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Point gap affects dwell and timing. if your timing is spec than having the dwell off a bit wont affect detonation. If your detonating and your timing is stock check and make sure your not running lean or more importantly that your using the correct octane gas for the car, which is 92 OCT in the US with that car. If its still knocking and pinging then somebody probably fly cut the heads and didnt add shims to lower the compression ratio... common problem. Keith > > I want to be clear on some simple timing procedures involving, Dwell, RPM, > Advance. I started tweaking my timing this weekend due to heavy pinging > during load on my 67 Fasty. It started and idled fine, I had set the timing > @ 7 1/2 BTDC with the engine warm and the vaccum hose disconnected but once > it warmed up I experienced heavy pinging so today at a local swapmeet I got > a dwell meter. I had set the dwell to specification with a feeler gauge but > once I checked it with the meter I got today I noticed that according to the > TM I was setting it at about 33. The TM specified 42-54 so I forgot about > the feeler gauge method and decided to go with the reading on the meter as > the engine was running. After I did this I rechecked the timing and set it > at 7 1/2 BTDC, the RPM at 850 RPM between synching the carbs. I have not yet > tried it but I am in a bit, can anyone shed some light on this for me. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ Shameless link for search engines: http://listarchive.type3.org ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~