Yes. Knocking is very bad for Otto engines (typical 4-stroke car engines). Basically the air and fuel start igniting before the piston is ready to go back down. This puts a lot of stress on the pistons, the rings, the connecting rods, and everything in the engine. It sounds like a hammer is hitting the top of your piston, which is exactly what the damage looks like. Too much will eventually destroy an engine. But rotaries (like the RX-7) will be dead after just one ping. So letting knock run at all is really bad.
FYI, I got some real numbers for the distributor and updated everything, so use them instead.
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"I really like going fast. Just go off and meditate in the wind, you know? As corny as it sounds it works and feels good. It's a good way to just let the weight of the world off every once in a while...is this a big pose? I mean, yes this is a pose! I mean am I driving down the street to not get noticed in this thing? I mean rebellious is what this thing is I would say!!!" -James Hetfield
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