60cc Shoot Out

[Wolverine]

6100 is, running that good against the other 2.

Don't forget, that Swede is only 56.5cc
EDIT: and fighting like a vicious wolverine.

 

[Terry Syd]

There's more left in the 6100 to find the formula for. I was trying to figure out how to put a rear boost port in the cylinder from the pictures and I noticed something we all missed -

The tongue pattern with the stamped writing in the center of it makes the pattern appear centered on the piston, but it isn't. Take a look at the locating pin on the ring, the pattern is off center. That's probably from the transfers on the clutch side opening just a bit before the flywheel side.

Randy has probably fixed that when he ported the saw, but for everyone else, they may want to do some remedial work. Without good porting tools, I just nip the piston edge until both sides open at the same time. I shine a light up through the transfers while looking through the sparkplug hole. Sometimes you need to rough up the inside of the tunnels to get them to reflect more light.

In the 'old days' with pressed in or cast in sleeves this wasn't a problem, but with full cast jugs there is a 'manufacturing tolerance' allowed in the casting. I've seen .5mm difference in transfer height in bike cylinders. I would expect that every jug from that mold would have the same defect. Perhaps the entire production run is using that mold.

 

[Terry Syd]

Going back to the issue of trying to put a rear boost port in, it would be a bugger of a job, especially without decent porting tools. However, the loop scavenging may be improved by using 'bridge ports' on that back transfer.

If the transfer flow could be made to start moving up as it heads towards the rear wall, I expect that the tongue pattern will decrease, perhaps even be eliminated. That should lessen the potential for short-circuiting and likely improve the cylinder filling.

 

[bryanr2]

 

[Terry Syd]

The tongue pattern is from the collision of the transfer flows. Instead of flowing up the back of the cylinder they are coming together and forming up over the piston. The clear area on the top of the piston is the bottom of the turbulence. The top part of the turbulence is subjected to the outward flow of the exhaust gases - part of the incoming transfer flow can be sucked out the exhaust port with the exhaust gases and thus the term 'short circuiting'.

A 'bridge port' is the cut into the cylinder liner where another port is positioned close to the piston to change the direction of the transfer port flow. Take a look at an 'open port' cylinder and you will see that the transfer flow is 'lifted' off the piston by the flow coming up along side the piston. The 'bridge port' does the same thing, it allows a flow up alongside the piston, it essentially changes the direction of the flow from the transfer port by 'lifting' the flow away from the piston.

The back transfer port on the 6100 is larger than the front port, which is not a conventional design, but luckily does provide a good size port that could be modified with a 'bridge port'. How wide and deep, I don't know. I will say that the port should have the general shape of an ordinary transfer, that is, that it should have more area down low and slowly converge at the top.

 

[Locust Cutter]

 

[sunfish]

so i heard from the owner of the 6100 that the saw was ported right out of the box. How many tanks had it seen prior to the videos? Think I read that the 562xp had the most run time on it of the 3. Any idea how much fuel the 357xp and 562xp had prior to getting ported? Im trying to measure just how sick a saw that 6100 is, running that good against the other 2.

The way I read it the 6100 & 357 were new & don't think the 562 had much run time.

 

[Duce]

The way I read it the 6100 & 357 were new & don't think the 562 had much run time.

If my memory serves me correctly. I had only cut 6 or 7 decent sized oaks (anything over 20 inch on trees I used a 372 or 390) with it. Always ran ethanol free fuel using Husqvarna XP oil 40:1.

 

[sunfish]

If my memory serves me correctly. I had only cut 6 or 7 decent sized oaks (anything over 20 inch on trees I used a 372 or 390) with it. Always ran ethanol free fuel using Husqvarna XP oil 40:1.

And yours was the 562?

 

[rocco490]

bryanr2 randy said ealier somewhere in the thread he has run the 6100 a fair amount about 1/2 a gallon threw it I think he said so its had some break in time
in any case I don't think there is a stronger saw in the 60cc class than the 6100s at least of saws built on a 60cc specific case/chassis

 

[Duce]

And yours was the 562?

Yes, mine is the 562.

 

[rocco490]

my 562 is my most used saw. awesome saw I have sold several saws all were masterminded but my masterminded562 is staying with me

 

[Duce]

my 562 is my most used saw. awesome saw I have sold several saws all were masterminded but my masterminded562 is staying with me

Liked my 562 before I sent it to Mr. Evans. Purchased a new Cannon 20 inch bar to put on it and do the saw justice. Again, Mr. Evans went above and beyond in his posting of the 3 saws. Have dealt with Mr. Evans and Carl Miller and both are straight shooters!

 

[Woodpecker]

As I understand it the 6100 has a relatively long break in period. I've run about a gallon through mine and it keeps getting stronger.

 

[bryanr2]

my 562 is my most used saw. awesome saw I have sold several saws all were masterminded but my masterminded562 is staying with me

one you get thru firewood season with that 6100, I want you to come back to this statement, and either confirm it or tell us how the 6100 changed your opinion of the 562.

 

[mdavlee]

If the 6100 had better spikes and a large mount I would have got it over a 562. That stuff is a deal breaker for me. A 28" lightweight in small mount doesn't exist.

 

[paragonbuilder]

If the 6100 had better spikes and a large mount I would have got it over a 562. That stuff is a deal breaker for me. A 28" lightweight in small mount doesn't exist.

Why do you run that big of bar on the 60cc saws Mike? Reach?


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[rburg]

Probably doesn't want to bend over.

 

[exSW]

Probably doesn't want to bend over.

Cue banjo music.

 

[mdavlee]

Why do you run that big of bar on the 60cc saws Mike? Reach?


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Pretty much. 562 pulls 24" of full comp through dead elm easily. No need for more powerhead weight for the same cutting speed.