Some guys like to open the mouth of the exhaust flange as big as possible. I personally don't see the need to do that on a work saw. Look how much bigger the flange area already is than at the cylinder wall.
Stihl MS461 R
- Thread starter mweba
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I'm with you on this. I like to leave some meat for a mating surface on a work saw. I don't believe the gains are worth the worry.
On this particular saw the exhaust isn't even widened, port shape can be just as important if not more. Again I don't want to give up longevity.
Down her throat.
Untitled by mweba1, on Flickr
srcarr52
We can't stop here, this is bat country.
Go big or leave it at home!
Wondered where you were.
srcarr52
We can't stop here, this is bat country.
Cleaning the house.
Cold feet?
srcarr52
We can't stop here, this is bat country.
Not until I realized I was actually cleaning the house. 13 more days till I jump off that cliff.
Saw was back down for wear inspection and a good old fashion fondling. Ended up at
102 156
117 15
75 150
to get the compression down and of course gained a couple revs. Tach didn't show any difference in the cut.
Three tanks through it cutting frozen Ash for a hour.
Untitled by mweba1, on Flickr
Eight pin 20" is loading.....thanks rural interwebs, two hours counting down
102 156
117 15
75 150
to get the compression down and of course gained a couple revs. Tach didn't show any difference in the cut.
Three tanks through it cutting frozen Ash for a hour.
Untitled by mweba1, on Flickr
Eight pin 20" is loading.....thanks rural interwebs, two hours counting down
Numbers look good for a work saw. How do the 461's like to be tuned?
With those numbers by the end of the day 13,800 to 14,200 had consistent cut times with a safe four stroke. Chamber was cut .030 base .035 still running shy of 190psi
Vid with eight. Frozen Ash having fun. 13.8K in this vid.
[video=youtube;cPJYlAO_k5w]http://www.youtube.com/watch?v=cPJYlAO_k5w&feature=share&list=UUXrUSTTnD1KfjS6rJBCxhhg[/video]
Looks like the 660 is officially obsolete. Noodling with an 8 pin is always fun.
Noodling with an 8 pin is always fun.
Stihlman441
Addicted to ArboristSite
Sounds good to me,thats still with the single port muff ya.
Thats how i make kindling out of pine,noodle afew cuts then cut cookys instant fire starting kindling.
Thats how i make kindling out of pine,noodle afew cuts then cut cookys instant fire starting kindling.
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Stihlman441
Addicted to ArboristSite
Saw was back down for wear inspection and a good old fashion fondling. Ended up at
102 156
117 15
75 150
to get the compression down and of course gained a couple revs. Tach didn't show any difference in the cut.
Three tanks through it cutting frozen Ash for a hour.
Untitled by mweba1, on Flickr
Eight pin 20" is loading.....thanks rural interwebs, two hours counting down
Couple of questions there Mitch
We went from
Stock comp 168 cold
ex 104 152
trans 120 16
intake 71 142
squish .030
After 190 psi ish
ex 105 150
117 12
75 150
squish .026
Ended up at psi ?
102 156
117 15
75 150
Squish ?
Did you just add a gasket under cylinder ?
Allso in the pic the slot in the cover on the right is that for the winter,summer worm air off the cylinder thingy. ?.
In the spring I grill over those. The "french fries" make quick coals. It runs as good as it looks. Very pleased with the outcome.
Andre, if this design carries to the 661 and meets emissions, Stihl is on to something. Rotating mass is minimal as well as simplified engineering. Add electronic fuel control and we have a good big two battle to come...
Psi is 180ish (subject to gauge) at the moment. It may end up in the mid to high 180's. Squish is still at .026. I raised the exhaust a bit to bleed off compression and give a tad more blow down.
The hole to the right does not enter the filter area. Another piece can be removed for winter cutting.
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Officer's Match
Addicted to ArboristSite
Looks like a fantastic works saw Mitch. Great work.
Stihlman441
Addicted to ArboristSite
Hi ya Mitch you have been a bit quiet hope all is well.
Did you end up with the dual port muff cover on it,notice any differance.
Has the other two turned up yet.:smile2:
Did you end up with the dual port muff cover on it,notice any differance.
Has the other two turned up yet.:smile2:
Been busy
Got that 555/560 sorted and started another 550, wife is getting a little short with me but if you don't give em an excuse, they will be looking for one. We can't have that :msp_rolleyes:Picked everything up Friday but didn't get around to assembly til last night. Played with the carb a bit, smoothing out the fuel curve, making sure she gets enough on the top side. Short of the long, the 461 will be moving on this week.
The other 441 arrived postal last week as well. Tore down with a parts list started. Email ya on that subject later.
I will try to catch some more vid before she goes.
Stihlman441
Addicted to ArboristSite
Cheers mate.
Dont let me get you in truble with the boss,just blame me others do.
Dont let me get you in truble with the boss,just blame me others do.
The saw sounds great! Have you considered giving it some more intake?
