Someone had said that there would be no AC at idle with a 4" UDP, so I thought I'd post my results to clarify.
I installed my Tarret 4" under drive pulley and all went well and better than predicted.
Particularly, I am happy to report that a 2001 S with the 4" under drive pulley still allows full operation of the air conditioning at idle!
Here is the Proof below:
With the Tarret UDP installed and the engine up to full operating temperature,
Ambient temperature 70 F as shown on the guage, and ~750 rpm at idle for over 5 minutes, airconditioning set at full the temperature of the air leaving the vent is ~38 F.
Tarret UDP and Original
__________________
"It broke because it wants to be Upgraded
"
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)