986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Hot brakes , how do they feel?Is this a symptom?

MNBoxster · 04-16-2007, 11:57 PM

Hi,

Sounds like Boiling Fluid to me. Someone traveling through the twisties with no Traffic isn't likely to encounter Heat Fade.

The SAE did a study of 1,000 two year old cars and found the average moisture content in the Brake Fluid at 4% with a high of 7%. At 4% moisture content, the Boiling Point of DOT4 Fluid will drop to about 240°-260° F - not much better than using straight water in the system...

Happy Motoring!... Jim'99

04-16-2007, 11:57 PM	#3
MNBoxster Registered User Join Date: Sep 2005 Location: Minneapolis/St. Paul, Minnesota, USA Posts: 3,308	Hi, Sounds like Boiling Fluid to me. Someone traveling through the twisties with no Traffic isn't likely to encounter Heat Fade. The SAE did a study of 1,000 two year old cars and found the average moisture content in the Brake Fluid at 4% with a high of 7%. At 4% moisture content, the Boiling Point of DOT4 Fluid will drop to about 240°-260° F - not much better than using straight water in the system... Happy Motoring!... Jim'99