Quote:
Originally Posted by JeremyD
I tracked a 1974 wide body with 245/315 sticky tires and a Mike Bruns 3.6 - At Sebring - which is tough on brakes = I had 993 or S2 fronts and 964 turbo rears with 930 rear rotors and custom hats/rotors for the 993's to work. Never had an issue over 6-7 years with brakes after that.  |
Very nice car!
The heart of a track oriented brake setup is primarily the rotors and secondarily the supporting structure that keeps the rotor temps down
JJD's setup here has at it's heart 930 rotors, 32x304 front and 28x309 rear, the better the rotors the less support they need. Support is things like cooling, fluid, pads and weight loss
930 calipers on 930 rotors generate 1961/1242 n-M of torque @70bar line pressure
993 on 930 generate 1968/1162
to get get more torque bigger rotors are needed, 993RS 32x322 and 28x322 generate 2306/1618 N-M w/ 993RS calipers, again @70bar line pressure
go crazy and put 997GT3 gen 2 calipers on matching 34x380 and 28x350 rotors and you can generate 3263/2002 N--M
the problem w/ big brake torque is that you need sticky tries and lots of normal force to utilize it
For normal 911s w/ up to ~325 hp and less than ~3k # 930s are going to provide more than sufficient torque and thermal capacity especially w/ good supporting structure