Danny318

Hi all. Got a new 07 z51 coupe. I had it on the track (NHIS) the other day and it was pretty good, but I am getting some fade and such. Everything is stock except I rigged up some z06 brake ducts.

Now, I will change the fluid to Motul 600, which should help in some areas.

Also, for rotors I dont see many options. There are some on ebay for z51 that are only slotted, not drilled, and I was thinking about getting them, they are like 220ish shipped for the front.
What are yall using for rotors?

For pads, I have no idea. someone at the track w/ c6 was using Carbotech pads and he liked them and they did not seem to fade.
What do yall use/recommend?
I dont want something super all out extreme with pounds of dust etc, but something that wont fade and will work good at high speed tracks.

I had my camber settings done, I'm at -1.6 in the front and -1.2 in the rear, I think. toe is about 0 I think. If anything it seems like a bit too much camber, but the car did handle very well.
What do you all run for camber?

Ok, that is about it. If you post some pad/rotor/etc, please tell me where I can get it.

Thanks

gkmccready

On my '06 Z51:

• Motul 600RBF
• C5/C6 base caliper brackets and $25ea NAPA rotors
  • The part number on the caliper brackets (abutments) are 12455800 and 12455799. You'll need to order 2 of each.
• PFC 01 brake pads
• DRM Brake Ducts (prior to Pfadt swaybars)

Change your pads before and after the event; you could do rotors, too, if you like. Spindle ducts and some hose between the brake ducts and spindle ducts reportedly helps, too.

If you're at NHIS that means you're probably close to Gary Hoffman (HardbarUSA). I think he prefers the Wilwood brake fluid and Wilwood H pads -- he'll be an excellent C6 resource for you with his harness bars, harness mounts, seat mounts, camber plate & stud kit, etc, etc.

FWIW, I did my first three events in the C6 on the stock tires with my alignment -1.1f, -0.9r and things wore reasonably well...

Leo z51

Does anyone use the stock c5zo6 rotors ? if so, do you use the c5z caliper bracket, and thats it?

gkmccready

See comment #2 for the caliper bracket part numbers... see your local NAPA for C5 rotors...

willhaveC6

NAPA shows different part numbers for base C6 and base C5 rotors... with the C6 rotors costing about $40 more each...

While I have the C5 rotors and the base C6 brake brackets for my '07 C6 Z51, I haven't put them on yet, I have to ask... if the base C5 rotor equals (e.g. fits base C6) why the different part numbers and prices from NAPA for the respective rotors??? Inquiring minds want to know...

I have the beginnings of cracking on my drilled rotors after three HPDE days and see the slippery slope of consuming rotors like fluid and pads if I continue doing HPDEs...

bobmoore2

Your "beginnings of cracks" are probably nothing to worry about. We call that heat checking and we all get them. Just keep an eye on the cracks and be prepared to replace the rotors (have a ready spare) if the cracks get too big. However, once you've worn out this set of rotors, you should get a set of the cheap NAPA rotors without holes or slots. They'll last much longer, give you nearly identical performance, and have a much smaller impact on your budget. The slots and especially the holes weaken the rotors making them more susceptible to serious cracking.

Aren't the C6 Z51 rotors a larger diameter than the C5 Z51's? I think I heard that the main reason the C6 has an 18" front wheel was to allow a larger brake rotor to fit within the wheel. If so, then the C5 Z51 rotors are definitely not compatible replacements.

Bob

Leo z51

Well, I asked about c5zo6 rotors, because thats what I heard someone was using. Everything in this thread is talking about BASE model rotors. The base model is 12.8, the z51 are 13.4, which is why you need to change brackets. I thought the c5z ones are more like 13.0, so they would need a different bracket too.

seems kind of like a waste to drop down to 12.8 from 13.4, but there are not many options...

gkmccready

I don't know what your local NAPA is saying. The base C6 and all the C5 rotors are the same so far as I know. I order '02 Corvette rotors locally for those brackets.

Leo z51

are they 12.8in? do they really work fine? .6in is a lot when it comes to braking, isnt it?

Leo z51

C5/C6 base caliper brackets and $25ea NAPA rotors
The part number on the caliper brackets (abutments) are 12455800 and 12455799. You'll need to order 2 of each.

