Piston to valve clearance
#2
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from everything I read about neon's, all 2.0's will have piston to valve interference even stock. I can only imagine when you increase compression and put in a bigger cam, you'll for sure hit with loss of cam-crank timing. but if you're asking about clearance with increase in compression and increase in cam, no, you won't hit unless you break the belt. I read a guy that had the biggest crower cam, milled his head, dome pistons 14:1 compression on a 2.0 neon and had no problems. the best way to determine an answer, is do what all performance engine builders do. put clay on the pistons, assemble engine, rotate crank, remove head and measure squish on the clay.