Lignator
Swamp Yankee
OK...before I grind, here's the plan:
using an OEM cylinder and piston on a Stihl MS460-
the numbers are ATDC,
stock:
intake: 73 deg (146 duration)
exh: 103 deg (154 duration)
trans:123 deg (114 duration)
blow down: 20 deg
proposed:
intake: 83 deg, I need to grind .118" off the piston skirt (166 duration)
exh: 98 deg, RAISE exhaust by .06" (164 duration)
trans: 115 deg, RAISE trans by .087" (130 duration)
blow down: 17 deg
this seems like a lot of material if i go by the numbers. before I cut, does this all seem reasonable?
btw, I used a crank length of 2.5" (63.5 mms) and a stroke of 36mm.
welcome feedback.
using an OEM cylinder and piston on a Stihl MS460-
the numbers are ATDC,
stock:
intake: 73 deg (146 duration)
exh: 103 deg (154 duration)
trans:123 deg (114 duration)
blow down: 20 deg
proposed:
intake: 83 deg, I need to grind .118" off the piston skirt (166 duration)
exh: 98 deg, RAISE exhaust by .06" (164 duration)
trans: 115 deg, RAISE trans by .087" (130 duration)
blow down: 17 deg
this seems like a lot of material if i go by the numbers. before I cut, does this all seem reasonable?
btw, I used a crank length of 2.5" (63.5 mms) and a stroke of 36mm.
welcome feedback.