I would have to run it for the tale to be told. I assume it will have the built in power and be very responsive. A muffler mod should give it 3/4 - 1 more PH. That alone will put it up as high as the 390 stock. It has a 48mm piston. The 272 started with a 52mm, they went to a 8/100th longer stroke. Looks like a tall cap so I'm thinking a longer cylinder?
This one has 11.5/100th longer stroke.
I'm thinking very high compression.
It needs to have the pull to keep the centripetal force working or the chain pulls out of the bar too much and chips jam the chain. (Square chisel can be a good cure)That's the problem with falling larger cedar. Loose slabs inside the tree will sit down on your chain just enough to offset the dynamics. Another thing is it can't be susceptible to plugging when doged in through the side cover.
Its faster that the 562 by a metre per second (m/s) with a 7 tooth 3.75 sprocket. 29.3 m/s at 133% max power speed. Max power speed was at 9900rpm.
To me I would think it to means 100% is Max speed power, 1/3 of 9900 Is 3,300
So 133% would = 13,200 but that isn't true because I did the math...You asked..lol.
I believe it would have to turn 15,996 rpm with a 7 tooth to reach 29.3 m/s (29,300mm/s) The 562 has a suggested max rpm setting of 14000 but isn't it auto tune? I don't understand? Anyway this saw is about 3%+ faster.
The 3/8, 7 tooth has a 35 mm dia and a 109.9 mm circumference = 1 revolution.
I believe the 572 revoles 266 times per sec
And 562 at 257. This is all on memory from ten days ago but i'm pretty sure it's perfect.
OH...I have to go...my OCD is 'calling me elsewhere
Your in the pocket... Good Literature. I'd imagine you'd entertain this saw above..........