Saw video thread

[awol]

Have you ever heard of "blueprinting" or "balancing" a four-stroke racing engine? I have done it, and it involves weighing the pistons and making the counterweights on the crank match the weight of the pistons, as measured by the balancing machine.
The amount by which we change a saw piston is almost inconsequential at the speed which it runs; try it on saw with no anti-vibe though, and you will have a different view.

 

[awol]

The flywheel weights are opposed to the crank throws and that is what balances it.

How do you explain the EXTREME imbalance in a naked crank then?

 

[jmssaws]

How do you explain the EXTREME imbalance in a naked crank then?

Put the flywheel on it

 

[CR500]

You have heat in your shop J?



Sent from my non internal combustion device.

 

[jmssaws]

Have you ever heard of "blueprinting" or "balancing" a four-stroke racing engine? I have done it, and it involves weighing the pistons and making the counterweights on the crank match the weight of the pistons, as measured by the balancing machine.
The amount by which we change a saw piston is almost inconsequential at the speed which it runs; try it on saw with no anti-vibe though, and you will have a different view.

Yes I've built many race motors and have had lots of them balanced,there multiple cylinder motors with multiple pistons.
A single cylinder engine is balanced by the flywheel. It is externally balanced
Piston weight has absolutely nothing to do with it.

 

[jmssaws]

You have heat in your shop J?



Sent from my non internal combustion device.

Yeh It's a balmy 38 degrees in the shop
13 degrees outside

 

[awol]

There may be exceptions, but every saw flywheel I have had on the balancer is statically balanced; it spins smoothly on its own, is not in any way responsible for balancing the rest of the assembly.

Unlike a Chevy sb400!

 

[jmssaws]

There may be exceptions, but every saw flywheel I have had on the balancer is statically balanced; it spins smoothly on its own, is not in any way responsible for balancing the rest of the assembly.

Unlike a Chevy sb400!

OR a 454.

 

[awol]

Yup, and a couple Ferds!

 

[jmssaws]

Yup, and a couple Ferds!

I don't know anything about a Ford.
Takes to many tools and to many different parts to work on them.

 

[MustangMike]

289, 302, Boss 302, 428 CJ all had some external balancing on the flywheel. 390 & 427 did not, which is why they held together better! The balancing on the external was a combination of the crank counter weight & the flywheel imbalance.

 

[Deets066]

It was 76 here today. Crazy

Not so nice here today

 

[Frank bierce]

View attachment 45297

Not so nice here today

What kind of ford you have Deets?

 

[Deets066]

What kind of ford you have Deets?

2016 F-250 6.7L

 

[Frank bierce]

2016 F-250 6.7L

Very nice..I have a 2013 f-350.

 

[RI Chevy]

I don't know anything about a Ford.
Takes to many tools and to many different parts to work on them.

I heard the bolts fall out of Fords. Lol
Only kidding. I don't want to ruffle anyone's feathers.

 

[Chainsaw Jim]

How do you explain the EXTREME imbalance in a naked crank then?

Probably to keep the piston returning back to tdc without losing momentum. And the piston acts more as a vibration damper than a balancer?

 

[dolmarkid]

-17 was that the air temperature or windchill factor

 

[Deets066]

-17 was that the air temperature or windchill factor

Regular temp, add 10 mph wind to that

 

[Brewz]

Beer drinkin weather here