Spark Plug Reading

[gnonyx]

There are many good reasons for reading two great forums (IHADV8.COM & TurboBuick.com).
Both have interesting stories and most that can apply to our own TR.
After reading a member story of "What the Cause Detonation", many had opinions and one of them had on how to read a spark plug.
Here is some sites on how to read spark plugs after running your engine:
http://www.dynamicefi.com/SparkPlug.php
http://www.mopedarmy.com/forums/read.php?7,2959417
http://www.wallaceracing.com/plug-reading-lm.html
This last also gives a "Racing Spark Plug Cross Reference Chart"
http://www.sparkplug-crossreference.com/