Please help identify these brakes

[flyingz]

This is a 1978 911sc with steel 930 fenders.
It had been built to look like a 964 with cup 1 wheels and these 993 calipers.
Front rotors are 32mm thick x @ 335 mm diam.
Rear rotors are 28mm thick x @ 300mm diam.

Maybe 993 rotors but I thought hats had to be changed out etc to upgrade rotors etc.

I like them and the way the perform but want to know what I have.
Also want to get wheels and need to know what this may have done to my stock hubs to assist with offsets etc.

Any input would be appreciated.

[Bill Verburg]

Originally Posted by flyingz

This is a 1978 911sc with steel 930 fenders.
It had been built to look like a 964 with cup 1 wheels and these 993 calipers.
Front rotors are 32mm thick x @ 335 mm diam.
Rear rotors are 28mm thick x @ 300mm diam.

Maybe 993 rotors but I thought hats had to be changed out etc to upgrade rotors etc.

I like them and the way the perform but want to know what I have.
Also want to get wheels and need to know what this may have done to my stock hubs to assist with offsets etc.

Any input would be appreciated.

Double check the rotor diameters
the front appears to be 993 Big Red from a 993 tt or RS, the rotors appear to be 993tt with flat 911 hats instead of the high o/s 993 hats, if they are 993 rotors they should be 32x322mm

In back it appears to be 930 28x309mm rotors w/ 964 rear calipers. The confidence level as to the caliper is low as there are several other calipers that look like that, you would need to measure the caliper pistons sizes and throat width to identify them w/ any certainty

[flyingz]

Thank you, I looked up the big red and yes, looks to be. I will measure actual diameters and verify, great info to work from. Looks like I need 17 inch min wheels with these.

[Bill Verburg]

Originally Posted by flyingz

Thank you, I looked up the big red and yes, looks to be. I will measure actual diameters and verify, great info to work from. Looks like I need 17 inch min wheels with these.

I have never used 16s w/ those brakes but have heard that some have

I have those same brakes on the front of my car w/ 17's

here is the font, looks like it's at least possible to get a 16 on there


I use the larger 993RS rear rotors and calipers, 322x28 vs 309x28 for the 930s rear