What about 993 Rear Calipers on 3.2 Front Rotors?

[KTL]

S calipers have been said to flex under heavy loads.

When the question was posed if S calipers were better than Carrera A's, the answer was no because, 1. You use a thinner rotor on the S compared to the Carrera A, 2. The S caliper has been known to flex under heavy loads. The advantage to the S is lighter unsprung weight, but is it enough to overcome the added heat sink of the Carrera rotors? Probably not?

Returning to the class issue. At tech. inspection, how many would notice the difference between the SC assembly and the Carrera assembly? Does the difference stand out that much or would it most likely go unnoticed? Just curious.

[Bill Verburg]

BK911,
If you use the '84-89 Carrera calipers f/r then the correct brake bias will be upset(too much rear brake) , the m/c is not the issue as the Carrera boosted cyl. at 20.6mm is only a little larger than your oem 19mm one. The factory used a 33bar p/v on the rear circuit. You can avoid that issue by sticking with your stock 20mm rotors and M calipers in the back. This will preserve the correct bias as the Carrera calipers for 24mm rotors and the earlier A calipers as used on SCs etc. all have the same pistons and pad area.

The factory stopped using the aluminum S caliper when it was noted that there was as much or more weight savings from using a different brand of tire. The S caliper does flex more than an A. Whether or not the S or A, 20mm or 24mm or whatever is better is a decision that each owner needs to make based on his own use. If fluid is boiling, pads glazing etc then you need better cooling, different pads, insulators and or bigger rotors or as some have pointed out learn to conserve your brakes better. If the above is not an issue than no you don't need bigger brakes. You make your decision and if it's right fine otherwise you do something else. Yes, you need to know the rules for you class.

As an aside the "little reds " referred to earlier were just painted A and M calipers.

[Don Wohlfarth]

Very well said Bill V.
Ax'ers call inspection a "tech" inspection but it is more of a safety inspection. The inspector checks for loose lugnuts, cracked wheels, corded tires, loose wheel bearings, no gas, oil, water leaks, all the beer cans and bowling balls have been removed, and that a car will stop in a straight line under heavy braking from about 30 mph. The tech inspector is not responsible for car classification.

[Joeaksa]

Olivier,

I have an extra set of front Carrera calipers. Am in the process of overhauling them now and hope to have them on the car in a month or so with new rotors.

After this is completed the ones that are on the car now will be available. If you are interested, pls email me. No idea on the price just yet...

JoeA