Another chainsaw dyno...

[Red97]

What did the 395 have done to it? Anything?

Sorry if I missed that. The 395 looks like it’s being choked for air. My bet is that the muffler needs to be modded badly.

As much as a Stihl guy I am, a 395 should walk all over an 066 in terms of overall power. In terms of weight and ergonomics, I’d take an 066 if I had to swing it all day. But for bucking big wood, the 395 really still is “The King”. Rarely seen a well done 066/660 beat any good 395 through big wood. The 066/660 are limited by their piston skirt width, and it seems that dual port saws (like the 394) always feel more brutal than the faster running quad port saws.

Just my $.02

All the normal stuff, just nothing as much as I would push now.

.020 off the base, set squish, raise ex and transfers back up, minimal widening, muffler mod and timing advance.

Have to see what a stock one does on the dyno, should be here any day now.

I was fully expecting a monster out of it and the 066 the way the owner talked about them. Loved the 066 with a 36" 8pin. Same with the 395, but that wore a 28 x 8

 

[Red97]

The 395 drop HP so steeply... Doesn't make sense.

A lot of that "drop" has to do where the saw tunes out.

The spike on the far right is where the "true" power starts.

Any thing to the right of the "spike" is just free rev/low load.

If I could load from low rpm to high the drop off would be more gradual.

 

[Red97]

I think the 661 shares the throne with the 395 ............. they can both be long bar monsters !

I might be able to get a stock one.

Have to ask when he drops his rollback truck off for some repair.

 

[ayoungtexan]

I think that for a while, the 395 used to be king with 7.1hp, even more so when ported. But I looked on the Husqvarna website, and the new 395’s have 6.6hp.

 

[Spladle160]

Maybe I missed it but is there or will there be some sort of a searchable database? It would be pretty darn cool to be able to pull up all the "stock" 361's and compare it to an average of all the ported 361's or stock 562's.

 

[qurotro]

I think that for a while, the 395 used to be king with 7.1hp, even more so when ported. But I looked on the Husqvarna website, and the new 395’s have 6.6hp.

EPA enters the chat.

 

[huskyboy]

EPA enters the chat.

This... and numbers provided can be rated in different ways and mean different things... as joe showed with the 620 having higher than “factory” hp. Paper specs aren’t a good thing to judge anything by really. Sometimes they can be a bit “fudged”.

 

[Red97]

Maybe I missed it but is there or will there be some sort of a searchable database? It would be pretty darn cool to be able to pull up all the "stock" 361's and compare it to an average of all the ported 361's or stock 562's.

Just whatever gets added here.

Once people start sending saws to me, that info will be up to the owner to share.

Some of the ones already posted give a real good idea of where things should be. Need to get a few 50cc marks. ...

 

[Deets066]

Once you get a pile of graphs, it would be cool to start a locked thread with dyno graphs only

 

[Red97]

Once you get a pile of graphs, it would be cool to start a locked thread with dyno graphs only

Could be possible. Just depends on how many want to share the data.

Your Hybrid in the mail yet?

I need something to hit 10hp.

 

[MustangMike]

With the variations I have seen in stock cylinders I would not expect them all to be close to the same Hp.

I think the new saws may be more consistent, but 044/440; 046/460 and 066/660 cylinders are all over the place with port timing and sometimes squish. As a result, I would expect to see large differences in the Hp produced by stock saws.

Even meticulously ported saws will sometimes have one that just runs better than another for no apparent reason.

 

[Red97]

With the variations I have seen in stock cylinders I would not expect them all to be close to the same Hp.

I think the new saws may be more consistent, but 044/440; 046/460 and 066/660 cylinders are all over the place with port timing and sometimes squish. As a result, I would expect to see large differences in the Hp produced by stock saws.

Even meticulously ported saws will sometimes have one that just runs better than another for no apparent reason.

I agree.

Be fun to actually see these on paper.

Ideally I would like to get 3 of the same popular models stock.

That would be close enough to compare too.

Just like the 046 yesterday. That is in the realm of what stihl claims. I would feel ok judging any 046 stock/ported against the 6.1-6.3 number.

 

[Lightning Performance]

Guessing by reading this last page the dyno room is going well. Wish you were closer to base line saws. Have a whole pile here of Stihl 1135 1128 1122... even the old 036 and three versions of the 362 that would be great to use. They will be ported and moved on before any gtg this summer.
My 066 needs to be timed. I'd suspect it's an old dealer replacement jug with a plugged decomp under the flat top. My best stock runner. Pulls long bars very well.

 

[Lightning Performance]

There were huge production tolerance differences in the o66/660s Have personally seen .019-.035 squish In completely stock saws, and compression ranging from 145 to 175 on perfectly fresh saws, Those factories saws at .019 175 psi are pretty darn good runners

Odd you say that as I back up a page. Most of the 660 I've run are turds. Kept the best two I found over the years. One is a good runner. The other is much better. All still stock.

 

[Lightning Performance]

I wish I had trees to justify a 10mm 044.

I wish I could run one. All damn year it's been 35cc or less. Yesterday I emptied seven saws some more than once. No milling just killing and bucking big stuff. A few short climbs for dead limbs.
It was nice to run everything all in a day. The bow got to eat and that 66 with a 28" 8 just makes you smile. I tuned it near maybe 14... damn does that saw go. People came out on several golf carts from around the resort park.
Wish you could dyno that saw but It can't leave me sight. Maybe this fall.

 

[Duane(Pa)]

An 044 would be considered overkill for the size wood that I cut, usually around 14” diameter

Same here. Just noodle it!

 

[Bigmac]

Same here. Just noodle it!

Or put a 9 pin on and make a mini light saber! 18” bar

 

[Duane(Pa)]

Guessing by reading this last page the dyno room is going well. Wish you were closer to base line saws. Have a whole pile here of Stihl 1135 1128 1122... even the old 036 and three versions of the 362 that would be great to use. They will be ported and moved on before any gtg this summer.
My 066 needs to be timed. I'd suspect it's an old dealer replacement jug with a plugged decomp under the flat top. My best stock runner. Pulls long bars very well.

Who’s porting the 362’s? I have heard they’re fat and weak outta the box. I have no first hand knowledge

 

[cuinrearview]

Joe how far are you from Springport? I'll be up there Sunday. I'd like to get a couple saws to you soon.

 

[Red97]

Joe how far are you from Springport? I'll be up there Sunday. I'd like to get a couple saws to you soon.

20 mile/ 30 min ish.

Might be having a mini dyno day Sunday already. ...