Cam driven brake booster

Thu Sep 26 01:36:05 EDT 2002

The 4K's don't have the brake Bomb like the 5K's for brake pressure
assisting as I understand it.
Two different animals.  Two ways to get and apply vaccuum?  The bomb stores
brake pressure while the 4K uses motor cam mechanics to build pressure.
Any experts have the correct answer?
-Scott in BOSTON
Message: 13
From: Bill Phelps <wphelps at rizzo.com>
To: "'quattro at audifans.com'" <quattro at audifans.com>
Subject: Why does the 4KQ need a separate vacuum pump?
Date: Mon, 23 Sep 2002 16:14:16 -0400

Just wondering why the cam-driven pump is needed for the brake
booster....It's the first one I have seen on a car..