@ALB posted:Reduced unsprung (and bonus-) rotating weight- that's what it's all about!
PS- I have to admit that was the first thing that came to me as well!
I stopped down at my teacher/mentor's shop yesterday to discuss my disc issues yesterday and he brought up an important point: ventilated rotors aren't always a good thing. Pad material depends on a certain temperature to function it's best. In competition, pads/rotors can overheat, glaze the pads, and experience fade. In a street application, in a ~1500lb car, that's nearly impossible. What vented rotors do in that situation is never reach operating temperature, hence never function to their highest potential.
He he also suggested the added weight may actually help stabilize the car at speed, but that remains to be seen. I'm hopeful after our conversation yesterday.
And, FWIW, he speaks from experience. Here's his progress on a 914-6 GT clone he's currently building to endurance race.
