Another chainsaw dyno...

[Roadfxr]

Probably do good in a torque battle.

I would think my 7900 you did would fair well in the torque battle

 

[Nutball]

I'm starting to wonder now if my chinese 660 has any torque worth mentioning. I kind of doubt it because it hasn't had much work done to it, but you can lean on it pretty well.

 

[ayoungtexan]

How would an Echo 800P do in the torque department

 

[huskihl]

How would an Echo 800P do in the torque department

Joe and I were discussing this earlier. I think many confuse high torque with lack of hp.

 

[Deets066]

I think you’d want max torque closest to desired cutting rpm. I’d love to see peak torque at 10,000 rpm, but I don’t think that’s achievable.

 

[Bigmac]

A table flat torque curve, gives you great power everywhere with the motor continually wanting to gain RPM, having a torque peak near the cutting RPM or lower, and having a window as wide as possible would be ideal, imho

a flat 7 lbs of torque that didn’t end tell 12k would look really nice on the dyno

 

[ayoungtexan]

Joe and I were discussing this earlier. I think many confuse high torque with lack of hp.

I always considered torque to be associated with longer stroke and bigger cranks, thus meaning you could pull longer bars. And hp to be associated with high rpm. I also believe that you would need max torque and hp at whatever rpm the saw is running at under load. Then again, I’m no expert on this, so correct me if I’m wrong

 

[Time's Standing Stihl]

@Time's Standing Stihl

Yikes, not sure it can tackle that. Pretty impressive #s Keith

 

[Nutball]

I think you’d want max torque closest to desired cutting rpm. I’d love to see peak torque at 10,000 rpm, but I don’t think that’s achievable.

I kind of assumed racing saws had their peak torque near their ideal cutting rpm because of their peaky nature. Having the peak torque at the bottom of the useable RPM range allows for forgiving loading without it immediately stalling. My Echo 303t (reed valve) easily bogs below a certain relatively high rpm. I've imagined it as: with a decrease in rpm there's a decrease in power, but this saw doesn't have a sufficient increase in torque to stop the cycle of less rpm=less HP=less rpm...ect.

 

[Bigmac]

I always considered torque to be associated with longer stroke and bigger cranks, thus meaning you could pull longer bars. And hp to be associated with high rpm. I also believe that you would need max torque and hp at whatever rpm the saw is running at under load. Then again, I’m no expert on this, so correct me if I’m wrong

Torque is a force and hp is it’s relationship at rpm. Look at it as work, and how fast the work is done, it takes a certain amount of torque to do something, but how fast it gets done is hp, kinda.

 

[huskihl]

I always considered torque to be associated with longer stroke and bigger cranks, thus meaning you could pull longer bars. And hp to be associated with high rpm. I also believe that you would need max torque and hp at whatever rpm the saw is running at under load. Then again, I’m no expert on this, so correct me if I’m wrong

I’m no expert either. All I know is what I thought I knew but then I saw the dyno graphs that proved things differently. Saws that were supposed to be up in the 8 or 9 foot pound range that only scored 5. We are all still learning

 

[Deets066]

I kind of assumed racing saws had their peak torque near their ideal cutting rpm because of their peaky nature. Having the peak torque at the bottom of the useable RPM range allows for forgiving loading without it immediately stalling. My Echo 303t (reed valve) easily bogs below a certain relatively high rpm. I've imagined it as: with a decrease in rpm there's a decrease in power, but this saw doesn't have a sufficient increase in torque to stop the cycle of less rpm=less HP=less rpm...ect.

I don’t think all race saws are peaky at all. Maybe pipe saws

 

[Red97]

How would an Echo 800P do in the torque department

In the same ball park, I'll get a screen shot of max tq on my ported one.

I think you’d want max torque closest to desired cutting rpm. I’d love to see peak torque at 10,000 rpm, but I don’t think that’s achievable.

That would be some high hp stuffs. And keep moving the hp up the curve as well.

I’m no expert either. All I know is what I thought I knew but then I saw the dyno graphs that proved things differently. Saws that were supposed to be up in the 8 or 9 foot pound range that only scored 5. We are all still learning

Stupid dyno, it's supposed to answer all the questions.

I'm just gonna junk it....

Lol

 

[Deets066]

In the same ball park, I'll get a screen shot of max tq on my ported one.



That would be some high hp stuffs. And keep moving the hp up the curve as well.






Stupid dyno, it's supposed to answer all the questions.

I'm just gonna junk it....

Lol

So sensible

 

[Bigmac]

I think you’d want max torque closest to desired cutting rpm. I’d love to see peak torque at 10,000 rpm, but I don’t think that’s achievable.

My banshee torque peaks at around 9k

 

[Red97]

How would an Echo 800P do in the torque department

 

[Deets066]

My banshee torque peaks at around 9k

Hybrid was 8200
I think some of my smaller saws may peak pretty high too

 

[Red97]

My PayPal is

Josephis34@aol.com

Really appreciate it fellas.



What is the next grudge match?

 

[Miller Mod Saws]

I don’t think all race saws are peaky at all. Maybe pipe saws

Good job on the hybrid my man.

 

[Deets066]

Good job on the hybrid my man.

You know how she runs. Have fun with it