Have been searching for this answer for a while, typically I look for an answer & give-up when nobody can provide one but this time I'm going to learn the truth!!
For chainsaws, weed-eaters etc, lil 2-stroke engines that get their lube from the oil mixed-in with their gas, for these lil engines is backpressure at the exhaust-outlet of the engine ALWAYS bad?
Removal or piercing of mufflers is incredibly common-fare amongst tree climbers' chainsaws, every last one of mine has modified mufflers and air-intakes, but am working on a new saw that is very special and, in doing its mods, I really gotta learn whether ZERO back-pressure (and air-intake restrictions) is the true-optimal, I mean I know with cars you have the exhaust gases scavenged &re-used but that's not the case on these lil 2-strokes, but what I cannot discern is whether or not optimization of the block's power would be with or without ANY backpressure at the exhaust-outlet port, in-practice it seems this way but want to verify it, thanks a TON for any help getting to the bottom of this!!!