Mastermind Ported Dolmar 6100

[CoreyB]

Thanks David.......any ideas are welcome.

I didn't get to tear back into this saw yet. Had to do some work on the van this morning. I'm grinding on a pair of Huskys right now.......

I have heard of a guy trimming some of the plastic tabs under the air filter. But I never understood fully which tabs. He did say that performance improved. But I don't know how much it actually could.

 

[CoreyB]

He also said that he taped up all the holes in the filter box area to force more of the fly wheel air into the carburetor.
Not my images.

 

[tomscott]

I've got one issue to work out with this saw. I can't tune it so that it becomes overly rich. No matter how far out the high speed jet, it's not too fat. I can make it too lean, but not too rich.

Thoughts?

Just thinking out loud here... Keeping in mind that the reeds are a demand-based system, and that they only allow more air without additional fuel, your porting improvements might now be passing substantially more air through the reeds. Assuming there is no carb blockage and that the carb is all functioning properly, I suspect that must be the answer. You may need to be willing to sacrifice a carb to experimentation, as even tiny changes to the carb can cause a big difference in the fuel flow.

The other option my be to use a stiffer reed to force more of the air to flow through the carb, but that would probably reduce some of the gains as you are now adding air flow resistance back in to the equation.

The next step in the madness is to find a small carb to mount over the reed inlet; dual carb setup, so cool...

 

[Locust Cutter]

Great, it's already a little hot rod and now it'll have the equivalent to 4bbl... LMAO This could get about sick and do away with some 70cc saws making the jump to the 80-100cc range more logical... This is pretty cool!

 

[smokey7]

Very impressive build. That is for sure what i love to see in a work saw. That thing holds revs and torque so well. It did so well in the transition in bucking and bogg spots!!!!!! Truely one 6100 id want to mapp out everything as i bet something is special a out that saw. Very very nice job

 

[Mastermind]

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He also said that he taped up all the holes in the filter box area to force more of the fly wheel air into the carburetor.
Not my images.

Lots of work done under the air filter in this saw Corey.

Sorry I didn't get back to this saw yet. My wife dragged me outta the shop to haul me to town. I tried to resist.......but she mentioned ice cream.

 

[David Young]

What kind? Anything peanut butter and chocolate or maple and I'm in trouble

 

[exSW]

You know,there's a DQ ice cream cake in my freezer. Oreo.

 

[Mastermind]

What kind? Anything peanut butter and chocolate or maple and I'm in trouble

She wanted me to have a Reese Cup blizzard. I finally gave in........

 

[exSW]

She wanted me to have a Reese Cup blizzard. I finally gave in........

Reese cup. That was my birthday cake.

 

[Mastermind]

Reese cup. That was my birthday cake.

My arm hurts where she twisted it.

 

[Terry Syd]

and do away with some 70cc saws making the jump to the 80-100cc range more logical...

Unless you're a sick puppy like me and put a narrow kerf bar on it. With the 15% increase in cutting speed you have 70cc X 1.15 = 80.5cc

and the saw will be lighter and quicker handling...

 

[weedkilla]

Unless you're a sick puppy like me and put a narrow kerf bar on it. With the 15% increase in cutting speed you have 70cc X 1.15 = 80.5cc

and the saw will be lighter and quicker handling...

Wanna line up against my 281 running 404 chipper? You might just double the cut speed.

 

[Terry Syd]

The cutting speed is nice, but as a 69 year old firewood hack with health problems, I like the light weight and ease in handling even more.

 

[David Young]

My arm hurts where she twisted it.

Really sorry to hear your suffering. Rest that arm up Randy.


Next time tell her to twist your legs instead maybe they'll Swell up and look normal

 

[WKEND LUMBERJAK]

Really sorry to hear your suffering. Rest that arm up Randy.


Next time tell her to twist your legs instead maybe they'll Swell up and look normal

You guys are a mean lot.

 

[weedkilla]

The cutting speed is nice, but as a 69 year old firewood hack with health problems, I like the light weight and ease in handling even more.

I totally understand - just as I'm sure you understand why i keep an 80cc saw set up the way it is for typical firewood duties, it's certainly not my only saw. Most of my firewood is dead standing stuff that died in the last serious drought years, mix of blue gum and stringy bark.

 

[VinceGU05]

Let's see the inside of the carb. The wet side may have an auxiliary jet you can drill. Failing that, we just might drill an auxiliary jet in the back of the discharge nozzle, just like the Zama carbs.

yup.. drill it out bigger randy.. works for me!

 

[Terry Syd]

I'm sure you understand why i keep an 80cc saw set up the way it is for typical firewood duties

I've got a modded 77cc saw that I should use more often for my bucking work, but it seems to keep getting heavier every year. I've also noticed that the wood I cut is also getting smaller. - I think life is trying to tell me something.

 

[Mastermind]

Really sorry to hear your suffering. Rest that arm up Randy.


Next time tell her to twist your legs instead maybe they'll Swell up and look normal

Wow. Just Wow.

Best Answer?

lol