Another chainsaw dyno...

[TreeLife]

Well I think the dolly broke it again....

Going to call in the am and see if they have any warranty on the arm I just replaced.

Not having awesome luck with the dyno, aye Joe?

 

[ranchdadmike]

Well I think the dolly broke it again....

Going to call in the am and see if they have any warranty on the arm I just replaced.

Sorry man. Your hard work and dedication aren’t going unappreciated and your patience is commendable.

 

[dustinwilt68]

Figured I would post this in here due to more traffic, mean green is no longer suitable for cleaning parts, it was sold to Rust-Oleum and they changed the chemical makeup. It will corrode alluminum now I will post pics of what it does and the new jug and old, the front of the jug looks identical to the old.

 

[Red97]

Just some speculation here...

I believe you said the unit is rated for 30hp and a bunch of rpm... but...
Is there a spec for max torque?

I'd guess it doesn't care as much about hp as it does about torque.
When the input is geared 2-1, the torque applied to the arm is doubled.
I think the typical application for the land & sea unit is running directly off the crank.

Not sure how abruptly you can slow a saw down with the valve setup but I know on the disc brake dyno it was possible to get really large spikes in torque if the brake was a bit overly applied, like 4-5 times the saws rated output.

Then again maybe it's just seeing some bad vibe/harmonics, that sort of thing is really difficult to ferret out.

No real "spikes" with the valve. Rather smooth.

Rated for 30hp I'm thinking 30ftlb too they have. A high tq option that is for 60ftlb.

I think it almost has to be a noise/vibration. I'll give them a call and see what they say.

Now that the setup is "right" I hoped it would last longer.

 

[ranchdadmike]

Figured I would post this in here due to more traffic, mean green is no longer suitable for cleaning parts, it was sold to Rust-Oleum and they changed the chemical makeup. It will corrode alluminum now I will post pics of what it does and the new jug and old, the front of the jug looks identical to the old.View attachment 255299 View attachment 255300 View attachment 255301

Crap. I just bought some...

 

[dustinwilt68]

Hope it's still the old version

 

[dall]

How am I supposed to stir these guys up w facts like that.lol

lol facts ? look at the top 90cc saws

 

[dustinwilt68]

lol facts ? look at the top 90cc saws

Very inconclusive so far, not enough saws tested to draw a good comparison yet. More data is needed yet.

 

[dustinwilt68]

I would love to see one of Julian's TM 661s on there, I think for a standard stroke saw its gonna be up near the top. A few different 395s will be interesting to.

 

[dall]

Very inconclusive so far, not enough saws tested to draw a good comparison yet. More data is needed yet.

yet you say husky is on top ? and yet only one 395 ran
My 066 was at 11.4
Where do you think your 395 will be? cfb 880 was over 13

 

[dustinwilt68]

No clue where it will be, either way I built it and am proud of it, we can put them in wood sometime and see which one comes out first, was gonna send it out this Tuesday but we will have to see if Joe can get the dyno fixed first

 

[cuinrearview]

No clue where it will be, either way I built it and am proud of it, we can put them in wood sometime and see which one comes out first, was gonna send it out this Tuesday but we will have to see if Joe can get the dyno fixed first

Dustin I'd love to meet you and run the T4 2156. Any chance you could make it up to Kevin's? It's looking to be quite the swaray.

 

[dustinwilt68]

I wish I could, but my vacation was booked in January, I took off the second week of October for the gtg in TN. I be happy to send you either my 357 or the t4 2156, I would say booth are fairly equal, the t4 5105 is probably the fastest woods 50cc saw I have ran, props to Mike on them.

 

[cuinrearview]

I wish I could, but my vacation was booked in January, I took off the second week of October for the gtg in TN. I be happy to send you either my 357 or the t4 2156, I would say booth are fairly equal, the t4 5105 is probably the fastest woods 50cc saw I have ran, props to Mike on them.

@PA Dan promised to bring me a T4 5105 to try. I'll wait to try one of your 57s when we meet eventually.

 

[PA Dan]

@PA Dan promised to bring me a T4 5105 to try. I'll wait to try one of your 57s when we meet eventually.

Hopefully but maybe not! I'll have a driller 346 and 359 for sure!

 

[RI Chevy]

Dang husky and Dolly's always breaking the dyno, guess we know what makes the power

Well. The Hooskies Break before going on the DYNO. So...no Hooskies breaking the DYNO. There is usually a Hooskie fix it table set up at GTGs.
STIHLS usually out cutting wood and stuff. Just sayin...LMFAO

 

[RI Chevy]

I could have sworn I read that a Stihl 661 was run already on the DYNO a while back.
But I never saw the graph.

 

[dustinwilt68]

Well. The Hooskies Break before going on the DYNO. So...no Hooskies breajing the DYNO. There is usually a Hooskie fix it table set up at GTGs.
STIHLS usually out cutting wood and stuff. Just sayin...LMFAO

Must be the Stihl clean my air filter table.

 

[RI Chevy]

LMAO. Good one...[emoji16]
BUT after cutting several trees down. AND FAST...LOL

 

[Armbru84]

Well. The Hooskies Break before going on the DYNO. So...no Hooskies breajing the DYNO. There is usually a Hooskie fix it table set up at GTGs.
STIHLS usually out cutting wood and stuff. Just sayin...LMFAO

Pretty sure the strongest saw on the dyno so far was a hooskie...by a long shot.