Steve in Seattle

I've read the base level C6 rotors are still 12.8" in diameter, however I'm having problems finding their width and offset.

Anyone know if the C6 rotors are interchangeable with C5 rotors? If so us guys with C5 brakes could use the new rotor design (apparently the C6 rotors are 2 pounds heavier, and much more durable).

AZ99FRC

TTT

Good question....anybody know?

Vette_DD

Corvette Museum website says the non-Z51 front rotors are 12.8 in. in dia. and are 1.26 in. thick, while the rear rotors are 12.0 in. in dia. and 1.0 in. thick. The Z51 front rotors are 13.4 in. in dia. and are 1.26 in. thick, while the rear rotors are 13.0 in. in dia. and 1.0 in. thick. No info. about offset.

The special edition of Corvette Quarterly says each Z51 front rotor is 3.74 lb. heavier than in the C5, while each rear rotor is 6.17 lb heavier than in the C5.

snaketr

No the offset on the rotors are different

tcmc5

Just got done looking at the brakes on a Z51 C6 and they look much better than the C5's. To use the rotors, though, you'd also need to get the new calipers, which I am told will bolt up. ABS may be a problem, though, according to another post I saw. The parts guy here said the front calipers were $170ea, which sounds good to me. Don't know about the rotors yet but I heard they weren't bad either.

LTC Z06

They aren't much better, holes are for looks only and the calipers are the same. Now when we can get the C6 Z51 rotors without holes, then that would be a worthy upgrade, but hard core C5 racers have not had problems with the rotors, the calipers are the weak link.

All things being equal an increase in rotor diameter gives a very small break torque advantage.

http://www.stoptech.com/whitepapers/...ons_122701.htm

tcmc5

You may be right about the holes being just for show but I hope not. Just looking at the rotors it seems to me that while they could be mainly cosmetic they should also offer some degree of coolng benefit. I don't know how much heavier the new rotors are but with their increased size/mass they look like they'll dissipate heat more effectively than the C5 units. I couldn't get a real good look at the calipers but they also looked beefier, especially the front. (BTW I agree completely that the caliper is the weak link on the C5. Mine have started flexing badly and need to be replaced.) Whether the C6 brakes actually work better on the track will be the true test. Hopefully we won't have to wait very long to find out.

LTC Z06

I am right about the holes.

http://www.stoptech.com/whitepapers/...ons_122701.htm
For many years most racing rotors were drilled. There were two reasons - the holes gave the "fireband" boundary layer of gasses and particulate matter someplace to go and the edges of the holes gave the pad a better "bite".

Unfortunately the drilled holes also reduced the thermal capacity of the discs and served as very effective "stress raisers" significantly decreasing disc life. Improvements in friction materials have pretty much made the drilled rotor a thing of the past in racing. Most racing rotors currently feature a series of tangential slots or channels that serve the same purpose without the attendant disadvantages.

http://www.baer.com/Support/FAQ.aspx#1
Although crossdrilling and/or slotting will provide a welcome path to expend any gasses when and if they develop, it is primarily a visual enhancement behind today’s often wide-open wheel designs.

AU N EGL

Nope calipers are the same PBR calipers on the C5. The mounting brackets may a bit different to accomidate the larger rotors for the Z51.

tcmc5

They may be made by the same company but they are not the same caliper that's on the C5; similar but not the same. RT article I saw today said they'd stiffened them up, a needed improvement IMHO.