What oil is best? and what ratio?

[CoreyB]

I want to rig up a cylinder temperature gauge just to see. I know at the end of a cut the cylinder is near 500°. That's about 150° hotter than redbull has gotten any time. They won't score there if they've got a good tune. I've run out mid cut when I didn't realize it would use 2 tanks per cut. Not a good feeling when it screams lean for a second and dies.

Plus no idle or cool down time. I could see that not being a comfortable situation.

 

[Clemsonfor]

16:1 with sae30wt oil. May smoke some but it worked for years!! Just keep an extra plug handy and make sure you de-carb the engine every 20 hours or so!

 

[Chainsaw Jim]

I can assure you that a saw I tune isn't rich and there will be carbon.

Yeah but that's because you won't listen to bwalker.


No seriously though...I'm not saying there shouldn't be. I'm interested in learning why the presence of carbon helps. I'm not calling anyone out or setting any bait. I'm genuinely curious after reading all the back and forth.

 

[Chainsaw Jim]

I want to rig up a cylinder temperature gauge just to see.

What about using a laser temp gun?

 

[CR888]

I want to rig up a cylinder temperature gauge just to see. I know at the end of a cut the cylinder is near 500°. That's about 150° hotter than redbull has gotten any time. They won't score there if they've got a good tune. I've run out mid cut when I didn't realize it would use 2 tanks per cut. Not a good feeling when it screams lean for a second and dies.

Thermocouple washer & reader.....eBay.

 

[jmssaws]

Yeah but that's because you won't listen to bwalker.


No seriously though...I'm not saying there shouldn't be. I'm interested in learning why the presence of carbon helps. I'm not calling anyone out or setting any bait. I'm genuinely curious after reading all the back and forth.

I don't know if carbon helps or not,I do know that if there isn't carbon after some run time it's not burning it and your loosing power.
A saw the transfers are working good in will have a wash patern longer but there's no saw with a few million bdft under its belt that's anything but black that I have seen.

 

[jmssaws]

I want to rig up a cylinder temperature gauge just to see. I know at the end of a cut the cylinder is near 500°. That's about 150° hotter than redbull has gotten any time. They won't score there if they've got a good tune. I've run out mid cut when I didn't realize it would use 2 tanks per cut. Not a good feeling when it screams lean for a second and dies.

Egt in the muffler at the exhaust port?

 

[Keith Gandy]

Yeah but that's because you won't listen to bwalker.


No seriously though...I'm not saying there shouldn't be. I'm interested in learning why the presence of carbon helps. I'm not calling anyone out or setting any bait. I'm genuinely curious after reading all the back and forth.

Dont think it will help but carbon is a indicator of tune and proper combustion for max performance

 

[Keith Gandy]

I actually can buy that a layer of carbon acts as sort of an insulator on top of the piston and helps pass heat on out the muffler

 

[Chainsaw Jim]

I actually can buy that a layer of carbon acts as sort of an insulator on top of the piston and helps pass heat on out the muffler

Yeah that would definitely be a benefit and help the piston from running to hot. I suppose quenching can't be very affective with a two stroke since the piston never reaches tdc without firing.

 

[bwalker]

Won't carbon build up on the piston crown prohibit a good quench which is more important in an air cooled two stroke chainsaw motor?
A cleaner burn will produce less carbon, so using higher quality oil and richening it up just to see carbon build up seems like the wrong thing to do.

The majority of the cooling occurs in the crankcase when the fuel evaporates.

 

[bwalker]

Egt in the muffler at the exhaust port?

Will run around 1000 degrees give or take depending on the distance from the piston IME.

 

[bwalker]

Yeah but that's because you won't listen to bwalker.


No seriously though...I'm not saying there shouldn't be. I'm interested in learning why the presence of carbon helps. I'm not calling anyone out or setting any bait. I'm genuinely curious after reading all the back and forth.

Add Stihl, Husky and most everyone else who knows what they are talking about to that list.
All engines have carbon on the piston, even four strokes. If you don't have any carbon it simply means your running too cool and not making full power.

 

[junkman]

Got a pic of how the saw lays on the mill

 

[jmssaws]

You need a pipe muffler like I make

 

[junkman]

Looks loud ,does it send the sound away at all ?

 

[jmssaws]

Looks loud ,does it send the sound away at all ?

It's much quieter than any other way I've found.

It points it away,behind the saw its not much louder than stock but in front it's loud

 

[wildroamer]

Just noticed the tag for this thread, too funny, glad I'm not a queer anymore!

 

[Redbull661]

ok here are the past vids...

1st klotz 36:1 but we had the old style boot with the washers out of place so these results are suspect.

Next - this is saw after 3-4 tanks of honda hp2 36:1

then the saw after 4 tanks of schaeffers 32:1

and today saw after 4 tanks of klotz 42:1

My thoughts - Either 1. the saw got really dry from just going from 36:1 to 42:1 OR 2. the boot was the problem on the first video and I should run 36:1 again.

 

[Redbull661]

more pics...