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In the following video posted by another RL'er https://rennlist.com/forums/991/1045...new-video.html - it appears that the caliper pistons, no longer have pucks. Seals are also different. Has this been adopted in the .2's or is this a future developmental change. Here is the picture that is in the video:
Looking at the PET, the seals on the .1 and .2 GT3’s are the same part number. The calipers have a different minor version number. Pucks have never been available from Porsche . My guess would be the video is for the non GT cars if it’s a current production product. Maybe somebody that has pulled apart they brakes on a .2 can comment.
The 991.2 GT3's are still using the same calipers as the 991.1s and with them ceramic pucks. However, they have made a minute change to the actual puck design as they did from 997 to 991. In an attempt to help prevent initial cracking/chipping, they sacrificed a larger contact area for more tapered edge with a smaller contact area. As these cars have only been out for a very short time, no 991.2 has had much track use to cause a failure yet. That being said, it is conclusive by the failure rate on the 997s and 991s that the ceramic pucks have a propensity to fail on these cars regardless of the design. We will continue installing our titanium piston puck replacements as a preemptive measure on the 991.2s we have coming through the shop. Time will tell as these cars see more and more track time how the new design fairs.
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Photos Below Compare 991.1 and 991.2 Piston Pucks Front and Rear
01-28-2018, 10:27 AM
Has Porsche Changed the Puck Design?
