1jester Posted August 26, 2017 Share Posted August 26, 2017 With 39,000 miles on my C7 my rotors are starting to groove. Was told by a mechanic that the material used in C7 pads and rotors is soft and the rotors cannot be turned. Must buy new rotors . Anybody have any input on this? Link to comment Share on other sites More sharing options...
Bromley's Corvettes Posted August 26, 2017 Share Posted August 26, 2017 We just replace the pads and rotors. Link to comment Share on other sites More sharing options...
1jester Posted August 26, 2017 Author Share Posted August 26, 2017 So the rotors can't be turned? Link to comment Share on other sites More sharing options...
Two Fangs Posted August 26, 2017 Share Posted August 26, 2017 Don't know about the whole "soft material" thing, but the rotors do not get turned. The dealer can attempt to refinish them using rotary discs, depending on the depth of the grooves, but it is better to just replace them. Link to comment Share on other sites More sharing options...
HOXXOH Posted August 26, 2017 Share Posted August 26, 2017 Soft cast iron vs hard cast iron. You just need a lathe operator who knows how to deal with an interrupted cut. The average mechanic or parts store clerk isn't a real machinist. Link to comment Share on other sites More sharing options...
TheCMSH Posted August 26, 2017 Share Posted August 26, 2017 To increase performance and fuel economy manufacturers shave every available ounce of the static weight of a modern car, this includes the brake rotors. Used to be they would make the rotors meaty enough to turn them a couple times, thats just added dead weight you drive around with. Seem miniscule? Yes, I don't disagree, but that's the reality of government CAFE standards and manufacturers performance wars Some grooving really isn't that unusual, shouldn't really affect your braking performance. As long as your brakes are wearing evenly I don't think you have that much of an issue, other than the aesthetic Link to comment Share on other sites More sharing options...
TheCMSH Posted August 26, 2017 Share Posted August 26, 2017 6 hours ago, HOXXOH said: Soft cast iron vs hard cast iron. You just need a lathe operator who knows how to deal with an interrupted cut. The average mechanic or parts store clerk isn't a real machinist. And knows how to use a caliper. Couple passes on the brake lathe might take the rotor out of spec Link to comment Share on other sites More sharing options...
Extender32 Posted August 26, 2017 Share Posted August 26, 2017 Heck upgrade to the ZR1 carbon ceramic setup and you'll probably never need to replace your brakes again. Link to comment Share on other sites More sharing options...
1jester Posted August 26, 2017 Author Share Posted August 26, 2017 As there is no C7 ZR 1, with a C6 zr1 brakes fit? Link to comment Share on other sites More sharing options...
HOXXOH Posted August 26, 2017 Share Posted August 26, 2017 5 hours ago, TheCMSH said: To increase performance and fuel economy manufacturers shave every available ounce of the static weight of a modern car, this includes the brake rotors. Used to be they would make the rotors meaty enough to turn them a couple times, thats just added dead weight you drive around with. Seem miniscule? Yes, I don't disagree, but that's the reality of government CAFE standards and manufacturers performance wars Some grooving really isn't that unusual, shouldn't really affect your braking performance. As long as your brakes are wearing evenly I don't think you have that much of an issue, other than the aesthetic The C6 J55 rotors started life at 1.26" thickness and discard is 1.19". C7 rotors start at 1.18" and although I don't find the discard thickness, it's stamped on the outer edge of each rotor. If you measure the current thickness (ideally at the bottom of the grooves) and find it to be greater than 1/2 the difference between new and discard, then turning the rotors just enough to clean up will be a safe bet until your next pad replacement. Link to comment Share on other sites More sharing options...
HOXXOH Posted August 26, 2017 Share Posted August 26, 2017 3 minutes ago, 1jester said: As there is no C7 ZR 1, with a C6 zr1 brakes fit? Nope. totally different animal. However the carbons are available on the C7 Z06. I'd guess if they would fit your '14 spindles, they'd probably cost somewhere around $3-4K to convert. Link to comment Share on other sites More sharing options...
1jester Posted August 26, 2017 Author Share Posted August 26, 2017 Wow, cheaper to trade it in. Just priced Z 51 rotors and pads from dealership and it's 1150 bucks. I guess that's the price of her toys . Link to comment Share on other sites More sharing options...
Desertdawg Posted August 27, 2017 Share Posted August 27, 2017 I don't use the brakes, they last longer that way. Link to comment Share on other sites More sharing options...
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