Larger Sprocket = Hotter running saw??

[Redbull661]

So now that I have this thermocouple up and working. A question I wondered about was if running a larger sprocket really made a difference in how hot the saw would run.

Tree Monkey 661
3 new RSK chains
36" bar

I was going to do short bar 7pin to 10pin. But with these #s I don't see the point. Case closed for me. heh

 

[MattG]

A bigger sprocket means higher load on the engine. It's like going up a hill in a higher gear.

So, yeah, a bigger sprocket will probably mean engine works harder, so perhaps hotter, all else being equal.

 

[blsnelling]

So now that I have this thermocouple up and working. A question I wondered about was if running a larger sprocket really made a difference in how hot the saw would run.

Where do you even come up with these ideas?

 

[MattG]

Where do you even come up with these ideas?

Who are you asking Brad?

Me or RedBull?

Though the thermocouple idea is pretty good I must admit

 

[Wilhelm]

So 8 pin is the cut time sweet spot for the given setup.

Temperature wise it doesn't seem to matter much which is actually interesting.

It would be interesting to see clutch temps with different pin sizes, would give an idea of how much slippage a larger sprocket might cause.

 

[blsnelling]

... would give an idea of how much slippage a larger sprocket might cause.

There shouldn't be any. What difference would it make?

 

[Redbull661]

Where do you even come up with these ideas?

So 8 pin is the cut time sweet spot for the given setup.

- usually 9pin is fastest with Stihl RS. But I was using Stihl RS"K" chain which has a smaller raker and more open gullet.

- I'm gonna try 404 vs 3/8 next...

 

[Wilhelm]

There shouldn't be any. What difference would it make?

Didn't mean anything bad with my post!

Was just thinking longevity and tear&wear.

I bought my PS-7310 looking like this

And my PS-7300 came in at a much worse condition, will receive a whole new clutch assembly.

I know that in my case the slippage damage was due to misuse & operator stupidity!

 

[huskihl]

There shouldn't be any. What difference would it make?

Ever felt a clutch drum immediately after cutting? They must slip a little because they're hotter than anything else in the vicinity. I'd think it would be hotter with a larger sprocket given the lower rpm

 

[Wilhelm]

Ever felt a clutch drum immediately after cutting? They must slip a little because they're hotter than anything else in the vicinity. I'd think it would be hotter with a larger sprocket given the lower rpm

Exactly my thoughts!
Thank You.

 

[sawmikaze]

I wanna know when I take a dump why it sticks to the *s-wordter and leaves skid marks then sometimes it doesn't.

Will you test it ?

 

[trooney]

I wanna know when I take a dump why it sticks to the *s-wordter and leaves skid marks then sometimes it doesn't.

Will you test it ?

Your *a-hole is like a chain bar. It all depends on your diet. You eat greasy food the day before, the grease acts as a lubricant and the shat slides out nice and doesnt stick to the shatter because of the lubricating properties of the grease. Now you eat something like vegetables, especially broccolli and cheese, watch out for that combo, it acts like a magnet to the shatter bowl, sticks to everything in site. And you should see what it does to your bowels...Jesus Lord Almighty!!!! Tears it up. Hope I helped you out Ryan. The findings are about to be published in the NEJM. Studys been going on now for some time....

 

[sawmikaze]

Your *a-hole is like a chain bar. It all depends on your diet. You eat greasy food the day before, the grease acts as a lubricant and the shat slides out nice and doesnt stick to the shatter because of the lubricating properties of the grease. Now you eat something like vegetables, especially broccolli and cheese, watch out for that combo, it acts like a magnet to the shatter bowl, sticks to everything in site. And you should see what it does to your bowels...Jesus Lord Almighty!!!! Tears it up. Hope I helped you out Ryan. The findings are about to be published in the NEJM. Studys been going on now for some time....

At what temperature ?

And was it tree monkeyed ?

 

[sawmikaze]

yeah porting helps. but mainly it depends if you took the paint off the bar or not.

Semi dump or full dump ?

 

[trooney]

Full dump....semi dump the study is inconclusive...

 

[XP_Slinger]

I would care about excessive heat build up in the clutch. But what is excessive? Who knows, but that's what this experiment is all about. Thanks for postin RedBull

 

[tree monkey]

At what temperature ?

And was it tree monkeyed ?

 

[Marshy]

Don't all Stihl's wear diapers?

 

[sawmikaze]

I'm telling on you.

@blsnelling

 

[Wood Doctor]

Be careful. The larger sprocket may force you to add an extra drive link to the chain. I've run into this a few times already. All we need is more complexity.