661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[porsche965]

In chainsaw racing what chains do they use?

 

[mdavlee]

Square chisel.

 

[Moparmyway]

it has a slightly taller cutter ,and a little wider kerf ,looks like this ,this is round ,the skip i have is square ,i convert the round to square on the grinder

I know where you got those !!
My pile from the same guy looked very similar when I got them ......I think I got about 20........ now they are all on nails. The 36" loops took forever to square file

 

[bwalker]

If done properly ,it is like adding 10cc's to your saw for power ,it is also much smoother ,not as hooked as a round profile ,so not grabby .

3/8 off the grinder ,(yes moparmyway ,i know the gullets are not cleaned out )
View attachment 447394

I found that square is pretty smooth in hardwoods, but also dulls much faster than round.
Probaly great stuff for cutting softwoods.
Speaking of softwoods. I snapped these pics of an old growth eastern white cedar and a old growth white pine. The cedar was close to 36"dbh and the white pine was quite a bit bigger.

 

[mdavlee]

I get longer life out of square than round. We milled with a 37" skip square yesterday on a 394. Jason had bought some R50 and it was smelling good around that wood pile with that and the VP fuel Rodney had.

 

[Moparmyway]

I found that square is pretty smooth in hardwoods, but also dulls much faster than round.
Probaly great stuff for cutting softwoods.

I cut hardwoods; red oak, hickory, even locus ............... square lasts me longer than round filed

 

[bwalker]

I cut hardwoods; red oak, hickory, even locus ............... square lasts me longer than round filed

Interesting, maybe my filing was such that I had a fragile edge. I know using a goofy style file is a frustrating endeavor.

 

[Trx250r180]

here is some second growth cedar out behind my house ,old growth around here is 6-8 feet across ,that is a 32 inch bar for reference .,seems like the 4-5 footers always have rot in them when fall them ,so lose 8 feet or so of first log
Had to rip the bottom one down the middle to move it with the skid loader ,got a lot of nice trim boards out of the rotten log still ,was all clear tight grain no knots

 

[Moparmyway]

Interesting, maybe my filing was such that I had a fragile edge. I know using a goofy style file is a frustrating endeavor.

Do you use 3/8 in .050 with anything ?
How many DL's ?

 

[Trx250r180]

Interesting, maybe my filing was such that I had a fragile edge. I know using a goofy style file is a frustrating endeavor.

goofy is not true square ,gives a curved side plate ,the .404 holds the edge longer than 3/8 ,must be the wider kerf ,here are some files i piked up for Mike at my saw local saw shop ,6 sided ,these work pretty good

 

[Moparmyway]

Get them double bevel square files while you can .............. last week, I FINALLY got the 12 Save Edge double bevel files that I ordered LAST YEAR !

 

[Moparmyway]

For my use square isn't worth the time, so semi chisel for me[emoji20]

Semi is great in them not-so clean situations .............. especially ant ridden center rot trees. They usually hold lots of black dirt and sand that loves to dull down sharpened full chisel. I have swapped to semi more times this year than I have in past years. Once I am through the ugly stuff, the square goes back on though.

 

[blsnelling]

In chainsaw racing what chains do they use?

Square chisel.

3/8 .050 on most, except in bike saws, which I believe run .404.

 

[Ron660]

H1R did terrible in that test too.
Airplanes are more like boat engines in the way they are operated. IE long periods of high load, high throttle.

Not the results I read. Best I remember H1R burned the cleanest compared to the others.
I've never used H1R. I've used Belray mc1+ many years ago in my CR dirt bike.
I've used mostly 800 off-road in my saws and willing to try something else.

 

[Moparmyway]

IMHO, try K2 .................. it is a frontrunner for sure !!
PM me your address and I will send you the rest of my H1R

 

[Moparmyway]

Hadnt noticed the smell much at all but all of it chokes me if I get cornered with it. Cant be good to smell any of it though

Its not just choking me ............ it actually makes me feel sick after a while
Doesnt happen with any other oil either, just R50

 

[mdavlee]

Somebody yesterday said they almost felt sick from all the fumes.

K2 and Mobil are the least offensive for milling.

 

[Ron660]

I found that square is pretty smooth in hardwoods, but also dulls much faster than round.
Probaly great stuff for cutting softwoods.
Speaking of softwoods. I snapped these pics of an old growth eastern white cedar and a old growth white pine. The cedar was close to 36"dbh and the white pine was quite a bit bigger.View attachment 447400 View attachment 447401

Just the opposite results from my experience. Square cuts faster and stays sharp a lot longer.

 

[mdavlee]

Get them double bevel square files while you can .............. last week, I FINALLY got the 12 Save Edge double bevel files that I ordered LAST YEAR !

I haven't had any problems getting them. Madsens always has some in stock. I haven't bought save edge in 3 years now.

 

[Ron660]

goofy is not true square ,gives a curved side plate ,the .404 holds the edge longer than 3/8 ,must be the wider kerf ,here are some files i piked up for Mike at my saw local saw shop ,6 sided ,these work pretty goodView attachment 447404 View attachment 447406 View attachment 447407 View attachment 447408

That's the same brand I use. Good ones.