60mm brake variations

Discussion of 4-Cam Type 547 engines (and all the Fuhrmann racing variants) and cars that powered them.
Don Ahearn
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Posts: 78
Joined: Sat Sep 20, 2008 10:25 pm

Re: 60mm brake variations

#16 Post by Don Ahearn » Sun Nov 21, 2021 2:28 pm

Richard you are exactly right. On the big brake S90 I am restoring the whole car was basically worn out yet the original 60 mm brakes had plenty of material left. I guess the philosophy was to build these cars with a higher brake to weight ratio!

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Harlan Halsey
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Joined: Fri Mar 02, 2012 2:05 pm
Location: No Cal SF Peninsula

Re: 60mm brake variations

#17 Post by Harlan Halsey » Mon Nov 22, 2021 6:20 am

Porsche drum brakes are good, that is why Porsche continued to improve them-magnesium backing plates-long after everyone else had gone to disks. But on the heavier 356A Carrera GT, at Laguna Seca they aren't up to the task. The problem is that the end of the straight is down hill into a 2nd gear turn. Full throttle down the hill to the brake point will get you only one stop. And that one will burn the paint off the wheels around the lug studs. After finding that out, I feathered the throttle down the hill so the brakes would last. Lighter pushrod Speedsters have an advantage there, and Spyders,of course much more.

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