zero9nine

Are the RS America brake Calipers, Front and Rear, different from a standard C2?

If so, do they match the Calipers on a Turbo or maybe a 993?

Thanks in advance

Thanks
John

J richard

zero9nine

J richard

JasonAndreas

Yes, there was a model year changes for the C2 front calipers in MY91 and for the rears in MY91 and again with MY92.

Bill Verburg

The RSA used the same 4 piston 36/40 calipers(98mm pads) on 298 x28mm rotors front and & 4 piston 28/30 calipers(98mm pads same as front) on 299x24mm rotors rear as all other n/a non RS/non Speedster) '93-94 964s

The only change I know for the basic 964 C2 or C4 was the change from 2x44mm piston rear caliper w/ 63.8mmmm pads to the 4 piston mentioned above

RS used 36/44mm caliper w/ larger pads(132 vs 98mm) on 322xx32mm rotors front 30/34mm caliper on 299x24mm rotors rear.
Turbo used the same front as the RS but the rear was 28x299mm rotor w/ 30/34mm pistons(98mm pads)

cscrogham

^lol every time I see a response from Bill he has all the stats!

cobalt

Three very knowledgeable people responded although Bill is the stats man.

There are cosmetic changes to the caliper from early to late and the RSA uses the caliper without the cast raised lettering.

Bill Verburg

That's not true
here is a stock RSA rear


There was a change in the seal design early on, I don't believe that any 964 were affected by that but it is possible that some '89s got the old design, nothing that affects RSA though

JasonAndreas

Here is a late 92 build RSA rear brake caliper without raised lettering.

cobalt

Bill,

The caliper you posted has the lettering painted vs raised as I pointed out. Although the font is the older style. The early calipers have the PORSCHE lettering cast in place and then the face was sanded down after paint and then cleared. I have never seen a 964 after 1991 with the cast raised lettering unless it was replaced with an older unit.

Bill Verburg

Sorry, I misread, thought you were saying the raised bars ala the smooth 993 calipers

cobalt

No problem I could have been more clear in my explanation

zero9nine

Thanks for the info everyone.
I have a follow-up question.
How do I tell the difference between a pair of Front 964 (RSA) calipers, and a pair of rear calipers?
Are they very similar if not identical in shape and size?

Thanks
JOhn

JasonAndreas

Besides the casting numbers on the caliper body, the pistons on the front are larger.