Ok I see, so then I cannot understand why you should make them tapered. Just make pistons with in between hole sizes and you will have the same subtle effect...
To me, the test shows that the taper has no effect on damping, otherwise it should show a difference between in or out... (why not make them tapered on both sides, or not tapered at all). Running losi pistons in your asso shocks will also be better over bumps, since losi pistons are rounded on each side and asso pistons have a sharp edge.
I believe it is impossible that a different shaped piston on each side will let the oil flow exactly the same, and give the same pack in both directions.
Ok if you compare a std losi piston vs a ghea one, of course it will feel different, they are completely different shapes (losi's are rounded on each side).
I have made losi pistons with tapered holes, and you can feel the difference in and out even by hand! Don't need a machine for that. If you pull and push the shaft very quickly, you really feel that pushing in locks earlier than pulling out. (with taper on the bottom).
Just try to run ghea pistons with the taper on top, I think you will be amazed. If not, it proves that this kind of taper does nothing. With my selfmade tapered hole pistons the difference is huge.
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