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🤙🤙🤙
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!!!
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 😃
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.
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.
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
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.
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.
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!!!!
That cut away saw takes all the mystery out of the build and provides a clear picture of all the mechanical functions. Very nice 👍👍
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
You're welcome, that is 100% why I do this.
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.
I tried my best to explain it. I appreciate the feedback
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
Cutaway model is awesome for showing concepts 👌🏼
The Tinmaster😎 This is awesome info, thanks man!
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🤙🤙🤙
Thank you Tinman, I've been wondering about this and hadn't quite figured it out. Showing how this works on your cut away really helps!
Love the cutaway! Definitely helps to be able to see it when one cant quite visualize something👍🏻
You're popular in the motorized bicycle community... I would love to see you do an Avenger 85 or MS 660 on a beach cruiser 100%
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!!!
Hi Tinman , love your channel. Quick suggestion for next time you do a video like this. Mount the timing wheel facing the piston.
Cheers!
Does it zero out on top dead center after you moved the cylinder
I'm glad folks like you are asking questions this video was made for that reason.
I will make a.follow up video on this.
I was waiting for the piston stop to go back in too see also
Yeah, wondering the same thing, if you re-zero do you still see this. On to the next video to find out.
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 😃
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.
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.
The old offset bore and piston trick ? used in auto engines a lot
Shhhhhhh lol
So you could shave the piston skirt to increase intake opening duration without changing exhaust timing, or transfer timing.
Yes
When you move the cylinder forward you have to adjust TDC
Great explanation.
Very insightful, thank you. Weather sounds about the same as the UK and I'm a gardener so not great for me either😁
We used to have a giant garden but have scaled back since having the wee one.
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
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.
How do you think that would affect engine rpm?
You are having the same 💩 weather edmonton has, I'm ready for warm dry weather and cold beers
Nice job tinman very interesting 👍👍
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.
I'll bet those are your issues.
Why would the cylinder move unless it's been on and off a lot, and bolt holes have gone slack🤷🏻♂️ or am I missing something 😂
The cylinder doesn't move, crank center line can be off during the manufacturing process which is the same as the cylinder being forward.
Wouldn’t it be easier to just move the camera!! 😂🤣
Fascinating. I say trust the math, question the science.
Hello TinMan
Hey buddy
why not print the timing marks on both sides of your timing wheels?
On most applications for these wheels you cant see the back of the wheel. They are not made just for chainsaws.
🤔🤔
No that’s not how you do it but it’s very close
Thanks tin man
I’ll leave this stuff to the knowledge people love watching your videos but I’ll just run stock I probably will stuff it up thanks for all your videos
How's the Tinman and family
Shouldn’t you rezero after moving the cylinder?
That's a good question.
Yes, because the wrist pin is no longer directly in line with the crank journal and connecting rod journal at the former “TDC”
You have just made a Desaxe engine by moving the cylinder and yes the numbers will change
You used the wrong cylinder half I believe. The exhaust and intake are reversed. But you may already addressed this.😊
Actually you can just use the other crank half.