Saw video thread

[RI Chevy]

We in a different thread???

 

[Hedgerow]

Hot damn!!!!

I’ve run one of Scott’s 440 arctics...

They’ll hang in any 5 cube class..

 

[rogue60]

Right...moving parts only need so much lube....no sense over doing it.

Actually more oil = more power in a two stroke it's well documented with years worth of dyno runs on all kinds of two stroke engine's.
There is a long list of benefits running higher oil ratios apart from the obvious like better ring seal no blowby less wear on moving parts it also helps stabilize fuel etc..
More oil isn't waisted there is a myth that the more oil you put in fuel the less power that fuel will make but most modern 2T oil has little effect not worth worrying about with the better ring seal you pick up more pulses than minus. You actually make less power in a two stroke the less oil in the fuel less ring seal and more blowby wasted compression.
Of course all this is meaningless if the engine is not tuned correctly an engine running on 32:1 will burn as clean as an engine running 50:1 if tuned correctly.
It also depends on the type of oil run as well some don't perform well in a saw power head some do I'm not getting into bike oils am talking basic two stroke oil.

I also found the few autotune mtronic saw's I've run they don't tune well with more oil seem to run best on 40:1-50:1 with it's set tuning.
Would be good to run a autotune mtronic saw on a dyno at 50:1 then swap in a tunable carby and run it with a mixers from 50:1 40:1 32:1 down to 25:1 that would be interesting to see the results..

 

[redlight066]

Went back in and did some more work on the uppers. That’s more like it

 

[huskyboy]

Went back in and did some more work on the uppers. That’s more like it

Limited coil?

 

[redlight066]

Limited coil?

Someone smarter than me needs to answer that. Original coil to the saw (two leg). I’ve seen three leg coils on this model. Maybe those are limited. Maybe they both are.
I don’t tune with a tach. Just tune under load and wherever it lands... is what it is

 

[huskyboy]

Someone smarter than me needs to answer that. Original coil to the saw (two leg). I’ve seen three leg coils on this model. Maybe those are limited. Maybe they both are.
I don’t tune with a tach. Just tune under load and wherever it lands... is what it is

Yours sounded limited to me. I believe all 461’s are 13,500rpm limited coil. At least the ones that have been in my hands are. Not really a problem though since you tune it properly under load, since it probably wants to run past the limiter after you ported it.

 

[redlight066]

Yours sounded limited to me. I believe all 461’s are 13,500rpm limited coil. At least the ones that have been in my hands are. Not really a problem though since you tune it properly under load, since it probably wants to run past the limiter after you ported it.

Runs past the stock carb as well. Drilled the jet out to a 70.

 

[Definitive Dave]

I missed

 

[David Young]

Idk. Lower exhaust than most 80cc saws probably. I believe the snappiness is due to the injector being mounted within an inch of the piston

What numbers stock?

 

[David Young]

I missed

At least you stepped up to the block to miss...

A bad day racing is better than a good day at work.

 

[TreeLife]

A bad day racing is better than a good day at work.

Amen

 

[huskihl]

What numbers stock?

104 120 84

 

[huskihl]

 

[RI Chevy]

Came out nice Kevin!!!

 

[TreeLife]

It rips, I love it!!!

 

[rogue60]

Just thinking outloud a pipe on a two stroke has to get up to it's operating temp for it to be efficient same as the engine. KTM race team years ago picked 2 or 3hp in there 125's running exhaust heat wrap on there pipes something about holding more heat in the pipes made them more efficient doing it's job.
I wonder if wrapping a pipe with heat wrap on a pipe saw would help get heat in the pipe especially since they only do short runs?
Like I said just thinking out loud in the race saw world everyone is looking for more gains if I owned a pipe saw I'd try it myself it maybe a waste of time or not? you dont learn anything without hands on real word experimenting.

 

[TreeLife]

A thermodynamics discussion?! Whaaaat....

 

[rogue60]

It had me thinking watching vids of pipe saw's I'm sure most of the owner's warm them up before making vids? but you see a lot still stumble and seem cold to me on start up it looks like the pipe has lost to much heat not the engine and they have to blip em for abit to get some heat happening in the pipe these saw's would be tuned for a hot engine and hot pipe not tuned for a hot engine and cold pipe.
I may be way off?

 

[Dub11]

You crafting peace pipes now?