Never been decked. Still 5.200"
I don't think it's detonation, as it is in the same spot in cyl 1 & 4 and nothing in 2 & 3. But I'm no expert on this.
Here's what the engine man extraordinaire on t00ners says:
Quote:
Originally Posted by BogusSVO
Common, very common, I see the rough casting in the combustion chambers more often than not.
It can be polished out, or run as is. Depending on what the goals of the engine/car are.
If you polish them out, make sure to cc each chamber and equalize them with in .5cc from largest to smallest.
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