09-03-2019, 06:13 AM | #43 | |
Drives: '19 ZL1 1LE Join Date: Feb 2019
Location: DFW, TX
Posts: 127
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09-03-2019, 08:19 AM | #44 |
Drives: 2019 Camaro ZL1 1LE Join Date: Apr 2019
Location: Needham, MA
Posts: 35
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I have 10 track days so far this season with my stock 2019 ZLE and am only getting 3-4 track days (typical DE event with 4 25 minute sessions) out of the front OE Goodyear tires. I have the car set at the GM recommended track alignment and keep it that way for street driving, but use a second set of OE wheels with the Michelin Pilot 4S tires for the street. I aim for 34-35 psi hot in the front and rear for track duty. The rear tires do much better and are getting even wear. I am an instructor with my DE club and drive the car pretty hard on the track. I would love to find a fix without sacrificing cornering performance.
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09-03-2019, 11:39 AM | #45 |
Drives: 2019 ZL1 1LE Join Date: Mar 2019
Location: Boca Raton
Posts: 65
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R888r’s do last a bit longer but can’t match the GU3R performance. Close but not quite the same
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09-03-2019, 01:31 PM | #46 |
Drives: 1LEs Join Date: May 2009
Location: DFW - Texas
Posts: 1,319
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I run the G3R on my SS 1LE. When I have time, I flip the fronts on the rims (dismount / remount) and maybe get one or two more track days. [-2.7 front camber]
As mentioned, the rears, on both my car and ZL1's, last MUCH longer than the fronts. Just moving them side to side on the rear helps a lot. I also do that on the fronts, too. |
09-03-2019, 04:15 PM | #47 | |
Drives: 2018 Hyper Blue ZL1 1LE Join Date: Dec 2018
Location: CA
Posts: 1,360
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10-16-2020, 12:14 PM | #48 |
Drives: 2019 ZL1 1LE Join Date: Feb 2017
Location: Gilbert, AZ
Posts: 645
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I got the alignment re-set on my 2019 1LE (street settings) because it was pulling a little and the wheel was a little off-center after 6400 miles and these are the new numbers -
Front: Left camber: -1.3 Rear: Left camber: -1.4 After getting home, I used my toe plates to measure front/rear toe and got - Front total toe-in: 1/8" Almost 1/4" of toe-in in the rear seems a little high, but it shows dead smack in the middle on both sides for factory spec. I am still on the factory G3R's and they're wearing very nicely.
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Old: 2017 SS 1LE
Old: 2017 ZL1 Current: 2019 ZL1 1LE |
10-16-2020, 06:22 PM | #49 |
Drives: 2018 Camaro ZL1 1LE Join Date: Aug 2018
Location: Cypress, TX
Posts: 20
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Really good thread. Interesting because my main concern with my '18 ZL1 1LE is the cost of tracking. That's all I use it for and tires/brakes have proved to be the big expense. Too rough on the street for an old geezer like me.
OEM track settings got me unacceptable outer tire wear on the fronts and pretty good on the rears. I went to -3.4 camber and -0.6 total toe on the fronts for the next set...left the rears the same. Good improvement but still outer tire wear on the fronts. Perplexed, I consulted my local track tech shop. He recommended going back to -3.0 and zero toe on the fronts and going to the soft setting on the rear sway bar. I've also played with cold tire pressure settings and settled on 26 psi rear and 29 psi front. Still getting a tiny bit more outside wear on the fronts than I'd like so am experimenting with going up a pound in pressure before changing toe to slightly out. You know the thing that occurs to me about all this stuff is that is that there is not a perfect setting on the equipment because we are all different operators. If you are 18 with your hair on fire and refuse to brake until the 50' sign is in your grill or an old fart like me just trying to shave a tenth off my best time you will have drastically different setting requirements to get the result you want. I love my 1LE. I'm in awe of the brakes and the torque but the cost of tires and brakes are my biggest $$$ concern. How to minimize that and maximize the fun... |
10-17-2020, 07:53 AM | #50 |
Drives: Fast Join Date: Jun 2013
Location: My Garage
Posts: 76
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I initially thought the inside wear may be due to dynamic toe.
Now that I’ve been through a couple sets of tires and several alignments, I think the issue is the toe setting is not held. It moves after a single session and you end up with 3-4x the amount of toe you thought you had. Which will destroy your tires. As far as heat cycling out, what is the evidence for that? Not all R comps heat cycle out. The NT01 for example is stable till they cord. |
10-17-2020, 08:15 AM | #51 |
Drives: '19 ZLE, S54 E36M3 Join Date: Feb 2018
Location: North Augusta, SC
Posts: 227
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With the track spec alignment on a new set of 3Rs, I had uniform wear on all four corners after two days at VIR. One day at Roebling with the same settings pretty much destroyed both fronts. Where you run makes a huge difference in determining the optimum setup.
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10-17-2020, 10:10 AM | #52 |
Drives: 2019 ZL1 1LE Join Date: Dec 2019
Location: Newnan, Ga
Posts: 123
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Long sweeping hi G turns at RRR Will do it with any under steer...IMO...
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10-17-2020, 01:37 PM | #53 |
Drives: 2018 Camaro ZL1 1LE Join Date: Aug 2018
Location: Cypress, TX
Posts: 20
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I've never run anything but the GY3R's so have nothing to compare to when it comes to heat cycling out. However, I can tell you that the grip falls off the cliff...I mean a difference of 5 seconds per lap at my 2.36 mile home track (MSR Houston). I've been attributing that to heat cycling out. I figure it doesn't really matter since they are so closed to cording by that time.
I confirm two fronts for every rear tire and getting about 400+/- track miles out of the fronts. I have a new set ready to go and believe I will follow Tire Rack's advice on heat cycling them right out of the gate...see if it makes a difference in longevity. Has anybody played around with rear sway bar settings? |
10-18-2020, 11:28 AM | #54 |
Drives: 2019 ZL1 1LE Join Date: Feb 2017
Location: Gilbert, AZ
Posts: 645
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I'll be switching to the non-R supercar3's when mine are toast, which will be soon. I love them just as much as these because you still get most of the grip of the R's but they'll last as least twice as long.
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Old: 2017 SS 1LE
Old: 2017 ZL1 Current: 2019 ZL1 1LE |
10-18-2020, 03:35 PM | #55 |
Drives: Zl1 1le Join Date: Apr 2018
Location: Midwest
Posts: 183
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I have also found that I go through fronts 2X to 3X faster than rears. After reading these posts I'll stop chasing elusive alignment settings and just accept that this is the nature of the car when used in the track.
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10-18-2020, 10:49 PM | #56 |
Sarcasm loading --------
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If the issue really is caused by the toe changing from heavy cornering, what could be done to address that?
Are there any parts currently available that would correct or improve tire cording issue on the ZLE front suspension?
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"The salesman actually told me to stop getting it sideways during the test drive"
2018 MBM ZL1 1LE - Stock 2014 CRT ZL1 574 rwhp, 537 rwtq - SOLD 2010 IBM SS Camaro VVT L99 w/ TR6060 swap, 489 rwhp, 444 rwtq - SOLD |
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