one.man.band
ArboristSite Guru
I know that being off .5mm on your conrod length isn't going to drastically change anything in the port timing math.. it's just nice to know you're on the money!.. Calipers should do fine (mine go to .005mm), the trouble is finding reliable points to measure to/from
I guess you could also measure piston lift at certain intervals.. lets say 10*, and you'd see which one is the best fit mathematically.. again, probably only to .5mm!
can appreciate your quest for accuracy. the numbers do change quite quickly in a timing program (as you already have seen, i'd imagine).
after you add up all the many separate measurements with error on each, and see just how much patience you have taking things apart and reassembling, it goes kaput when the motor gets heat soaked and grow.
never read on here if folks do recheck clearance when hot?
*i should have wrote 1/2 stroke up there.
hope it helps. not a fan of digital calipers, imo should be thrown in the trash. hahaha