Never saw that in a VW Manual. Just for kicks, I Googled "VW Timing", and found this among many others....
Twist the distributor body to set the timing. I usually set it somewhere between 30 - 32 degrees BTDC (but no more than 32 degrees). Use 25 or 28 depending on your Mag. You don't "Tweak" it, that is just what it is, unless you change the cam, and I believe that most if not all VW conversions, use the stock cam. See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2007 - KR Gathering There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC -------Original Message------- From: Eric Evezard Can some netters kindly explain why VW manuals give 7 deg BTDC and aero conversions give 25 to 28 deg BTDC as the timing.?. How does one "tweak" the VW to use 25 to 28 deg BTDC.?