Oil questions...

[bwalker]

Not so simple. Thicker oil and lower temperatures and m tronic is kaput.

Never seen that. Same story with Autotune.

 

[pbillyi69]

I believe its the opposite. Filter gets clogged, less air gets in. It leans the engine out to maintain rpm.

thats right. what i meant that it changes as it needs to so it stays running at max power without having to manually adjust a screw

 

[dangerousatom]

Air Temp and Altitude/Ambient air pressure and how smooth its running ( a knock sensor type detection ) is about all the new compy-controlled saws read. They control RPM with basically only those 3 things. That's why the don't run great at partial throttle.

From what I can tell the saws dont know what Octane your running or what mix ratio. I believe there is a "sweet spot" window that the programing is shooting for, thats why they are constantly adjusting while cutting or idling. With an EGT and O2 sensor you could squeeze more out, but that leads to a bigger control chip, more programing and the need for more sensors. Those additions on a small engine let alone a 2-stroke have way more failure potential and just issues in general. That along with a likely battery or winding like a heated saw has to run all the unneeded sensors.

IMO the new Auto-tuned/E-tronic saws are just a way to get big Gov/EPA to pat the company on the head and say good job we wont bother you for a could of years now. I dont even believe they are more efficient or cleaner in the long run of use. If they are less a saw in terms of power and reliability then your going to use more fuel to get the job done or buy more parts because of failure witch is basically fuel in one way or another.

-Getting the job done in the least time and fuel efficient way along with the use of the simplest, least "break down" equipment is always the most economical on all levels.

 

[FederalQ]

Not so simple. Thicker oil and lower temperatures and m tronic is kaput.

Looking up the specifications of the referenced Dominator 2T oil, it‘s viscosity is listed in the US SAE 20 grade range so it should not be too thick.

 

[Duane(Pa)]

Mtron is fine at 32:1. Don’t worry about oil ratios. The 50:1 BS came along with an EPA mandate for small engine emissions

 

[bwalker]

Air Temp and Altitude/Ambient air pressure and how smooth its running ( a knock sensor type detection ) is about all the new compy-controlled saws read. They control RPM with basically only those 3 things. That's why the don't run great at partial throttle.

From what I can tell the saws dont know what Octane your running or what mix ratio. I believe there is a "sweet spot" window that the programing is shooting for, thats why they are constantly adjusting while cutting or idling. With an EGT and O2 sensor you could squeeze more out, but that leads to a bigger control chip, more programing and the need for more sensors. Those additions on a small engine let alone a 2-stroke have way more failure potential and just issues in general. That along with a likely battery or winding like a heated saw has to run all the unneeded sensors.

IMO the new Auto-tuned/E-tronic saws are just a way to get big Gov/EPA to pat the company on the head and say good job we wont bother you for a could of years now. I dont even believe they are more efficient or cleaner in the long run of use. If they are less a saw in terms of power and reliability then your going to use more fuel to get the job done or buy more parts because of failure witch is basically fuel in one way or another.

-Getting the job done in the least time and fuel efficient way along with the use of the simplest, least "break down" equipment is always the most economical on all levels.

There is zero doubt they are cleaner and more efficient.

 

[huskihl]

I’ll share it again for the guys that haven’t seen it. This is dominator at 32:1 in my ported 2153 after about 25 gallons of fuel. It goes to every gtg with me and cuts maybe half of my firewood each year

Almost 0 carbon. No buildup anywhere

 

[SawAddictedFarmer]

I’ll share it again for the guys that haven’t seen it. This is dominator at 32:1 in my ported 2153 after about 25 gallons of fuel. It goes to every gtg with me and cuts maybe half of my firewood each year

Almost 0 carbon. No buildup anywhere

View attachment 471695View attachment 471696View attachment 471697

Sweet! That looks pretty good!

 

[SawAddictedFarmer]

I just wanted to be absolutely sure before running it in a really expensive saw!
You all are awesome!