ported 661 - testing 7 and 8 pin .404

[Redbull661]

trying some different combos in .404 7 and 8 pin @ 28".

 

[Keith Gandy]

No more of a difference in speed as that is I would take full skip just for clearing chips noodling but thats because I noodle alot

 

[Keith Gandy]

Which one self feeds best and was smoother?

 

[Chainsaw Jim]

This is a good example of why I stopped running an 8 pin on larger wood. It's close enough to call the same cutting speed but there's more lug with the 8 pin. Limbing and smaller wood is where the 8 pin really shows its advantage.
I prefer full comp too. You can straighten up the sides of the rakers if you're having binding or chip clearing problems.

 

[Moparmyway]

I noticed better fuel mileage with a 7 tooth and I also saw reduced clutch wear with the 7 tooth as well

 

[Redbull661]

7 or 8 rs or 8 on the full skip - they all work real nice.



At 28" this particular saw has the balls to pull 8pin .404 RS full comp is faster than 7pin.
At 36" this particular saw the 7pin .404 RS full comp is just slightly better on the speed and better on the torque.

In 3/8ths I think I'd have to run 9pin full comp to realize the full potential...maybe even at 36".

I ran a lessor ported 661 with the 28" .404 RS right after this one in the same log. 7pin was faster than 8pin. So that particular saw obviously didn't have as much power.

point - I think it depends on the saw.

 

[mdavlee]

Less than a 5% difference in cut times from 7 to 8 on the RS. I'd stick with the 7 just to save wear on the clutch.

 

[VinceGU05]

we have problems with the clutches holding on downunder.. they have downsized them from the 660. more grunt, smaller clutches equals not good mate!

 

[Chainsaw Jim]

At 28" this particular saw has the balls to pull 8pin .404 RS full comp is faster than 7pin.

3 tenths of a second difference is basically the same exact speed when it comes to a chainsaw cutting a round of wood for non-competition. I predict the same saw will cut faster in bigger wood with the 7 pin.

 

[Deets066]

7 or 8 rs or 8 on the full skip - they all work real nice.



At 28" this particular saw has the balls to pull 8pin .404 RS full comp is faster than 7pin.
At 36" this particular saw the 7pin .404 RS full comp is just slightly better on the speed and better on the torque.

In 3/8ths I think I'd have to run 9pin full comp to realize the full potential...maybe even at 36".

I ran a lessor ported 661 with the 28" .404 RS right after this one in the same log. 7pin was faster than 8pin. So that particular saw obviously didn't have as much power.

point - I think it depends on the saw.

3/8 - 9 pin is bigger than 404 8.

You saw has plenty of power to pull 3/8 - 9 pin at 36" bar. But it's hard on everything

 

[Brewz]

I tried my 066 with an 8 pin and 404 Stihl RS on a 25" bar and it stretched the chain.

I have used it a lot with a 7 pin and the difference I noticed in hardwood noodling was that it was spinning so fast I had to push it into the wood to really get it cutting

 

[Brewz]

But when it really bit in, the noodles were landing 20 feet behind!

I will agree with the above comment saying the speed difference is negligible when cutting fire wood in big timber.
I find a 7 pin better due to less vibration, less load on the clutch and chain, better throttle response, increased torque.

The 8 pin would work well in smaller timber but I no longer bother, even with 3/8 chain due to the extra discomfort that comes with a couple 10th's of a second faster cut.
Plus we dont have much in the way of soft timber here, its all hard unless you are pruning roses.

 

[Stihl working Hard]

I noticed better fuel mileage with a 7 tooth and I also saw reduced clutch wear with the 7 tooth as well

+1 same here

 

[Stihl working Hard]

3/8 - 9 pin is bigger than 404 8.

You saw has plenty of power to pull 3/8 - 9 pin at 36" bar. But it's hard on everything

Couldn't agree more there

 

[Brewz]

Yep
At what point does a couple percent faster cut time become a good trade off for increased wear and stress on the saw and user?

I have a .325 9 pin sprocket and have not used it, but one day I plan to fit my little 16" 325 bar up to my 066 with the 9 pin and see what it will do

In Aussie hardwood, I recon it will cut as fast as it goes blunt!

 

[Moparmyway]

Yep
At what point does a couple percent faster cut time become a good trade off for increased wear and stress on the saw and user?

I have a .325 9 pin sprocket and have not used it, but one day I plan to fit my little 16" 325 bar up to my 066 with the 9 pin and see what it will do

In Aussie hardwood, I recon it will go blunt faster than it cuts !

Fixxed it for ya !!!

 

[Deets066]

Lol

 

[Brewz]

Haha yeah that's what i meant

I will have to test it