Thanx KDHOTSAW for the 044 exhaust mod info!!!!

[rahtreelimbs]

I ran my 044 since I opened up the exhaust. The saw is entirely different. She runs great. The biggest difference I noticed was the increase in low end torque. There is a BIG difference now. Thanx Ken for all the help. Rich.

 

[Gypo Logger]

Hi Rich, Ken Dunn is a big boost to the 2 cycle chainsaw world. Ken gives freely of his hard found knowledge and is worth his weight in Casino chips when it comes to modified saws, whether it's racing or just plain logging.
Thanks Ken,
Ole John

 

[Dennis]

Kens a real creep...that guy taught me to build saws and they could only took first and second in each class they raced in today...maybe I should have built a third saw??

 

[Gypo Logger]

Hey Dennis, let us know how you made out. Is the snow pretty deep there still?
John

 

[kdhotsaw]

muffler mods

Hi Rich,
Glad the mods worked. Its amazing how plugged up they are making the mufflers now. very easy to get a 15-20 % increase in power. Now I know they get better emmission numbers But the saws run too hot. Also the 50-1 oil ratio drops the emmission levels at the expense of engine reliability and longevity. then they tell thier customers this is the best thing since sliced bread .
ken

 

[kdhotsaw]

racing saws

Hello dennis and john,
Dennis, you just got lucky, I know for a fact that most of those canadians put their chain on backwards just like john lambert does. thats why your saws took first and second
Ken

 

[Gypo Logger]

Hi Ken, how ya makin out? Got ere' Dunn yet?
I'm getting a little mift at your insinuations that us Canadians aren't the brightest bulb on the tree. It's only in B.C. that they put their chains on backwards.
I for one, have never done this before, but Dennis has it down to a fine art, because he cant file anyway. I was always wondering why he is humming that Aretha Franklin song, " Chain, chain, chain, chain of Fools".
John

 

[dbabcock]

Dennis,
I never had any doubt that your's and Ken's saw mods were capable of first place showings,. My only concern was how good the operator was. So who was running these saws when they blew away the competition?

 

[Dennis]

Johnboy...it is you that cant file my friend..do I have to bring up the 088 incident again?? and for the record...the only chains I run backwards are on my backwards running 930....we Canucks use them that way as it clears chips better and doesnt fill your boots with sawdust.

Doug, the neighboring Jonsered dealer (2 hours away) and I were running the saws..

 

[John in MA]

Hello Ken, any sage advice for a Jonsey 111? I don't want to get too extreme like porting or cutting a new head.

Thanks

 

[Dennis]

John..that muffler does really well with cutting it in half...takig out the baffles and putting in an extra port..then rewelding it back together...

 

[bwiesner]

Ok Ken:

What kind of oil do you use/recommend and at what ratio?
Later Butch

 

[kdhotsaw]

Oil Ratio/type of oil

Hi Butch,
What oil I use is maxima 927 synthetic. I run it at 32-1 in all but the race saws. If i run alcohol i use 20-1. I hope thius info doesnt start the great oil debate again
If any of you guys want some good technical data on oils go to maxima,s web site and select their techinical pages
www.maximausa.com
ken

 

[bwalker]

KD, Have you tried Maxima K2? Its a polyol ester based synthetic that is suppose to have the same film strength as 927. I used to run 927 in mx bikes in the past, but I switched because the 927 really gummed up the expansion chamber. Castor oils are pretty nasty from a deposit standpoint, although 927 seems to leave engine internals fairly clean.

 

[eyolf]

KDHotsaw...thank you for sharing the Maxima link; I understand where you are coming from with the richer oil ratio's from that.

So, let me see; if Maxima is close to right, interpolating from their data suggests that 40/50:1 is probably OK for light duty, weekend-use saws that idle as much as they power up, is marginal for heavier use, and is downright foolhardy for banzai cutting?

Anybody got any access to industry studies that suggest how different types of users work their saws?
I'm thinking that 5-10 seconds of idling between bucking cuts is about all that saves some saws, the arborist that is forced to think his way through each cut up in the tree is saving on the equipment, while the ground guy with the big saw is only interested in $$$ signs and uses up saws more quickly.
The firewood warrior is probably better off with a 4 cu in saw that easily loafs it's way through than the 2.something firebreather that is giving him 99.9% of all it has every cut.
and of course, the suburbanite doesn't matter, because he'll never get enough hrs on his little green poulan to ever matter anyway.

I plan on going home and dumping all my 50:1 into the riding lawnmower tonight. It's getting old, anyway...I mixer it up last Friday!

 

[kdhotsaw]

jonsered 111

hello john,
Some of the mods you can do to your jonsered 111 that will help is opening up the muffler. then on the ignition timing you can pull the flywheel and cut .030 off the crankshaft key to advance the ignition timing 8 degrees and work on the choke side of your carb. if you remove the choke shaft and butterfly it will help a lot as the elbow between the a/cleaner and carb is restrictive and the air curves in the elbow and hits the choke plate even tho it is open. if you have the barrel off have the base milled so you end up with a squish clearance 0f .026-.030. it comes with a squish clearance of approx. .050 from the factory. the ports on the 111 are narrow and the duration low,so ultimately you are going to want to change the porting numbers for more power
judging from the change in the tone of your posts dennis and myself have got you hooked and its just a matter of time before you'll want the 111 brought up to current race standards. the 111 jonsered has been campained quite successfully in the over 6 cube class. bennie whitfield from tennessee runs a hot 111 against the 250 motorcycles and does quite well. if they throw a chain or burp in any way he usually places, not bad fao a saw motor that is less than 1/2 the size.
ken
[email protected]
530-589-2744

 

[bwalker]

So, let me see; if Maxima is close to right, interpolating from their data suggests that 40/50:1 is probably OK for light duty, weekend-use saws that idle as much as they power up, is marginal for heavier use, and is downright foolhardy for banzai cutting

I dont know if that study is valid for a saw application.The 125 cc mx bike engine the study was done on has differant piston and ring designs than a saw. 125cc Mx bikes are deisnged for max power with enough relability to last a few races. If you look at the rings on a mx bike you will find they are thinner than a saws in relation to bore size.. IMO the oems would not reccomend a 50:1 ratio if it had a negative effect on durabilty. Parts can be designed to run on less oil. BTW im not jumping on the amsoil zelots mantra/bandwagon of less oil is better. I run my saw at 32:1 and my 500 cc mx bike at the same ratio. If I had a tuned to the max hot saw and was useing race fuel i would use ratio in the neighborhood of 20:1, but that does not meen that 50:1 with oem mix will lunch your saw.

 

[Gypo Logger]

Hi Ben, what is the major difference between Maxima 927 and Maxima K2? Is it castor bean ratio to synthetic, or is it a total different mix?
John

 

[bwalker]

Hello Gypo. Yes, K2 and 927 are totaly differant. Castor 927 is a castor/ester blend that has been around for along time. K2 Is a straight ester that was just introduved last year. K2 will burn cleaner and have the same anti wear charachteristis as 927. You will not get the heavy carbon crust that you have on your 066 if you runa straight synthetic oil. BTW if you want to save a little monet try Mobil Mx2T. You can buy it at Autozone or online from www.avlube.com for a very reasonable price.

 

[z4lunch]

K2

BWalker
Steve here... Ive been running the K2 in my saws, I like it.. piston always has a good coating of oil on it, looking through the exhaust port. I run 32/1. I use my Stihl oil in my old John Deere...helps lube the valve guides.
Steve
ps I have the web site I bought it from on my computer at home if you need that info. I could'nt find it locally.