yes i can, but my english speaking/writting doesn't allow it
i try:
these calipers were design for small disc (+- 300 mm): old porsche were fitted with small size disc (they were big for the beginning of the 90's), but large disc (32 mm for some), till the 996. After this porsche has just increase the size of the disc but with the reduction of the thickness, except for the big red's.
In fact, the radius of the calipers is design just for the diameter of the disc.....so i'm not sure that old design (humm.... calipers made for 300 mm discs) calipers will fit 345 mm disc (I'm pretty sure of that).
I had on my old M3 E30, standard 993 calipers (made for 300 mm) fitted with 322 mm disc, and it was okay.....but it was the max diameter possible with these calipers, and i had to modify the fittings of the pad to fit correctly the pads onto the disc....it is just a question of radius of the casting of the calipers.
look at this picture (my M3 E30), and look at the small gap allowed by this combination, and the position of the pad:
so imagine this with 20 mm more !
the 993 standard calipers have the same size of pistons as the big reds 996, so they are a good choice for small size discs (up to 320 mm).
you can fit standard 996 calipers on 320/330 mm disc, but the size of the pistons is smaller than big reds and 993.
I think you have to find big reds, just because of the diameter of the discs you want to use.....and not because of the size of the pistons !
if you want, i have nearly new 996 turbo big reds eventually for sell....came from my cossie i sold:
