Quote:
Originally Posted by r lane
Great info fellows. I actually have a set of front big reds. they need repair as in needing sleeves. Who can do that repair. That is the direction into which I think I will head. Then source a set of rear 993 RS or facsimile. Will install a dual master cylinder setup as well. My narrow car weighs 2450lbs with a half tank of gas and no driver, which is probably what it weighed when it arrived here from Deuseldorf in 1978. You remove front and back seats, carpet, swap metal bumpers, sunroof panel and rear lid for fiberglass, add a cage, heavy rear turbo arms, front suspension brace, fuel cell cage and it is a wash. The new car I assume will be about the same. Don;t know how you guys get them down to 2000lbs withour replacing fenders, doors and roof.
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Modifying the 993RS calipers for use on a 911 is not trivial, same for the rotors
These are stock 993 tt and RS calipers, tt on left, RS on right. The only difference is the piston sizes, tt are 28/28, RS are 30/36
From left stock 993RS rear, axial mount, 993RS rear modified for 911 rear use, radial mount after machining w/ a caliper adaptor, stock 993RS/tt front, axial mount
This is a 993 RS/tt rear rotor modified for use on a 911. The whole center 993 section is cut out and a 911 center pinned in, in essence a 2 piece assembly as used in front, this retains the parking brake
A possible alternative that I haven't tried but see no reason it wouldn't work is to uses a stock 930 309x28 rear rotor and a front 993 caliper. The front regular 993 caliper though black is the same as the rear 993 RS caliper but is axial mount stock. Just have the 36/44 pistons sleeved down to 30/34 or 30/36, I've had White Post Restorations sleeve down other alloy calipers though not that much.
An other alternative that I have used is is a regular 30/34 993 rear caliper on a 930 rear rotor. Some pretty easy mods make this possible
Here is a stock 964/993 rear caliper, 964 version is 28/30, 993 version is 30/34 there are also some small visual differences. Just plug the stock axial mount holes and redrilled to accommodate the 930 rotor and slightly clearance the throat are. Both have been done to this one
another better rear alternative is a 964 t rear caliper( these are available in red and black, pistons are 30/34 the caliper is a wider version of the 993 rear so only the axial mount mod is necessary.