7 vs 8 pin on 660 & 461 - 20" bar

[redbull660]

660 7 vs 8 pin...

20" bar 3/8 .063 tsumura light n tough bar



wood - Poplar (just cut down, so not dry)
7 pin stihl RSLH 16.2 16.4
8 pin stihlRSLH 17.5 18.9

I figured for sure the 8 pin would do better. Instead it seemed a bit more grabby.

wood - dry red oak
7 pin stihl RSLH - 9.9 9.9
8 pin stihl RSLH - 10.1 10.3

again I figured for sure the 8 pin would do better.

switching to stihl RS (rapid super full comp)

running 8pin first cuz it's already on saw
wood - poplar
8pin stihl RS - 18.9 wtf ! lol
7pin stihl RS - 16.7


not sure what to think?!?!?. if 7 pin is better than 8pin at 20" what is the point to go to try it on a longer bar?

 

[redbull660]

461 7 vs 8 pin....




wood - oak
7pin RSLH - 13.4 13.2
8pin RSLH - 12.4 11.9

7pin RS - 10.6 10.6
8pin RS - 11.6 11.3

So interesting...

- RS faster than RSLH in both 7 and 8.

-but the 8pin was better with the RSLH. and 7 pin was better with RS.

 

[mdavlee]

The RS was more aggressive and took more power so it cut faster with the 7.

 

[Franny K]

Is popular tulip tree of the magnolia family?

We have real poplar around here I think it is white poplar.

 

[SAWMIKAZE]

I thought factory square chain was an upgrade ? opcorn:

 

[Spawn]

Wood is also popular around here. Dang that half skip was like waiting for a none to fart.

 

[SAWMIKAZE]

Whats a none ?

 

[big t double]

Nun maybe?

 

[Gypo Logger]

Be a nun, get nun.

 

[treesmith]

Is popular tulip tree of the magnolia family?

We have real poplar around here I think it is white poplar.

Tulip tree, tulip poplar are magnolia family, Liriodendron Tulipifera

Poplar is Populus

 

[MustangMike]

1) I preferred 7 pin on my ported 460 also. The 8 pin may be good for cutting cookies, but for real work I prefer the torque, and I think it cut at least as fast.

2) The square file he is using is half skip. I use full comp, and find it to be faster than RS.

It makes sense that the skip chain preferred the 8 pin, and everything else liked the 7 pin better. That is in line with my "seat of the pants" impressions.

Thanks again for the testing info, always good to have.

 

[MustangMike]

There are many types of Poplar, Yellow Poplar is also known as tulip (has tulip shaped leaves).

 

[MustangMike]

IMO, other than for racing or competition, most of us R just better off sticking with 7 pin, and full comp on bars 24" or less.

Skip chain is beneficial on the longer bars for 2 reasons: 1) It reduces the load on the saw, and 2) it will clear the chips better in big wood.

 

[blsnelling]

No surprise here. It takes a very strongly ported 90cc saw to be faster with an 8-pin when cutting good sized wood. Then you have the fact that the saw isn't as easy to operate, being more prone to bogging.

 

[Trx250r180]

all an 8 pin is going to do on a work saw is make it turn the clutch drum blue from the unneeded load

 

[redbull660]

Unless your running a Stihl 250 + 32" bar with a 9 pin Plitz racing sprocket!!!

 

[Trx250r180]

Results would vary per what powerhead it is on also ,nothing against your saw ,but mine sounds more powerful than yours .........

 

[SAWMIKAZE]

IMO, other than for racing or competition, most of us R just better off sticking with 7 pin, and full comp on bars 24" or less.

Skip chain is beneficial on the longer bars for 2 reasons: 1) It reduces the load on the saw, and 2) it will clear the chips better in big wood.

Mike what all have you ran skip chain in ? Round or square ?

 

[MustangMike]

I've got a loop of square skip, and I've run it at the GTGs on other saws, and I've run round skip on MechanicMatt's saw. I think he now prefers the full comp square file just like I do.

Plus, I pay attention to what people like Brian say about it, as he has a lot more experience than me, and I'm sure it is different if U cut the big trees out West instead of smaller hardwoods we have here.

I also talk with my local tree guy, he often uses skip just to make sharpening easier. I also let him run a few of my saws got get his feedback, and I take it all into account.

And then I apply logic, and that I'm good at that.

That said, if U disagree with anything I said, I'd like to hear about it, always willing to learn.

 

[redbull660]

Personally I think Rapid super (round ground) half skip/semi skip would be the bomb!

much smoother than full comp, faster than full comp (so far in my initial testing) ..makes sense too you have a righ and a left cutter taking a chip and then an open DL to clear the chip.

To me this makes more sense then full skip. you have a few more cutters to sharpen with half skip but quite a bit less than full comp.

WHYYYY stihl doesn't make it is beyond me!!!!!!!!!!