Boxster caliper/A8 rotor system - 1st impressions

[John Karasaki <johkar@teleport.com>]

For about a year now I've been on a quest to affordably upgrade the brakes
on our 1990 V8 quattro.  After our fair share of wrong turns, it is nice to
have an affordable system that works!

Here's some information:

Car: 1990 Audi V8 quattro

Previous brakes: dealer retrofitted Girling 60 floating calipers (NOT
UFOs), conventional 11" rotors, and Ferrodo carbon metallic street/track pads

Upgraded brakes: 1998 Porsche Boxster 4 piston, fixed, mono-block calipers,
1998-9 Audi A8 312mm rotors, Porterfield R4S pads

1st impressions: improved pedal feel, hauls the car to a stop very fast w/o
ABS, and stops the car immediately with ABS on and the brake pedal mashed
as hard as possible.  ABS pulsing is definitely more abrupt.

Side benefits immediately observed: NO brake noise; fit perfectly under our
16x7.5, 35mm offset Ergon multispoke wheels and under a friend's 16x8 stock
S4 wheels; fills up entire space behind wheel; gray/black Porsche caliper
is understated and looks stock; much easier to bleed the 2 bleed valve per
caliper Boxster calipers than the G60s.

Wife quote: "Good feel.  I finally have BRAKES!  I like it."

Greg Amy will be doing some G-tech testing to be able to present more
detailed results.  I'll also post my impressions after our track day on
April 16th.

I'll also soon post whether or not these will fit behind the 16x7 A8 wheel.

Happy braking!


Best Regards,

John Karasaki