I think it's comical that people would get snotty with you over this. You say in almost every video that you do this for fun, and do it just to teach people what you have learned over the years. So THANK YOU Tinman for teaching us, I've learned so incredibly much from you man! I ported my first saw because of you, did up my MS460 and she rips all thanks to you!!!!
All know is I'm thankful for all the info you share with us I split the cases ported and piped my 372 from watching your videos and lightened the piston she ripps now lol
This is the same principle, crank angle, why a stroker engine produces higher torque with a longer rod, say going 6.0” from a 5.7” rod with the same stroke. Very well explained Tinman.
Ive learnt so much from your channel. Just finished doing my first 372xp. bottom end and ported top end too. thanks to your videos!. Keep'm coming - they're so helpful. Cheers from NZ
Interesting... indeed.... through in a knock off crank and who knows where you could end up. Wonderful insight, never thought of the cylinder shifting on the case. Thank you. TC Mahalo Tinman🤙🤙🤙
That's pretty wild tinman. But it does make sense when moving the cylinder forward that it would affect the effective throw of the rod. Still crazy though
UPS is delivering my husky 550xp mark2 Today ...I'm really excited it's my first brand new saw ever . I've always bought used.. I think I heard that tinman wants to Port it for me 😃
Yeah it's called an offset crankshaft. It's not inline with the wrist pin on the piston. Some motorcycle engines do this on purpose to achieve different power bands and dynamic balances.
Awesome video Tinman I really appreciate all of the knowledge you share with us and the time you take to make the videos to share that with us. Thank you!!!
It's insane that people get wound up over this, there are a ton of videos on youtube explaining it. They clearly haven't done any research and are just shooting from the hip. The Driving 4 Answers channel does a really thorough and in-depth video explaining the phenomenon and covers why rod length matters even between engines with the same bore and stroke. Fortnine also covers it several times when explaining secondary imbalance in various multi-cylinder (motorcycle) engine designs.
Thanks Tinman! Generally I don't worry unless the timing deviates by more than 1 degree when checking both directions. If they're off by about 1 degree, I assume I can average the two numbers.
Watched the 026 Stihl vid last night, decided after work today, tearing apart my 036 Pro, it won't run right. Took it down to the chassis, I have the smallest pin hole in my impulse line it won't hold air. And my rubber intake boot is original. While I'm here, doing a base gasket delete and already did a muffler mod. Hope I found the problem.
It the cylinder is not perfectly centered over the crankshaft, if it is fore or aft, you can and will get different timing numbers on opening and closing.
