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Originally Posted by rswannabe
For brakes I decided to go with black 993 calipers over 930 rotors paired with an unboosted 23mm master cylinder. I have this combination on another one of my cars and the braking is phenomenal!
The front rotors can be done either using the stock 911 (narrow body) front hubs and mount the two piece early style 930 rotors and spacers for the wheels or use the later one piece 930 rotors and the later 930 hubs that have an extra 21mm of offset.
The rear brakes use stock 930 rotors which work with the stock hubs. The calipers need to be modified to fit though. First the bolt holes need to be closed up and then redrilled in a narrower spacing (3"). I did this by dilling the exisiting bolt holes to 1/2", threading them to 5/8" and then filling the hole with 5/8" aluminum threaded red held in place with red locktite. I then redrilled the holes to the 3" spacing needed for the stock 911 hubs.
The stock 993 rear rotors are only 24mm wide, so you also have to open up the throat of the caliper by grinding out a few of the choke points to allow clearance of the 28mm wide 930 rotors. This is pretty easily accomplished with a rotary file.
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I have a question? When you said you filled the break holes, did you do that by welding? It looks like some other way was used. How did you do the filling?