Cobra Brake Rotors

[marshall_mosty]

When I ran the 13” Cobra setup, I used O’Reilley’s rotors and the would last an average of 3 track DAYS. After going to the floating rotor setup and 4-piston Stoptech setup, the first used set of rotor rings lasted three seasons (and never failed, were just replaced prior to a failure). The “new” set went four seasons before I parted out the car.

[39PitCrew]

When I ran the 13” Cobra setup, I used O’Reilley’s rotors and the would last an average of 3 track DAYS. After going to the floating rotor setup and 4-piston Stoptech setup, the first used set of rotor rings lasted three seasons (and never failed, were just replaced prior to a failure). The “new” set went four seasons before I parted out the car.

Just curious, assume you had brake ducts for both of those configurations.
We have had trouble getting good ducting set up on #39. I think Pranav has
one of the better duct setups for the 4th gens. I know at Hallett good
air flow across the rotors really makes a difference for heat dissipation and
in late race brake modulation, which I would bet is brake fluid temp related
as much as pad/rotor temp.
Thoughts?

[marshall_mosty]

Just curious, assume you had brake ducts for both of those configurations.
We have had trouble getting good ducting set up on #39. I think Pranav has
one of the better duct setups for the 4th gens. I know at Hallett good
air flow across the rotors really makes a difference for heat dissipation and
in late race brake modulation, which I would bet is brake fluid temp related
as much as pad/rotor temp.
Thoughts?

I had the same ducts on both setups. I did run a Carbotech pad on the Cobra setup and PFC01's and Raybestos 47's on the Stoptechs but I wouldn't expect that to change much.

[drecords]

I also used to burn through a set of rotors every 2 weekends when I had stock cobra rotors. Now I have cobra calipers but I upgraded to Craig's old set of 2 piece rotors when he went to AI, 1 set of rings has made it all season (had 2-3 on them when I bought them) and pad wear seems reduced. I have ducts (but not good ones). The pimpy 2 piece rotors do make a difference.

[drecords]

Here's the rotors I have. https://www.girodisc.com/Rotors_c_1048.html

Those with Cobra calipers and good fluid had been a good stop gap to not spending 2400 on the fancy calipers and am not giving up performance over the fancy stuff I don't think.

[ShadowBolt]

Here's the rotors I have. https://www.girodisc.com/Rotors_c_1048.html

Those with Cobra calipers and good fluid had been a good stop gap to not spending 2400 on the fancy calipers and am not giving up performance over the fancy stuff I don't think.

No doubt I don't think the Stoptech's are making anyone win that would not win with the Cobra brakes. I will tell you that once you own Stoptech brakes you will never own a car without them. I bought new rings after four years not because they were worn out but because I was afraid to try anymore. Hell they may have gone another two years.
I looked at purchasing a newly built car (Mustang built to the exact specs as Aarons) that has not raced yet and I really wanted it but the brakes were not Stoptech. I was told "but they are just as good". This one thing made me walk away. Having to add the brakes I wanted put the cost out of reach. I will never own a road race car without Stoptech brakes (or some of the other high end systems). Pads are almost twice as thick and cost half what the Cobra pads cost. Brakes are something I don't ever worry about. I bleed a little fluid (ATE Superblue) out prior to Hallett then never touch it the rest of the season. If a brake duct hose get torn or ripped off we usually don't even worry about it until prep for the next event. I hate the price and I'm not sure they should be legal on a CMC car but it sure is nice to not even think about having brake issues. I think everyone running the $2400.00 brakes will agree.

JJ

[39PitCrew]

Brakes are something I don't ever worry about. I bleed a little fluid (ATE Superblue) out prior to Hallett then never touch it the rest of the season. If a brake duct hose get torn or ripped off we usually don't even worry about it until prep for the next event. I hate the price and I'm not sure they should be legal on a CMC car but it sure is nice to not even think about having brake issues. I think everyone running the $2400.00 brakes will agree.

JJ

Going fast is good ... Stopping reliably is better.
Never, ever want to see this kind of thing at a CMC race ...
https://www.youtube.com/watch?v=-NrtQOP2WFo

[drecords]

No doubt I don't think the Stoptech's are making anyone win that would not win with the Cobra brakes. I will tell you that once you own Stoptech brakes you will never own a car without them. I bought new rings after four years not because they were worn out but because I was afraid to try anymore. Hell they may have gone another two years.
I looked at purchasing a newly built car (Mustang built to the exact specs as Aarons) that has not raced yet and I really wanted it but the brakes were not Stoptech. I was told "but they are just as good". This one thing made me walk away. Having to add the brakes I wanted put the cost out of reach. I will never own a road race car without Stoptech brakes (or some of the other high end systems). Pads are almost twice as thick and cost half what the Cobra pads cost. Brakes are something I don't ever worry about. I bleed a little fluid (ATE Superblue) out prior to Hallett then never touch it the rest of the season. If a brake duct hose get torn or ripped off we usually don't even worry about it until prep for the next event. I hate the price and I'm not sure they should be legal on a CMC car but it sure is nice to not even think about having brake issues. I think everyone running the $2400.00 brakes will agree.

JJ

Not arguing with you Jerry -- I haven't yet gotten the opportunity to experience the StopTech crack so I'm not on the pipe yet. . I did notice a step change in braking consistency with the fancy rotors + RBF660 fluid.

From my experience the key downside to the Cobra setup is rotor consumption, the girodisc rotors fix that and the set I'm ordering a new set of rings for have gone multiple seasons as well. Pad consumption is better with the girodisc + Cobra and ducts -- though not as good as your stoptech life...or maybe I just brake like an old lady :-P.

[centerville]

Here's the rotors I have. https://www.girodisc.com/Rotors_c_1048.html

Those with Cobra calipers and good fluid had been a good stop gap to not spending 2400 on the fancy calipers and am not giving up performance over the fancy stuff I don't think.

This is a no brainer for me. Thanks!

Someone sent me this last year right before I went to cota. Like I did not have enough to think about the first time.
https://www.youtube.com/watch?v=D3ZafJW8Ao0&t=4s

[centerville]

I also used to burn through a set of rotors every 2 weekends when I had stock cobra rotors. Now I have cobra calipers but I upgraded to Craig's old set of 2 piece rotors when he went to AI, 1 set of rings has made it all season (had 2-3 on them when I bought them) and pad wear seems reduced. I have ducts (but not good ones). The pimpy 2 piece rotors do make a difference.

2-3 weekends?