Wait, why would I need 2 of each? are the brackets not one piece, and you need two of the pieces to make one bracket, or do I need 2 brackets for each side?

gkmccready

I listed front and rear brackets. If you order through Gene@GMPartsHouse he'll set you up. I've only run the smaller rotors on the track, and lately the street, and they've worked perfectly fine.

Leo z51

oh OK, I get it now. how much do the brackets cost, roughly?

willhaveC6

This is from the NAPA website.
BASE 2007 C6
Brake Rotor Only - Front UP 880253 $76.99

Except Heavy Duty Brakes 12.80" Diameter

Brake Rotor Only - Rear UP 880252 $73.49

Except Heavy Duty Brakes 12.02" Diameter

BASE 2004 C5

Brake Rotor Only - Left Front NB 4886701 $39.89

Brake Rotor Only - Right Front NB 4886700 $39.89

This is what I found on the NAPA website and the reason I asked my question about Base C5 and C6 compatibility. I have already purchased Base C6 brackets for my Z51 07. And have purchase the BASE C5 rotors --- but I have not tried to put them on. I am just trying to understand why NAPA has two different part numbers with different prices for the rotors which everyone seems to say are the same thing. That is. BASE C5 rotors equal BASE C6 rotors. NAPA suggest otherwise.

I guess it could be as simple as NAPA being smart and taking the Corvette tax to a new level by making it a C6 Corvette Tax.

Simon C

Hey guys,

Some notes on my C6 brake experience FWIW.

I have the C5 Rotors (Napa 12.8inch) with the retro caliper brackets as mentioned above. I also run Toyo RA1s with 275s in front and 305s in the back on CCW Corsairs. DOT 4 ATE Typ 200 Fluid, stainless lines.

I ran Hawk HPS pads with these rotors initially at Watkins Glen Last year but they suffered terrible break fade and got too hot.

I upgraded to Carbotech XP12 in Front and XP10 in the rear and these have worked much better. I had approximately 4-5 HPDE days on these before I put brake ducts on 2 weeks ago. I went to Watkins Glen with 1/3 pad left this week and they ran down to within 1 mm of the backing plate in 1 1/2 days. Now the brakes didn't really fade that much but I could definetly use more stopping power and brake later...

For reference, speeds indicated at the point which testicular prudence intervened.
Turn 1 - 125Mph
Bus Stop -143Mph
Heel 8 - 120ish

There was a guy with a Z06 with stoptech brakes on the front, stock on the rear and he mentioned 170 at the bus stop..

Now what is interesting is that coming in from a hot session my rotor temp (measured with an infrared laser tool) was in the 600 - 625 degree range while the Z06 with the stoptech (Slotted 14inchers - 6 piston) was only about 500 degrees. (BTW his stock REAR Z06 cross drilled rotors cracked). Perhaps part of the temp disparity is the Pad thickness but his pads were about 3-4 MM but 100 + degrees seems a lot.. Also don't know what kind of pads he had. sorry.

I am going to try a different pad after the next set of Carbotechs are finished to see what that does with heat generation. It seems that a BBK (14inch rotor) may be the best way to go but I would really like it to fit those under the stock wheels... Stoptech and Brembo don't fit.... Calls in to Wilwood...more to follow. Anyone have the 6 piston wilwood with stock wheels?



Regards

S.

ghoffman

I am VERY familar with NHIS, having run there for 16 years! We just did a Wilwood setup for a C6-Z51 and it is all about wheel clearance. You have many options, please give me a call to discuss your options.
Gary Hoffman
Hardbarusa.com
603-682-8073

Danny318

Simon, definatly try some Motul 600 or Super Blue racing brake fluid next time. It is good for 600 degrees, maybe the fluid you were using was getting too hot at the Glen and thats why your brakes got weaker..

gkmccready

http://www.gmpartshouse.com/ and plug in the part numbers. I seem to recall them being about $35 a piece.

Oyishdog

I forgot what I paid, but I still have a brand new full set sitting in the garage...I had the same intentions to convert my c6 z51 down to the c6/c5 size. I have no need for them now and can sell them to ya.

Danny318

Can somebody please clear up what rotor exactly we are talking about here? Is it base model rotor, z51 rotor, or z06 rotor, from C5??

Some people say zo6 some say base model...

Which is it that is 12.8in, and which is it that will fit with those brackets listed in this thread?

Danny318

Are the Base c6 and zo6 C5 rotors the exact same, by any chance?