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Service Garage Online Sharkbit - Water Cooled V8's T-belt Notebook for the 928 IDownload Sharkbit, in Adobe PDF (about 1MB- right mouse click and select "Save target as"). After downloading be sure to read the LEGAL and SAFETY NOTICE The Virtual Timing Belt Gauge Version 1.0A NOTE : THIS TONE HAS NOW BEEN VERIFIED BY THE PORSCHE GAUGE to be 5.3+/- 0.2 (First try!) Download the .wav file Right mouse click and select "Save target as") Background: A belt is just like a guitar string (bass guitar that is) under tension it produces a note. The note is determined by the distance of the two contact points and the tension of the belt. Using sound is an extremely accurate method of measuring tension. How to Use: Turn engine to TDC with CAM marks aligned. There is a significant drop in tone right after TDC - so be careful!. In a quiet garage, pluck the belt at the measurement point (same as the factory gauge) with a stiff plastic instrument - e.g. a stiff plastic applicator. Compare the note from this wave file to the sound of the belt & adjust accordingly. The second or lower sounding group of tones on the wave file is approximately where the timing switch makes/breaks contact. The first and last group of tones is 1/2-2/3's turn in on the adjustment bolt.
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