930 brake caliper & rotor weights
 

I've searched through various forums and there doesn't quite seem to be a consensus on the actual weights of the front and rear calipers used on the 930.

Caliper weights without pads:

A-type aluminum front ('76-'77 930 Turbo) : 9 lbs 8 oz (9.5 lbs)
M-type cast iron rear ('76-'77 930 Turbo) : 6 lbs 12 oz (6.75 lbs)
917-style aluminum front ('78-'80 930 Turbo) : 8 lbs 6 oz (8.38 lbs)
917-style aluminum rear ('78-'80 930 Turbo) : 8 lbs 5 oz (8.31 lbs

Is this what other people have concluded as the caliper weights as well?

Rotor weights have a bit more variance:

A-type front ('76-'77 930 Turbo) : 9 lbs 8 oz (9.5 lbs)
M-type rear ('76-'77 930 Turbo) : 9 lbs 8 oz (9.5 lbs)
917-style front ('78-'80 930 Turbo) : 13 lbs 3 oz (13.2 lbs)
917-style rear ('78-'80 930 Turbo) : 17 lbs 3 oz (17.25 lbs)

Sources:

http://forums.pelicanparts.com/porsche-autocross-track-racing/754560-930-front-brakes-m-rear-caliper.html#post7525480

Brakes