Another chainsaw dyno...

[Red97]

true. I can bring the avatar saw if you want...

Gonna need a bigger hose.

And remember to push the button.

 

[Duane(Pa)]

That’s also in the Book of Excuses: Hose too small...

 

[Red97]

Let's simmer down now..

I'm getting ready to repack all if these saws. Over the next couple days. If any of the owners want something checked let me know.

 

[David Young]

Thank you Joe

 

[David Young]

I would love to take one saw like the 365 and move the timing in stages to see what it looks like on the dyno.
95 120 75
95 120 80
100 120 75
100 120 80
105 125 75
105 125 80

just as an example

 

[markds2]

Joe, @Red97, have you seen a ported 288xp on the dyno yet? If so, I'd very interested in the peak HP and Torque figures.

 

[Red97]

I would love to take one saw like the 365 and move the timing in stages to see what it looks like on the dyno.
95 120 75
95 120 80
100 120 75
100 120 80
105 125 75
105 125 80

just as an example

That sure looks like a lot of work....

But I do have something in the works...

Joe, @Red97, have you seen a ported 288xp on the dyno yet? If so, I'd very interested in the peak HP and Torque figures.

No, not yet. Just a stock one.

 

[markds2]

That sure looks like a lot of work....

But I do have something in the works...



No, not yet. Just a stock one.

Yes, and it was very impressive alongside the stock 395, wasn't it.

 

[Red97]

I am going to change gears here just a bit...



Have A couple of saws to get built, and fondled. See if this big echo can hold a candle to the 880/3120...

Plan on doing progressive mods. And dyno runs just to see how it pans out.

Port no machine work
Add machine work change porting
Timing advance
Carbs

Etc

Kind of a step by step just to see.

Also I plan to try and make a big bore for this too...

66mm jug looks promising.

Once all these saws are shipped back I am going to hold off on mail in runs for a bit.

If people want to make the trip for a saw or 2 that can possibly be arranged.

Plenty of targets for people to strive for now. Maybe by the end of the month (August) if people are still interested we can do another mail in batch.

Have A few weeks worth of real work I have to go do, and don't want to be sitting on a pile of saws if it drags out. Much like this last round.

Still plan on sharing the builds/runs as much as I can.

 

[mgr1]

Is there much port timing difference between a oem 3120xp and the oem echo 1100?

 

[Red97]

Is there much port timing difference between a oem 3120xp and the oem echo 1100?

Not sure...

On this 1200 I have
.015 gasket
.043" squish
In 74.5
Ex 99
Tr 122

Not sure where a 3120, or 880 are.

 

[mdavlee]

Not sure...

On this 1200 I have
.043" squish
In 74.5
Ex 99
Tr 122

Not sure where a 3120, or 880 are.

That’s not too awful far from a 3120 stock.

 

[Bigmac]

I am going to change gears here just a bit...

View attachment 251269

Have A couple of saws to get built, and fondled. See if this big echo can hold a candle to the 880/3120...

Plan on doing progressive mods. And dyno runs just to see how it pans out.

Port no machine work
Add machine work change porting
Timing advance
Carbs

Etc

Kind of a step by step just to see.

Also I plan to try and make a big bore for this too...

66mm jug looks promising.

Once all these saws are shipped back I am going to hold off on mail in runs for a bit.

If people want to make the trip for a saw or 2 that can possibly be arranged.

Plenty of targets for people to strive for now. Maybe by the end of the month (August) if people are still interested we can do another mail in batch.

Have A few weeks worth of real work I have to go do, and don't want to be sitting on a pile of saws if it drags out. Much like this last round.

Still plan on sharing the builds/runs as much as I can.

That’s going to be a cool build, the numbers looks better than I would have guessed. What carb is on the echo? Venturi size?

 

[Red97]

That’s going to be a cool build, the numbers looks better than I would have guessed. What carb is on the echo? Venturi size?

Sdc

17mm ish

 

[ayoungtexan]

I am going to change gears here just a bit...

View attachment 251269

Have A couple of saws to get built, and fondled. See if this big echo can hold a candle to the 880/3120...

Plan on doing progressive mods. And dyno runs just to see how it pans out.

Port no machine work
Add machine work change porting
Timing advance
Carbs

Etc

Kind of a step by step just to see.

Also I plan to try and make a big bore for this too...

66mm jug looks promising.

Once all these saws are shipped back I am going to hold off on mail in runs for a bit.

If people want to make the trip for a saw or 2 that can possibly be arranged.

Plenty of targets for people to strive for now. Maybe by the end of the month (August) if people are still interested we can do another mail in batch.

Have A few weeks worth of real work I have to go do, and don't want to be sitting on a pile of saws if it drags out. Much like this last round.

Still plan on sharing the builds/runs as much as I can.

I think the torque curve (and build quality) on the 1100 will be better, but not as good max hp

 

[jk14]

Late start. Had to get the pig barn cleaned.

View attachment 251068

Did the 661 spin the rollers yet? Was looking forward to seeing those numbers, if they were being shared that is. I totally understand that some folks may not want to publish their numbers though.

Anyway, keep up the good work. I'll keep an eye out for your next round of "mail in dyno days", I've got a couple here I want to send in.

 

[huskihl]

Did the 661 spin the rollers yet? Was looking forward to seeing those numbers, if they were being shared that is. I totally understand that some folks may not want to publish their numbers though.

Anyway, keep up the good work. I'll keep an eye out for your next round of "mail in dyno days", I've got a couple here I want to send in.

I didn’t talk to Scott about sharing the graph yet. Doubt he’d care, but....

 

[jk14]

I didn’t talk to Scott about sharing about sharing the graph yet. Doubt he’d care, but....

Good deal, I'd do the same. Ultimately it should be left up to the builder/porter as to whether they want to share the numbers or not. Carry on.

 

[dustinwilt68]

Not sure the numbers but a TM661 is a saw to be reckoned with for sure! I remember running a few from 2 yrs ago yet, amazing power.

 

[Time's Standing Stihl]

Is the builder/porter paying for shipping/return shipping, along with dyno time ????

Or is the owner of the saw???


Imo, the answer to the question above should have the say if their graphs get posted.

If you are afraid of the truth, don’t send it. Simple