help with odd size caliper?

[wdawson]

have a 993 race car with mismatched rear calipers (pistons are different sizes side-to-side.) would like to find a mate for the one with the larger pistons but i dont know what car these came off of. anyone an expert in this area?

calipers are the big red shells with ear mounts. pistons are 30mm and 36mm. is that enough info?

thanks for help, bill.

[Bill Verburg]

is that enough info?

probably

there are only 2 largish(though not big red large) rear 993 calipers.

one is the 993RS 30/36, the other is the 993tt 28/28, I have seen references to a 28/30 that may have been used on 993 C4S, but I've never seen one



all use the same pad as a n/a 993 front caliper

the Big Red pad & caliper is ~10mm taller, in this pic you can see back to front 993RS(aka big Red), 993RS rear(aka993 front), 993 rear


As long as you have an effective 40/65 lsd, I would prefer the 30/36 over the 28/28

[wdawson]

wow bill you have the info AND pictures! very impressive....

yes the pads i am using look like the yellow ones in your pics. now all i have to do is find a 993rs caliper. know where i can buy one?

thanks, bill

[Bill Verburg]

you'd have to check through the dealer channels
993.352.425.80 /L
993.352.426.80 /R

Pelican lists them @ $591.25ea

[wdawson]

bill,

porsche tech data on the part nos you sent me list 34/36mm pistons not 30/36. still need help. can we discuss this by phone? you can call me at 858-586-9036 or send me a number and i will call.

thanks, bill

[Bill Verburg]

Originally Posted by wdawson

bill,

porsche tech data on the part nos you sent me list 34/36mm pistons not 30/36. still need help. can we discuss this by phone? you can call me at 858-586-9036 or send me a number and i will call.

thanks, bill

I don't know who or what "porsche tech data" is but I have those rear calipers on both my 911 & 993, they are 30/36

[wdawson]

just to close the loop, bill. i did order the caliper with the part no. you supplied and, as you said, it was the correct one. sorry to have doubted you. many thanks.

used it to good affect this past weekend at the poc fontana race. won both red races. did i mention it was hot? 112 on friday.

bill