Can Detonation Do This????

[Bruce Fulper]

If the dist was not moved after the cam slipped the ignition timing retarded right with it. If the ignition timing was reset after the cam slipped he could have been putting too much heat in the combustion chamber due to the advanced ignition timing. Also the late intake opening would not allow a complete burn of the A/F mixture at the rpm's he was trying to spin. Too much of that will make carbon deposits in a hurry. Lots of leftover unburned fuel.

If there was THAT much stuff laying in the cylinders the tops of the pistons would look like the surface of the moon. kinda. Heavy sandblasted look anyway.

[John Duzac]

Everytime I had detonation it hammered the rings out causing some 30 to 40 % cyl leakage. This was after 10 to 15 runs and evey run would get a little worst. Additionally, we would take the engine out of the car and remove the oil pan only to find what looked like sludge in the pan. The engine looked like we never changed the oil in 50,000 miles! What a mess and a costly on at that! L little colder spark plug and C-14 racing gas cured the problem.

[Paul Precht]

When the cam is retarded beyond normal the exaust valves may hit the pistons. The compression will go down at the same time so your chances of a detonation issue where there was none before are almost not possible. Paul.