Originally Posted by frog
Stu, just thinking about it all again, I am not sure we talk about the same thing when we talk about decompression plates...
If I understand correctly, when the head is skimmed, it looses a given amount of metal, and the overall depth of the "combustion area" in the head reduces. A decompression plate as I understand it, would recover this depth loss.
Whilst the decompression plate will restore lost compression, it will by its very nature still increase the squish clearance by raising the cylinder head itself to a higher plane and as such is undesireable.