Another chainsaw dyno...

[Red97]

I upgraded my dyno from a dial scale to an electronic one.

I did test the dial scale for accuracy with a known weight and it was good.

The issue with it is the pump pulsing making the needle jump a little making me try and guess just what the number might be.

With the new scale on, the the dyno is now very smooth and the scale number is on point.

Turns out I was right on with my guessing with only 2 of the scale numbers for each x1000 rpms being off by .1.

Also the dial scale is KG and it’s another set of numbers I would have to calculate to get Ft/Lbs.

New scale is pounds, kilograms and newtons.

View attachment 309156 View attachment 309157

What is your centerline distance ? From the pump rotation point to scale attachment point?

How long of a lever/arm are you using?

 

[Dieselshawn]

Red97

It’s about 12 inches to make it 1 foot for each pound.

Then I divide the gear ratio from saw to shaft by 4.

 

[huskihl]

Play saw/ gtg thingy. 48mm 65cc cylinder, RWJ carb
@farminkarman

 

[PA Dan]

Play saw/ gtg thingy. 48mm 65cc cylinder, RWJ carb
@farminkarman

View attachment 310145

What cylinder...?

 

[huskihl]

What cylinder...?

Oem 365

 

[Wolverine]

Oem 365

8.5 horse from 65cc. Impressive Kevin.

 

[farminkarman]

Play saw/ gtg thingy. 48mm 65cc cylinder, RWJ carb
@farminkarman

View attachment 310145

This thing ought to make the chips really fly

 

[huskihl]

8.5 horse from 65cc. Impressive Kevin.

Thanky

 

[ferris]

881 second run with muff mod?

 

[Red97]

881 second run with muff mod?

Not yet

 

[TreeLife]

Not yet

Almost wish the 592 went to the dyno first. Almost

 

[Dieselshawn]

Almost wish the 592 went to the dyno first. Almost

That will happen. As soon as the 592 is available.

My logger friend is supposed to get one to demo for the dealer when they come.

The dealer ordered 3 of them 592’s

We have plans for that to happen and I’m sure Red97 is excited to get his hands on one.

 

[TreeLife]

That will happen. As soon as the 592 is available.

We have plans for that to happen and I’m sure Red97 is excited to get his hands on one.

One is en rout to Mr Evans as we speak. We shall see!

 

[Dieselshawn]

One is en rout to Mr Evans as we speak. We shall see!

That’s good.

 

[ferris]

Not yet

Do u plan a run with minor mods only?

 

[Red97]

Do u plan a run with minor mods only?

Probably not. I'm going to try and get it done and back to its owner. Baby is due Thursday, will be taking a few weeks off.

 

[Dieselshawn]

I can see 2 years from now, the 2 year old Red97 Playing with the dyno

 

[Red97]

I can see 2 years from now, the 2 year old Red97 Playing with the dyno

We will see. Her older brother likes to run saws on the dyno at times. Maybe she will too

 

[srcarr52]

We will see. Her older brother likes to run saws on the dyno at times. Maybe she will too

She will quite likely be able to out weld you. So be prepared to be humbled.

 

[Red97]

She will quite likely be able to out weld you. So be prepared to be humbled.

I hope so.

I bought her a dyno so she wouldn't have to share.

Um thinking clutchless 4t/2t kart stuff.
Set up a nice v8 electric start. Usr the same data system.

Her and her brother can see who makes more power per cc lol