Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Efco Olympyk Oleo-Mac => Topic started by: Old Iron Logging on March 08, 2011, 09:05:37 pm
-
My NOS 962 is up to Timberwolfs place for a little touch up. He has a new 361 and new 036 to compare with. 1st results are in, both stock. 12" round wood, 962 vs 361= 962 wins by 2 tenths. More torque than 361 but less RPM. 962 weighs 0.5 lbs more. 962 has 1mm bigger bore.
-
Did TW get any video of his testing? 8)
Found a like new green 56cc about a hour one way.
-
Yes, said he would put it up.
-
962 vs 361 vs 036. All stock. 962 and 036 about even, 361 2 tenths off the pace.
http://www.youtube.com/watch?v=FT-zNWDEvy4
-
Price comparison up your way in NS new?
-
361 was anywhere for $625-$700 plus tax= $$748-$805 tax inc.
962 not available, 156=$661 tax inc, 165=$690 tax inc.
Never did like the 361 stock. 036 on the other hand was one of my favorites.
-
361 was anywhere for $625-$700 plus tax= $$748-$805 tax inc.
962 not available, 156=$661 tax inc, 165=$690 tax inc.
Never did like the 361 stock. 036 on the other hand was one of my favorites.
yes i agree. the 036 is probably my favorite saw.
-
The 962 has the highest power specs, so it fits that it is a tad stronger. ;)
-
Here is the 036 after port work.
http://www.youtube.com/watch?v=ZGziUcrw0Fo
-
Is the 962 and 361 going to get the same work over as the 036?
timberwolf = 036 shaved the base down 0.037 and domed piston 0.025 aiming to have the squish between 0.018 and 0.020 in. Port timing kept low with the goal of keeping lots of torque. Also took the venturi out about 1.5mm and cleaned up a few rough edges.
-
I don't think so. The 036 is supposed to have the milder porting. 361 and 962 are going to be a bit on the hot side if I understand correctly.
-
:o Sweeeeeet 8)
-
My 962 is going to ride in my porter to cut out my work saws if I get jammed. May cut the occasional tree. Do a few GTG type events. Told Brian to go as far as he did with the 675 Solo.
-
I sent Brian a Jon 625 piston as an option for the 962. Should let the intake be widened further than a stock piston.
-
962 is apart, compression was good stock 170 psi, but squish was a huge 0.045 in. Bringing squish down to 0.020 should pusch compression up in the 200 psi range.
962 piston looks good, skirt width is just a little over 70% of bore so will be able to get fairly wide with ports. The Jonny 625 piston, though it is a nice piston won't work well as it blocks the lower transfers off, would need windows cut and a some carving in the base, also the ring end is getting very close to poping out into the intake.
962 overall looks good, castings and ports are nice, 1mm bore advantage over the 361, compression will be easy to get even without a pop-up though there is 0.140 above the top ring to work with. Lots of room for ports, combustion chamber is nicely shaped. Intake boot could be better.
I'l have to get a new photobucket account to put some pics up.
-
It looks like the 962 has more potential than either the 361 or 036 in the power department.
-
Brian, to embed youtube video's here, click share below video and copy and paste link.
Welcome and enjoy......... 8)
-
962 is apart, compression was good stock 170 psi, but squish was a huge 0.045 in. Bringing squish down to 0.020 should pusch compression up in the 200 psi range.
So a 156/162 jug on a 165 case should work fine if the rod length is the same. 1mm longer stroke on 165 should tighten up the squish.
-
Work has had me busy last few days, but did some work on 962 tonight.
Port durrations stock
E 156.8
T 113.8
I 148.6
I don't thing I want to make any big changes on durrations maybe a few degrees more on transfers, a couple on the exhaust and widening out the exhaust should give enough blowdown area. Intake I think just widening and durration increased what ever lowering the jug 0.025 will add.
-
http://s1135.photobucket.com/albums/m633/4saw/ (http://s1135.photobucket.com/albums/m633/4saw/)
Here are a few 962 pics, lower transfer problem can bee seen with the Jonsred full circle piston.
-
TW just click the IMG code under pic you want posted and then paste the pics you wanted posted. That link is all your pics.
OK maybe you wanted them all at once, my bad.
(http://i1135.photobucket.com/albums/m633/4saw/962-with-Jonsred-piston-pro.jpg)
(http://i1135.photobucket.com/albums/m633/4saw/60-cc-shootout.jpg)
-
So Brian, are you going to add windows to the piston ?
Steve
-
What replaced the 962? I take it when you said NOS it is NLA.
-
Isn't that 361 ugly compared to two real saws.
-
The 962 was replaced with the 165. Less power. In field use the 165 feels weaker than the 156 also. 962 cyl kits are available to put on a 156. ;)
-
No, no windows, going to stick with the 962 piston rather than the Jonsred one. The 962 piston is wide enough to take the ports close to 70% and there is no problem with the ring end pin location like there would be with the single ring Jonsred piston.
