661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[bwalker]

Bwalker, was that a Redline oil?

Yep.

 

[bwalker]

Ms 660 i only use for milling ,h1r 32 to 1 ,the way the muffler is here ,everything is nice and oily ,if i choke it down with a stock muffler things are all dry inside without touching the carb ,i will have to see if can get a little mirror to photo the piston top ,as wet as everything is ,it should soften most carbon and be pretty clean i would think .View attachment 417626 View attachment 417627 View attachment 417628 View attachment 417629 View attachment 417630

The muffler should be dry.

 

[blsnelling]

Yep.

Redline is known for that.

 

[blsnelling]

The muffler should be dry.

I imagine that he tunes a milling saw much richer. I also suspect that's why some people have cleaner piston crowns.

 

[bwalker]

Redline is known for that.

It is.

 

[Trx250r180]

The muffler should be dry.

I tune my saws for a long bar ,they may be richer than someone with a shorter bar would tune to ,i drop a 32 inch bar into a log ,and adjust till get the most power ,in smaller stuff it does 4 stroke a lot ,milling the saw pulls clean in the cut ,no 4 stroking ,i have played a lot with exhaust ports ,the more i let the saw breathe the wetter the can gets ,my triple ported saws have wet muffler cans also on smaller saws .So trapping the heat in i was getting dryer mufflers ,but i would rather have a cooler saw .

 

[bwalker]

I imagine that he tunes a milling saw much richer. I also suspect that's why some people have cleaner piston crowns.

I am sure he does, but given the load invoked it should still be clean.
It's a fine line but if one gets real rich the crown will be when nearly clean.

 

[KG441c]

Ms 660 i only use for milling ,h1r 32 to 1 ,the way the muffler is here ,everything is nice and oily ,if i choke it down with a stock muffler things are all dry inside without touching the carb ,i will have to see if can get a little mirror to photo the piston top ,as wet as everything is ,it should soften most carbon and be pretty clean i would think .View attachment 417626 View attachment 417627 View attachment 417628 View attachment 417629 View attachment 417630

Dont see how it can get better than that!

 

[bwalker]

I tune my saws for a long bar ,they may be richer than someone with a shorter bar would tune to ,i drop a 32 inch bar into a log ,and adjust till get the most power ,in smaller stuff it does 4 stroke a lot ,milling the saw pulls clean in the cut ,no 4 stroking ,i have played a lot with exhaust ports ,the more i let the saw breathe the wetter the can gets ,my triple ported saws have wet muffler cans also on smaller saws .So trapping the heat in i was getting dryer mufflers ,but i would rather have a cooler saw .

I have always tuned a saw using a tach in the cut with the bar I planned on using. Basicly you tune it till it cuts best and a good starting point is slightly leaner than when the motor four strokes in the cut.

 

[bwalker]

Dont see how it can get better than that!

I had a pic posted of my Grefardized then EHP built ms 260 back in the day, but it is no longer on the site. It showed the muffler piston and cylinder.
I'll see if I can post a pic tonight.

 

[Trx250r180]

I have always tuned a saw using a tach in the cut with the bar I planned on using. Basicly you tune it till it cuts best and a good starting point is slightly leaner than when the motor four strokes in the cut.

That is more or less how i tune ,but i use my ears instead of a tach ,my saws are modded so a tach is worthless in my opinion ,unless you know where the particular saw is happiest at ,all personal preference ,i bet if i put a tach on my hybrid it would be in the 15k range plus ,that saw revs much higher than my 461 or 660 does ,if my saw 4 stokes way too much or burbles after the long bar tune ,i will go 1/8 leaner at a time till cleans up .I am still going to be richer than most will set at ,but it works for what i do .

 

[SAWMIKAZE]

I tune my saws for a long bar ,they may be richer than someone with a shorter bar would tune to ,i drop a 32 inch bar into a log ,and adjust till get the most power ,in smaller stuff it does 4 stroke a lot ,milling the saw pulls clean in the cut ,no 4 stroking ,i have played a lot with exhaust ports ,the more i let the saw breathe the wetter the can gets ,my triple ported saws have wet muffler cans also on smaller saws .So trapping the heat in i was getting dryer mufflers ,but i would rather have a cooler saw .

My 461 was tuned at 14000 , it seemed to run really well there , i had the belray mixed at 32:1 and my muffler was soaked with oil inside..good or bad fellas ?

 

[Trx250r180]

My 461 was tuned at 14000 , it seemed to run really well there , i had the belray mixed at 32:1 and my muffler was soaked with oil inside..good or bad fellas ?

Potato

 

[bwalker]

I tune my saws for a long bar ,they may be richer than someone with a shorter bar would tune to ,i drop a 32 inch bar into a log ,and adjust till get the most power ,in smaller stuff it does 4 stroke a lot ,milling the saw pulls clean in the cut ,no 4 stroking ,i have played a lot with exhaust ports ,the more i let the saw breathe the wetter the can gets ,my triple ported saws have wet muffler cans also on smaller saws .So trapping the heat in i was getting dryer mufflers ,but i would rather have a cooler saw .

I use a substantial piece of wood and load the saw heavily. When you find the highest rpm that cuts the fastest while doing this you are bang on. And I have used it on the half dozen modified saws I have owned

 

[bwalker]

Older Stihls like the 440, 360, 260 etc burn pretty damn dirty because there port layout was pretty crude. Husky's transfer port setup on saws like the 346 and 372 always scavenged much better. Also why the Husky's were faster than that era stihls

 

[KG441c]

http://pages.ebay.com/motors/link/?nav=item.view&id=301126503616&alt=web

 

[SAWMIKAZE]

Potato

 

[Mastermind]

Well......

I like turtles.

 

[blsnelling]

I like oil!

 

[Mastermind]

I like oil!

Deep fried turtle?