It finally dawned on me what Mr Fabian is so confused and blathering on about with his ignorant misuse of the term ‘tuned pipe’ and mistaking a pipe-stub-stuck-in-a-can for one.
It’s the thing about the relationship of the amount of back pressure provided by the muffler, to the amount of blowdown.
While there is some basis in fact there, it seems to be more relevant/advantageous, in a small way, to relatively choked up stock configurations with a lot of blowdown. With some saws it can be at least noticeable and some not so much.
Once things are opened up and breathing well the advantage of ‘tuning’ the outlet to blowdown seems to be negligible and pretty much becomes bigger is better, bigger to a degree anyway. Any 'optimization' past that is more about noise level vs power gain...
Still goes back to him reading too much Wojo and other obsolete disproven nonsense (like compression over 180psi killing revs) that has little relevance to porting work saws.
Sort of makes me laugh to think that Frank/Gary got sucked into a bunch of sales hype bs from someone with tactics so similar to his own.
Sometime further up the road it will be a Piltz style bar and sprocket setup, lol.
Though maybe not because judging by his saw videos, he seems to be afraid of what big wood and long bars will do to his gains…