-
So Brian, are you going to add windows to the piston ?
Steve
Or extend the duct into the case ?
Thanks,just saw the window comment you posted.
Steve
-
Was a little casting flaw on the one pin boss, looked pretty shallow and smoothed off the rough edges a bit. Should be ok, but if the piston was going to be pushed to the absolute limits who knows.
(http://i1135.photobucket.com/albums/m633/4saw/962-casting-flaw.jpg)
Finished the piston up, no pop up as there should be lots of compression just bringing the squish down to 0.020.
(http://i1135.photobucket.com/albums/m633/4saw/962-piston-ceramic.jpg)
-
TW, what did you think of the spare 165 cyl as compared to the 962?
-
Anything on the 962 build or comparison?
-
The 361 is done and a fraction of a second behind the 360 in cutting times. The 962 is on hold awaiting a new piston. It ate a stray washer. Brian can fill you in on the details.
-
Here is the 361
http://www.youtube.com/watch?v=G2fhX2pgtos
-
New piston is in for the 962. Should be in the mail on Friday. Looks like a 165 piston would work but ring pins are in a different place. Will put up a pic of the 2 tomorrow.
-
962 piston on left, 165 on right. Only difference is in ring pin placement.
-
Nice looking pistons (to the eye in a pic). Are both skirts same width?
On a side note, Brian could fix the pin issue if it had to be.
So the only difference in 962 and 165 is the cc of the large looking combustion chamber on the 165 and off set c.c. or is the porting stock different too?
-
The 165 has a 1mm longer stroke, and different upper transfers. The 962 is like a 200 series Husky. Upper transfers on the 165 are like the 300 series.
I think a 962 cyl on a 165 case should do good. If rod length is the same.
-
Brian, the new piston went out yesterday.
-
Any updates on how the 962 compared?
Art are the bore and strokes the same on 962 and 165? What is the difference, cylinder?
-
Brian said that the 962 should be back together this week. He dropped a washer into the crankcase on assembly and it ate the piston on startup. He has the new piston now.
962
61.5cc, 48mm bore, 34mm stroke
165
63.4cc, 48mm bore, 35mm stroke
-
Any updates TW?
-
Brian said the 962 will be back together tonight.
-
I think we are going to have to send him a video cam to youtube it for us. :'(
-
Brian said the 962 will be back together tonight.
Any word on how it done?
-
Not a word.
-
I've been told there is no such thing as a dumb question so here goes. Why does the ring pin location difference on 162/962, 165 matter? I don't understand.
Shep
-
I have no idea why two pistons are offered. There are 2 962 cylinders. The pistons with the center rear pin have cyls with a different intake.
It seems that the 165 cyl is a shared cyl with the Efco concrete saw. May explain the poor power characteristics.
-
962 should be heading home this week.
-
Got the 962 back today. Still have to mod the muffler and try it out.
-
Found the muffler mod. Sneaky. Not one sign that this saw has been ported. Extreme sleeper saw. :o
-
Did TW get to time the 962?
-
Don't think so.
-
Here is the 962 at the end of the video
http://www.youtube.com/watch?v=zcHtGmPIE_8
-
Here is the 962.
http://www.youtube.com/watch?v=C_IYT-TgN5c
-
962 needs more rpm to run with BIL's saws. Going to run 7 tooth next race.
-
A lot of times even if they are long ported for torque they cut better with a 7 instead of an 8 .You still have to keep those r's up in the sweet spot power band .
-
TW sent it out with an 8 on it. I tried it, didn't like it. 7 next time. Also didn't want to show the BIL all it had. ;) We race in Sept. Will post video.
Just for comparison the 962 is approx 2.5 seconds behind my old TW 260.
-
Well there you go .I've seen many a hot 3 cuber outcut a stock 066 over the blocks on cants .In the real world though they can't do it in round wood with the bark still attached . ;D Apples and oranges .
-
Here is the 962, kind of disappointed in this saw. Down on rpm and torque. Not what I was expecting. Both of my woods port 361's could beat the BIL's 365. 962 can barely run with his 346.
http://www.youtube.com/watch?v=KAksW7eBU3A
-
Here is the 365
http://www.youtube.com/watch?v=70Xa3sfgwJI
-
You can hear the difference in the 962 and 365 in the wood, the 962 falls off when hit wood. Your not running a 8T and really aggressive chain on the 962 are you?
Is the 361 runs on your utube too?
-
7 tooth rim and chain off of the 026.
Here is one of the 361's
http://www.youtube.com/watch?v=t4cKoZn1e7w
-
Slower 361.
http://www.youtube.com/watch?v=rkfA7ONwthA
-
Well the 962 may not be the fastest GTG saw, but it will eat 24" spruce all day, all week. Put 48 tanks on it so far this week with 1 more day to go.