massivemods - what is the reason for the 0.6 head shims that you suggest?
i have a 7 port with turbo head, and os p3 plug. engine came with 0.3 shims (total).
i didnt saw any problam with engine operation with stock shiming until the piston broke after 3 liter of use. is the shimming may be the reason? or it was just defective?