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Kalun D · 10-28-04, 04:06 AM

A couple of other things to consider when it comes to GT40 replica brakes are:

The clearance between the outside of the caliper and the wheel center, outboard clearance as opposed to radial clearance. With 4 piston calipers this comes very close especially with the Team III wheel.

Another is functional brake cooling ducts. Quite a few of the kits don't have them or it's just an option. Can you gain just as much by spending money/time on a cooling system and save on rotational/unsprung weight?

One other thing is diameter. The original cars won lemans with speeds over 200mph with 11" rotors front and rear. 13" may be overkill especially on the rear, unless it's full out racing. An 11" rotor will lock up the wheels, larger sizes only increase endurance for more continuous braking through greater heat dissapation. How much endurance do you need?

A typical Indy car will run from 12"x 1-1/4" to 14"x 1-1/2" depending on the track, and Winston cup is around 12-1/2 because of 15" wheels and that's a 3,000 lbs car.

10-28-04, 04:06 AM	#15 (permalink)
Kalun D Kalun_D 6 Tenths Join Date: Dec 2003 Location: Seattle GT40: Scratch build Posts: 639 Rep Power: 12	Re: Rotors, calipers and wheels A couple of other things to consider when it comes to GT40 replica brakes are: The clearance between the outside of the caliper and the wheel center, outboard clearance as opposed to radial clearance. With 4 piston calipers this comes very close especially with the Team III wheel. Another is functional brake cooling ducts. Quite a few of the kits don't have them or it's just an option. Can you gain just as much by spending money/time on a cooling system and save on rotational/unsprung weight? One other thing is diameter. The original cars won lemans with speeds over 200mph with 11" rotors front and rear. 13" may be overkill especially on the rear, unless it's full out racing. An 11" rotor will lock up the wheels, larger sizes only increase endurance for more continuous braking through greater heat dissapation. How much endurance do you need? A typical Indy car will run from 12"x 1-1/4" to 14"x 1-1/2" depending on the track, and Winston cup is around 12-1/2 because of 15" wheels and that's a 3,000 lbs car.