive, it is toe in, as the rear is always toe in, unless you like to live dangerously, haha. I should have clarified better, a picture of the sidewall and the shoulder.
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2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD
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12-14-2020, 07:08 PM | #73 | |
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
Location: Johnstown, PA
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Quote:
Here's a ZLE owner at my track. Pitt Race, turn 1. Notice the LF tire. It is the inner less loaded of the two fronts. Look how the tire is more on the inner half. I suspect it's dragging that inner shoulder a fair amount. Add in Ackerman and more toe out that probably makes it worse. While Ackerman and the toe out help create grip at that tire, grip=tire wear. And we are seeing too much at that inner half. If we had better camber control at the LF, then the tire would be more flat, more of the tread would be utilized. And the use of camber plates which adds SAI, may actually be hurting all of this. And my Gen5 is in the other pics, same corner.
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2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD
Last edited by cdb95z28; 12-14-2020 at 07:37 PM. |
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12-14-2020, 08:22 PM | #74 | |
Drives: 2019 ZL 1LE Join Date: Nov 2019
Location: USA
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Quote:
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12-14-2020, 08:24 PM | #75 |
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
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Which one are the fronts?
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2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD
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12-14-2020, 08:33 PM | #76 |
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
Location: Johnstown, PA
Posts: 3,200
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They don't look bad at all. Maybe a touch too much into the Goodyear emblem in the 2nd and 3rd pic. At times I've completely worn my to the point where the emblem is gone.
These are the same tires that have worn thru on the inner shoulder, correct?
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12-14-2020, 08:37 PM | #77 |
Drives: 2019 ZL 1LE Join Date: Nov 2019
Location: USA
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12-14-2020, 09:11 PM | #78 |
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
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Got it. It's a tough balance to try and find. Killing the inner shoulder makes you want to reduce the neg camber, but you'll have to baby the tires till they gain some temp/pressure so the outer shoulder lives. But right now, those current tires are telling us to run less negative camber.
But as I mentioned, there are other factors in play. I'm not convinced the inner shoulder wear is only a toe out problem. Maybe the toe out plays a part, by causing some of the dragging along of the inner less loaded tire. I think all that neg camber on that inner tire is the main problem. I have an article I found that talks about toe and ackerman. I'll try to dig it up....
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2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD
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12-14-2020, 09:13 PM | #79 |
Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017
Location: NYC/NJ
Posts: 630
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I am running -3.1 camber with the toe out settings (post 58) - zero inner wear now
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12-14-2020, 09:31 PM | #80 | |
Drives: 2019 ZL 1LE Join Date: Nov 2019
Location: USA
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Quote:
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12-14-2020, 09:40 PM | #81 | |
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
Location: Johnstown, PA
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Quote:
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2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD
Last edited by cdb95z28; 12-15-2020 at 10:57 AM. |
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12-15-2020, 06:37 AM | #82 |
Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017
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5thgear look forward to your reporting back on how things progress....
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12-15-2020, 03:44 PM | #83 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
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Good stuff, sub'd
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12-16-2020, 09:54 AM | #84 |
Drives: 2019 ZLE Join Date: Jul 2020
Location: Dallas
Posts: 136
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If you have the time and inclination, you could set your alignment based on the track and direction. Generally speaking, less neg camber on left side front for CCW tracks and less on R for CW tracks. You will generally be faster with better tire wear. Think of how NASCAR sets alignment for oval courses, but applied to a road course. For me, it's more about convenience. I prefer a set it and forget it, and live with faster tire degradation. I do my own alignments and just don't have the desire to reset for every event. I go to about 5 different tracks per year.
Many moons ago we had a pro race team supporting a DE event with tire and service at Motorsport Ranch Cresson CCW The owner and driver put on a clinic about the trade-off between lap times/tire wear and the time/$ to change alignment settings for every track and configuration. He had proven that for a vette, -1.3 camber L and -2.7 camber R, yielded the fastest lap times and best tire wear. |
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