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#1 |
![]() Drives: 2018 ZL1-1LE Join Date: Aug 2019
Location: CA
Posts: 87
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ZL1 rotors: when to replace
On other cars I've tracked, I replaced the rotors once I saw significant cracks. On my ZL1, I've been surprised how many track days (well over a dozen) I've done w/o seeing any cracked rotors. I am worried though about wear. Do you guys replace your rotors when they are down to a minimum thickness, or do you use some other criteria.
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#2 |
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Sarcasm loading --------
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when they hit the minimum thickness or throb on braking its time to replace.
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"The salesman actually told me to stop getting it sideways during the test drive"
2018 MBM ZL1 1LE - 652 rwhp, 588 rwtq SAE 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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#3 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: 2016 1ss camaro Join Date: Feb 2016
Location: 909
Posts: 10,138
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post up some photos
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#4 |
![]() Drives: 2018 ZL1-1LE Join Date: Aug 2019
Location: CA
Posts: 87
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What is the minimum thickness?
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#5 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,824
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IMHO minimum thickness will not come into play as that is a measurement used when rotors were machined back in the day...rotors are throw away these days. The only thing to be concerned with is severe cracking which extends to the edge and your fingernail can catch. Crazing or checking is OK and expected. The only way you could wear a significant amount of rotor material is to run the pad down to the backing plate and score it metal on metal.
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
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#6 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 13,477
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Here are the rotor specs (option code J6H for the ZL1, J6M for the SS 1LE) for the record anyway.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle Terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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#7 |
![]() Drives: 2018 ZL1-1LE Join Date: Aug 2019
Location: CA
Posts: 87
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So just to confirm, there is no need to replace a rotor unless there is significant cracking or they've been damaged from the backing plate?
That's the criteria I went by when I owned my C5 Z06. |
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#8 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,824
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These ZL1 rotors are way more meaty than a C5 Z06 rotor. Yes, run until cracked or damaged as there is no reason to get crazy with a thickness gauge. I have never been more confident with brake parts/components as I am in a ZL1. If you read the chart above, GM allows for 1.5mm of scoring and 2mm of metal wear which is a ton!
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
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