brentil said:
The thing is bigger brakes and calipers do not necessarily mean better stopping power (yes they could help with repetitive stopping with better heat dissipation and such). You're better of spending money on better tires then you are some sort of big brake kit....
:agree:
High performance tyres are a precondition to get short brake distances. But if you compare new cars, all automobil testers use the tyres which are delivered from the manufacturer (RSA all season for the Sky and F1 GS2 for the RL).
I just read a test between BMW Z4 3.0 and Porsche Boxter 2.7:
BMW brake distance 100 km/h > 0 - 37,6m (123 ft) cold, 36,5 m (120 ft) warm
Porsche brake distance 100 km/h > 0 - 35,5m (116 ft) cold, 35 m (115 ft) warm
BMW tyres: Bridgestone Potenza 225/45 R 17 W
Porsche tyres: Michelin Pilot Sport 235/265/40 ZR 18 Y
I don't think that bigger rotors/calipers are necessary as long as the brake distances are round about 125 ft or better down from 100 km/h (62 mls/h) because a high speed car must have a high performance brake.
If I compare with my 1992 Opel Calibra Turbo (max speed 245 km/h - 152 mls/h) it had a brake performance with the 1992 Firestone tyres 205/50 ZR 16 lower 130 ft (cold 38,6 m / 127 ft, warm 39 m / 128 ft) out of 100 km/h. That was really good at that time - and the same as a new S2000.
Rotors front 284 mm / 11,2" , rear 270 mm / 10,6" and a 4-channel independent ABS (Anti-lock). For normal drivers that was ok, for racing you had to improve the venting and/or use bigger rotors because of heating up in hard and often braking. Weight of the car 3000 lbs, nearly equal to the Sky.
A new high speed car should be a bit better then 14 years ago :thumbs: