Originally Posted by teknorc

To add to all of the discussion and throw another HUGE variable into the mix - the height of the holes (thickness of the piston) will have drastic affects on damping characteristics. Unless the pistons are identical in thickness, they can't be directly compared. For example, thicker pistons need larger holes for the same effective damping with the same weight oil. The jury is still out as far as whether a thinner or thicker piston is better.

Carry on...