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thstone · 03-30-2014, 08:26 AM

I had the same concerns before I installed my UDP, there is a great discussion here: http://986forum.com/forums/general-discussions/37563-underdrive-pulley-questions.html

My experience is that the 4" pulley worked fine in all conditions including using the A/C while sitting on the grid for 20 mins while waiting for my turn to time trial during 105F days at the racetrack.

Your mileage may vary.

03-30-2014, 08:26 AM	#17
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	I had the same concerns before I installed my UDP, there is a great discussion here: http://986forum.com/forums/general-discussions/37563-underdrive-pulley-questions.html My experience is that the 4" pulley worked fine in all conditions including using the A/C while sitting on the grid for 20 mins while waiting for my turn to time trial during 105F days at the racetrack. Your mileage may vary. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor