Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
 
LinkBack Thread Tools Display Modes
Old 08-28-2011, 06:40 AM   #1
Registered User
 
Join Date: May 2011
Location: Maine, USA
Posts: 126
Are your tires good? If the fronts are weak, that could cause howling and premature ABS.
dmairspotter is offline   Reply With Quote
Old 08-28-2011, 09:05 AM   #2
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,652
The front to rear braking bias is controlled by a proportioning valve system, which normally is heavily biased to the front to prevent rear brake lock up. Testing of the bias is normally done with some very high pressure (3,000 psig) specialty gauges, not something everyone has. The valve system is not adjustable, so if it is off it has to be replaced. On the early cars (ABS/TC), the valve is separate, on later cars (ABS/PSM), it is part of the stability management system.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is online now   Reply With Quote
Post Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 03:18 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page