Brake ID Please

[JJ 911SC]

The car is a 1983 SC but was upgraded to a 3.2 and wide body rear end among other things.

The Disk diameter are 113/8" and the remaining thikness is 13/16".

The caliper are mark as follow:

Driver side: ??? P 81





Passenger Side: ??? P 82




Are these original SC or Carrera upgrade?

I left the wheels off so I could check for more marking if requires.

Cheers

J.J.

[Steve@Rennsport]

Looks and sounds like stock SC calipers & rotors.

[JJ 911SC]

Hi Steve

Until I do the Turbo look upgrade, I bought all the parts to change the lines and re-furbished the calibers (I'm pulling on the right side under braking).

Having a cross over car (aka Frankenstein) I check the CATs and if I'm not mistaking the front are the same for the SC & Carrera but the rear are different.

So if they are SC, I got the proper kit.

Thanks

J.J.

[Steve@Rennsport]

JJ,

Front SC and Carrera calipers have the same size pistons; only the widths are different due to rotor thicknesses (20mm vs 24mm).

Rear Carrera calipers have bigger pistons and the same thickness rotors (24mm) as the fronts.

[JJ 911SC]

Hi Steve

From my thickness measurement, using a dialed caliper, I got 20.6375mm (13/16) left which is thicker than new SC Rotor thickness (20mm) and they got at least 3500 miles on them.

Is it possible to use Carrera rotor with SC Caliper?

J.J.

[johnsjmc]

No. The Carrera rotor is 24 mm thick