robob

What's SRF?

turbotuner20v

Castrol SRF brake fluid - it has a very high dry and wet boiling point and is the preferred fluid for many who track their cars

turbotuner20v

do you have the full OEM cooling duct system installed on your Z07?

What type of speed differential

thebishman

Did you burnish the CCBs as mentioned in the manual for track purposes? Otherwise I can’t figure out how you managed to get the OEM CCBs to fade like that unless you had air in the lines.

thebishman

For about $14K you are buying true race quality AP Racing brakes that you can put endurance pads on. The OEM CCBs are a great brake, but they aren’t from Brembo’s race division, rather they are a very high performance street brake setup that works well for most ‘weekend warriors’ from Brembo’s regular brake dept. especially if you’re only doing 3-4 weekends/year and you are diligent about changing pads when they’re worn down to no less than 1/3rd thickness; (in order to mitigate high(er) thermal stress to the CCB).

Far better if you’re a track rat to place the APs on F&R; run them until you sell the car when you put the pristine CCBs back on, then sell the APs for about 2/3rds of what you paid for them.

cars

not the rear duct on z07 but has it on z06 with ap. forgot about that

cars

burnished and brake hard until a few laps in. I think pads just suck with heat as I faded rear at sebring real quick thanks to stability control and wrong tires

cars

70th anniversary have full oem cooling duct and full ap. z07 has front but forgot to put rear on. I did overheat 70th anniversary when it had ap front and rear ccb with full duct (wrong tires driving in sports competition mode) at sebring.

speed differential, doing about same top end on both cars. 2r tires running 1.13.2 and 4s tire 1.15.1

robob

Ah, good to know, thanks:-)

X25

The base Z06 iron brakes (J56) are great. If your car comes with them, just upgrade to better rotors and race pads/fluid, and you're done! It used to be cheap to collect J56 parts, but now the price is adding up a bit, especially with the rear e-brake caliper, etc., but it's still quite price effective. I've used J56 on C7 Z51, and my C7 Z06/Z07, and have been happy with the results. I think the braking demands of C7 Z06 and C8 Z06 are somewhat similar...

On my C8 Z51, I ended up installing AP BBKs front and rear, but my main motivation was to use a more compact caliper setup to keep clearances for 18" wheels. All my wheels are 18" up front (18x10.5" in my case since it's narrow body), and 18"x12 or 19"x12 at the rear (you can go wider on Z06, but not too critical). You can do the same on Z06, too (by using 372mm front kit) if you'd like to use 18" wheels up front.

I should note, though, there seems to be less pad taper on AP vs. OEM, which I'm guessing is a result of calipers being stiffer.

noticket

Sorry, were you the driver of both vehicles?

ZRacerLE

I suspected this is the way to go.

cars

yes I drove both vehicles. the turn in is also different, the z07 seems sharper (carbon wheels. 2r) vs z06 with paragon spring oem 4s. yes I am surprised ccb faded so quick in great weather. this is 1.6 mi 10 turn. I think pads have low temp threshold to protect the rotors. one option is getting different pads but probably jeopardize ccb quicker

FF2000

Great feedback. How did your Z06 feel with the Paragon springs? Which ones - the Z07 springs or 10% stiffer? Did the Z06 damping damping feel appropriate for the stiffer springs.

cars

I really didn't track much if at all on the 70th anniversary as I did ap front brakes and paragon spring together. today I tracked both and in my head I was thinking sticky tires on z07. I really can't say much about the dampling. I did notice paragon springs on normal driving is stiffer. I think maybe at sebring I can tell more difference and multiple day runs. today was mainly lap time and brakes. I just installed rear ap brakes yesterday so was happy 0 issues with my own install.

i think paragon only has 1 type of spring.

Poor-sha

What lap times were you running? I ran a low 2:05 in my 4100 lb Cadillac and never faded the CCBs.

Best I’ve seen data for in a C8Z Z07 is a 1:58 with a rolling 1:57 and that driver didn’t report any brake issues.

As an aside, the Caddy and the C8Z seem to have the same VMax in the back straight (~160 MPH).

noticket

he didn’t install the rear break ducts and used stability control. There are plenty of examples of CCBs doing just fine.

LTC Z06

Same on the 911 forums. The track day guys replace their center locks and CC brakes with 5 bolt wheels and iron brakes. Oh, the irony.

cars

What lap time on which track? The track is Florida Internationally Rally Motorsports and red car running low 1:13.2 and white one 1:15.1. The red car is the same car I let grassroot motorsports JG to test in their magazine in which he ran 1:12.99. J.G. Pasterjak has been driving competitively for more than 30 years. The car is capable of even faster but one don't always set PB every track outing. As far as CCB, my porsche friend with 2019 gt3rs is changing to Surface Transform which can be resurfaced. I looked at how beat up my AP brakes on Z06 and I can understand stock Z07 brake fading. I am sure there are tons of z06s in florida and can go run their z06 on 2R and run some 1:13 times for 20 minutes and see if it fade. I will be glad to meet you guys at track to test your own CCB but personally I will be driving my z06 on full ap there for any extended amount of time.

In the magazine test of Z51 by grassroot motorsports, he did 2 sessions, lap time 1:34,1:22.8, 1:29, 1:19.3,1:50.53 and 2nd session 1:29,1:29 and 1:16.13. Basically semi fast and warm up and only 1 time attack laps per session and he had slight fade on stock z51. We are doing 6-10 laps and based on how much brake pad is used up, I would say it eat like 2x more brake pads than Sebring which I am stopping from 145, 120, 140, 135 and 155 per lap in the Z but it has alot more time to cool. I am sure I also use brake alot more than a pro would as amateur like me tend to over brake. I just look at my data, 41 laps on AP brakes on 4s tires and worn out 2 mm on ds3.12. Out of 41 laps, only 21 laps are 1:21 and below so not most are all out. I would imagine on 2R it would wear out faster. Granted AP brake pads are tiny vs z06 pads and m2 pads.

Aku700

LOL, I wonder, maybe this is why I never had rarely any fade issues, because my usual session is 1-2 warm up laps, depending on tire temps, but then I only run about 3-4 hot laps and thats it, i'm done and go back in. Makes me wonder by doing this, it allowed the brakes on my Porsche cars to never get over heated? I mean, when I park, i do have smoke some times coming out of the brake system. When I see guys doing like 10-20 laps, I scratch my head. And the funny part, have you ever noticed, sometimes you go out and you hit all the lines right away and stays that way for those 3-4 hot laps, but when you start out with bad lines, it just stays bad? LOL, then I go back in after like 2 hot laps and reset. But anyway, makes me wonder if this is so much better for the entire braking system?