Do stihls have more torque than husqvarna in general?

[Chris-PA]

I just can't resist. It take compression to make RPM=Power.Lower compression longer stroke slower RPM makes torque plane and simple. My O41 is a prime example.This saw has145lbs of compression is a slower RPM than say my 51 but pulls a 20BC with ease.Like comparing a 390 ford to a 327 Chevrolet.Ken

In 4-strokes, the whole long stroke=high torque myth reverses cause and effect. Long stroke engines had good low rpm torque because they were tuned that way - that in turn was because the long stroke mechanical forces combined with the smaller valves due to small bore prevented them from revving, so tuning for low rpm grunt made sense. And a lot of that goes back to British tax law, which based taxes only on bore, not displacement, so naturally they made silly long stroke engines. Other things like poor lubricants and good valve trains made high rpm a difficult design problem too.

It's true that longer crank arms give better leverage, but if you look at an cylinder as a pneumatic piston, a bigger bore means more piston area and more force.

 

[treesmith]

F1 V8 engines are wide bore short stroke, 18,000rpm or so, 2.4 litres or 146.5 cubic inches

 

[Stihl 041S]

In 4-strokes, the whole long stroke=high torque myth reverses cause and effect. Long stroke engines had good low rpm torque because they were tuned that way - that in turn was because the long stroke mechanical forces combined with the smaller valves due to small bore prevented them from revving, so tuning for low rpm grunt made sense. And a lot of that goes back to British tax law, which based taxes only on bore, not displacement, so naturally they made silly long stroke engines. Other things like poor lubricants and good valve trains made high rpm a difficult design problem too.

It's true that longer crank arms give better leverage, but if you look at an cylinder as a pneumatic piston, a bigger bore means more piston area and more force.

But short stroke/big bore makes for higher RPM........
I don't care. Just needs a slight derail.

 

[nk14zp]

It depends on the brand of oil.

And the ratio.

 

[Stihl 041S]

F1 V8 engines are wide bore short stroke, 18,000rpm or so

What he said!!!!!

There is a good read on another forum about the electric motor developed for testing F1 transmissions.
980hp
Idle RPM to 21,000 in 20 milliseconds.
14"x20"
$3million for motor and controller.
F1 was happy.
Cheaper than real F1 engines at a Gazillion each.

 

[Stihl 041S]

F1 V8 engines are wide bore short stroke, 18,000rpm or so, 2.4 litres or 146.5 cubic inches

Thank God for "Ducky". RIP

 

[Stihl 041S]

And the ratio.

You quit the fight thread?

 

[SawTroll]

There is no such thing as more torque above the max power rpm, both hp and torque fall of fast when above the rated RPM and torque will increase some as the RPM drops below the max power RPM, To me the smaller Husky saws lose torque real fast as the rpm drop making them finicky to run also called a narrow power band. Steve

How fast torque and power fall off above max power rpm varies a lot - and it is a big factor in a lot of cutting.

 

[mountainlake]

Both hp and torque do fall off fast above the rated RPM, I like saws where the torque picks up quite a bit when the RPM drops a little making a more user friendly saw. If you only cutting 2" limbs that extra RPM might help due to rotational force but anything much bigger requires actual power and torque. When cutting real wood saws should be run at the rated max HP rpm but it's nice if they don't fall flat on their face if the RPM drops 300 rpm as small Husky saws do. Steve

 

[Mastermind]

Those small Huskys do a hell of a lot better after we get done with them.

 

[Stihl 041S]

I hate it when torque AND Rpm drop ........
along with your saw.........
from a bucket......
.into the creek.......
at night........
while it's snowing.......

And I had soap in my eyes!!!!!!!

 

[Stihl 041S]

Those small Huskys do a hell of a lot better after we get done with them.

My Stihl from you has more torque!!!! Lol

A 4' bar just makes it easier to handle.

Between 4' and 5' bar there is little difference cutting.

Thanks again Ol Buddy. That OH-NINE-OH is awesome.

 

[Ironworker]

I ran 5 different saws this weekend , stock, ported, mm, Stihl and Husky and other than tiny differences, they were all fun to run.
<iframe width="420" height="315" src="//www.youtube.com/embed/88u5YH9bB9c" frameborder="0" allowfullscreen></iframe>

 

[farmer steve]

My Stihl from you has more torque!!!! Lol

A 4' bar just makes it easier to handle.

Between 4' and 5' bar there is little difference cutting.

Thanks again Ol Buddy. That OH-NINE-OH is awesome.

that 5' bar is a beast. even off the saw.

 

[RandyMac]

But short stroke/big bore makes for higher RPM........
I don't care. Just needs a slight derail.

The Ford 200 in-line six has a 3.126" stroke and 3.68" bore, low rpm, high torque.

You shoot holes in anybody's "facts"

 

[Deets066]

My Stihl from you has more torque!!!! Lol

A 4' bar just makes it easier to handle.

Between 4' and 5' bar there is little difference cutting.

Thanks again Ol Buddy. That OH-NINE-OH is awesome.

what are you running for a sprocket? I just threw a 10 pin in my ported 090, 50" bar no problem

 

[Stihl 041S]

The Ford 200 in-line six has a 3.126" stroke and 3.68" bore, low rpm, high torque.

You shoot holes in anybody's "facts"

Crips Randy. That's near square.

What great "facts" are you talkin about.

VW vans had 66 stroke 90 bore. Had better rpms easier.

Why you so upset? Read the whole post.

It's not that serious. If it was look at container ship engines.

Long stroke.

Have a good day.

 

[RandyMac]

Upset? You obviously don't know me...LMAO!!

You talking about that pancake VW, the design borrowed from the 914? The rev the piss out of, to get in your own way engine?
Not a good example.

 

[RandyMac]

Ford 200 inline six shoot holes in pan lol

only when operated beyond reasonable rpm ranges.

 

[Stihl 041S]

Upset? You obviously don't know me...LMAO!!

You talking about that pancake VW, the design borrowed from the 914? The rev the piss out of, to get in your own way engine?
Not a good example.

God I am SOOO easy........lol

I get hooked when people take threads seriously......then I did.

I'll have to squat to pee for a week.

Hey Randy.