SC brakes or Carrera brakes

[911euro]

is there a difference between an SC brake versus a Carrera brake? If yes how could I tell one from another? I am trying rebuild the front calipers and I would like to know in order to buy the correct parts.
Thanks
Tom

[911euro]

i found our host has a rebuild kit that will work for all 911 from 75-89. I am good. thanks

[emcon5]

You found your answer, but the short version is the calipers are essentially the same but with a spacer between the caliper halves to fit around the wider Carerra rotor. Same size pistons, and same rebuild kit.

[David W]

Correction! The rear calipers on 84-89 are 42mm vs 38mm for SC so the rear rebuild kit is different.

FYI, the 42mm gives more rear brake and is a nice upgrade but I would install prop valve for rear locking concerns. Porsche installed one on all 84 on.

[Porsche 2]

Unless you plan to track your car, the SC brakes are excellent, and "upgrading" to Carrera brakes adds unnecessary unsprung weight.

[Craig_D]

Originally Posted by Porsche 2

Unless you plan to track your car, the SC brakes are excellent, and "upgrading" to Carrera brakes adds unnecessary unsprung weight.

We're talking about a negligible weight difference: spacer width between the caliper halves and wider air gap on the rotors (as far as I know, the rotor material isn't thicker, just the gap between them). I upgraded my SC to Carrera fronts, even though my SC is my daily driver, I do some track days and some spirited drives down mountain passes. Any additional heat dissipation is a good thing.

I'd like to know what the actual weight difference is... Anyone know?

[Craig_D]

I did a quick search on shipping weights for the rotors:

1978 - 1983 SC front rotor = 11.50 lbs

1984 - 1989 Carrera front rotor = 12.05 lbs

So we're looking at .55 lbs difference per side for the rotors. Not much, but I do get that every bit counts with unsprung weight.

I'd still do the swap, just for the additional heat dissipation.

[Bill Douglas]

I would keep the car as original as possible unless there are real benefits gained by changing it.

You could research brake pads that will suit your style of driving and make more noticeable improvements in this way.