Hope this don’t come off the wrong way because thats not at all my nature. I truly like sharing and helping where I can! It’s always better to check squish over top of the wrist pin above the transfers rather than above the exhaust or intake to get an accurate reading,, the piston being smaller at the top than at the bottom by .004 to .005 on 372 if you factor in the bore clearance for the piston that can add an additional .0015 to the equation So when the solder is pinched over top of the exhaust or the intake, the piston acts like a seesaw for instance, putting the solder over top of the exhaust, would allow the piston to raise higher in the back over the intake and dip toward the exhaust until the clearance of the piston is taken out against the cylinder wall and adding it to your squish measurement, so measuring over the exhaust port side with a measurement of .020 can be quite different from the measurement taken over top of the wrist pin by as much as .004-.005. It is possible to check it over the exhaust accurately you would just need to bend a piece of solder the same diameter, and insert it over top of the intake at the same time the equal pressure applied to both sides of the piston, eliminates the seesaw effect giving you a true reading, but this is accomplished much easier by just checking it over top of the wrist pin. Even doing it on one side or the other of the wrist pin You will still have some deflection, but typically no more than .001-.0015. In cases where you’re running really tight tolerances it’s always good to stick a piece in on each side over top of the wrist pins for the most accurate reading if you plan to run really tight squish. Hope this helps sincerely JBH performance saws.
It's a beautiful woodslasher you have something to be proud of and your grampa would be very proud of you. Your kids will love it to should last a long time treated right. It will only get more beautiful with age. Nice job my friend ❤
Some of these saws got more work after these videos too. We've chased a half dozen issues with that 2150 and made more than a few changes in the porting.
It’s BS that Husky’s 70cc pro saw is spitting out spark plugs, I took the decomp out of mine and the threads came with it for no darn reason. Regardless its an awesome saw with smooth AV and excellent air filtration. Just had to rant about that though.
Great job man! 30% gain is good on those saws, it’s around a 1.5hp gain. Most muffler mods are 0.5hp gain I would expect paying for porting to at be around a 1hp gain.
@@douglasdonegan9372 if I did, I wouldn't recommend them. Porting cylinders apart from the saw itself is a sure way to have less performance and more problems.
Cool video🥰!!Would you be interested in testing a mask from the second-largest mask manufacturer in the United States and sharing it with your fans through a reel post?
These filters rock, i wish echo would go back to these style filters, at least on their Pro models. 501and 620. Something similar on the 2511 would be nice too.
Man I can't wait to see you test this. I keep hoping Mr. Harkness will put one on the dyno. I know when the stock filter gets clogged and oily you can tell it with your tune. It has to be quite restrictive.
@@appalachiansaw That is for sure. Its a shame echo got so many air filters RIGHT in the past that I don't know why they have to break formula. The 620p desperately needs better options too.
