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914World.com _ 914World Garage _ What type of 911 caliper? I believe they are "A" calipers

Posted by: wallys914 Jun 6 2010, 09:39 PM

I swapped to a 911 brake setup and never attempted to look at the part number on the caliper, now I want to purchase pads for it, and since the car is on jack stands in the rear with the engine hanging I can't lift the front and pull off the front wheels.

I can see a 233 on the outside of one and 290 on the other caliper, a 30 on the inside of one? I have no idea what these mean? Where is a part number on the calipers?

I will post pics in a few...

Posted by: wallys914 Jun 6 2010, 09:50 PM

I see what I think is the stamp ATC or ATS or ATZ? can't quite tell...

IPB Image

Posted by: Eric_Shea Jun 6 2010, 09:58 PM

I think it says ATE. None of that numbers stuff means anything, just casting numbers etc.

Here's how you can tell:

* M9 Fasteners with a Ribe R6 head and "14mm Nuts" = A-Caliper
* Fluid Inlet at the base of a widow's peak in the back = A-Caliper
* The heaviest caliper ATE ever made for a 911 = A-Caliper

* M8 Fasteners with a Ribe R8 head and 13mm nuts = M-Caliper
* Fluid Inlet on the side with a banjo fitting = M-Caliper (if it has the13mm nuts)

A-Calipers take AP45 Pads (from Porterfield)
M-Calipers take AP31 Pads

Posted by: Eric_Shea Jun 6 2010, 09:59 PM

Ahh... more pictures showed up while I was typing.

A-Calipers.

Porterfield AP45's

Posted by: wallys914 Jun 6 2010, 10:01 PM

You duh MAN!

Thanks,

Posted by: Eric_Shea Jun 6 2010, 10:07 PM

Let me know what pads you need!