Timz06

On another thread discussing all of the parts required to convert c5 brakes to ZR1, I commented that I didn't think the bigger ZR1 brakes would improve the braking distance, but would improve longevity, etc.

Just for fun I pulled out some old magazines;

Corvette ZR1 60-0 RT 6/10 112
Corvette Z06 2001 60-0 MT 11/00 111

So in stock form, the ZR1 stopped no faster than a 2001!

Rednels

I would think that as expensive as they are its a waste of money. I have talked to some Porsche guys that have them and they hate them on the track.

MR Turco

Not really apples to apples. Isnt the ZR1 at least a 100+lbs heavier? You also need to account for brake fade, which is the real advantage over larger brakes. Also rotating mass is much lighter on the ZR1 than the Z06 brakes.

That doesn't even account for the ballAr factor

AU N EGL

Carbon brakes are to reduce rotating weight and logicality of equipment. Not stop harder. Thee carbon rotors are not the F1 rotors and pads. I think buy not sure the ZR1 rotors and pads are made by Brembo / Honeywelll in the Honeywell carbon plant in southern Indiana

They can stop the car really hard and fast IF they are properly bedded in. When the ZR1 brake pads are bedded in properly they turn from gray to gray/white color. They they stop very well.

A few years ago at Road America we had a C6Z06 with StopTech Brakes DTC-70 pads on Hoosier Rs chasing a Stock ZR1.

The ZR1 would out accelerate the Z06 out of the corner, but the Z06 would real the ZR1 back in the brake zone.

drivinhard

200+

jvp

Along with the non-run-flats on the Z06 vs. ZR1. Tire compound and compliance are going to play a role in stopping distances as well.

jas

Timz06

Not quite a fair comparison, but looking from my data I stopped just as quickly with my c5 brakes as I do with the new AP brakes. However after 1 track weekend, the AP brakes look just like they did at the beginning of the weekend.

95jersey

For track day folks, I have always said the OEM brakes work great, the only reason to change is to use a cheaper pad. The OEM Z pads were like $350+ for just the front axle and only last 2-3 days. I now have a Wilwood BBK and the pads cost me $110-$140 and last many days. I figure 2 seasons and you have your money back and then some.

Once your track day hobby stops being a once in a while thing, and becomes a full time sport year after year, you need to start making decisions or you just throw money out the window. Go figure, I spend money on a BBK and then choose to take a break in the sport right after I installed my BBK...

Everett Ogilvie

A one-time stop, like for a magazine test, or even 4 or 5 stops, reveals nothing about the long term heat capacity of a brake system. The tires are the ultimate limiter of any car for maximum stopping power, so the differences between calipers and rotors don't really come into play for a single stop test as long as there is enough brake torque to lock up the wheels, and good enough modulation to just avoid lockup. The real test is repeated extreme braking during a race heat or a track session and that's where the design wins in a brake system will show up as no pedal fade with the last stop as good as the first. I am still in the camp that the ZR1 brakes are light and pretty good, but they are not extreme race parts. RACING carbon ceramic brake systems are more than $15K per wheel and probably only found on prototype classes and above (at least I am not aware of any carbon ceramic sytems currently in use in Touring or GT racing classes).

I spoke too soon - from the DTM website (German Touring Car Series);

"Brakes
The carbon-fibre brakes and the brake pads as well as the brake callipers for all the teams are supplied by one manufacturer (AP). During a season, two drivers have to share six sets of brake discs for the front axles and six for the rear. "

I would be very interested in the cost of the brake system used in this series OVER AN ENTIRE SEASON (12 SETS OF ROTORS.....)

63Corvette

I concur!!! Brakes stop the wheel...........TIRES stop the car

RC000E

I pounded on a ZR1 at Monticello and those brakes don't quit. It's more about unsprung weight, rotating mass and longevity under extreme abuse and temperatures. Stopping your car hard at the stop sign with each setup isn't gonna reveal a thing. Also, like was stated above, you can only stop as quickly as your tires allow, and at the same time the more grip, the harder the brakes work.

topmover

I cant speak stock to stock however my 504rwhp c5z05 with upgraded pads vs. my my 2010 zr1 there is no comparison in 'duration" stopping........... the Zr1 is far superior.
However my ZR1 pads after 10 track days of experiance on stock tires last no longer than my carbotechs on nitto 555r2's. Plus the bedding process is a pain on the zr1.

Timz06

My guess is that stock brakes with good pads will do just as well for a 30 minute race.

Here is a graph from traqmate (Check seg 9 braking for 10a from 150 mph) the blue are my ap brakes with DTC 60 pads and scrub hoosier R100's. The red are a couple of laps from a 30 min race with new A6's and stock brakes with DTC70.

I bought the AP's for longevity and lack of maintenance, but in a 30 min race, the stockers do well with new fluid and pads.

http://timz06.com/tmate/rabrake.pdf

Tim

Bill Dearborn

Some number of years ago I used a Vericom Performance Computer mounted on the windshield to determine how long it would take to slow my 86 Vette with stock 12 inch brakes and stock pads and BFG R1 tires. I ran the test two directions on the same road to compensate for any level changes. Both tests showed a 60 to 0 distance of 100 ft. Those same brakes wouldn't last 3 laps around Watkins Glen before the pads and rotors got so hot they wouldn't stop the car. It isn't about stopping once it is about stopping many times over a short time period.

Bill

snapsZ06

. It isn't about stopping once it is about stopping many times over a short time period.

Bill


having run my 08 z06 many times on the road course the first few laps are not the issue its the last 15-20 min of a 30 min session that stock set-ups even with great racing pads and race brake fluid that they just dont stop the car and will faid to almost no brakes...... major factor in selling the car and moving up to the ZR1

AU N EGL

Once I switched to Castol SRF, never had problems with brake fade as I did with ATE at the end of a session.

with the ZR1 do have put on the brakes sooner, but then again am gong 20 mph faster too.