Miller Mod and the PS-421 dolmar.

[Black Dog Chainsaw]

good read so far...

 

[CoreyB]

I have to get some runtime on them before I tweak farther. Why don't ya swing down and go run these 2 saws all day for me and we'll retest tonight. Lol.

Man I would love to! I will make that happen one of these days.

 

[Miller Mod Saws]

 

[Miller Mod Saws]

Ok boys as you can see I'm splitting hairs on this saw. Time to quit jacking around.
Dolmar at 105/123/76. 6 deg adv

Makita at 107/125/76. 8 deg adv.

 

[Miller Mod Saws]

Dolmar coming back apart. No little steps. Intake going to 80. If I kill it well that's why they invited epoxy.

 

[paragonbuilder]

Dolmar coming back apart. No little steps. Intake going to 80. If I kill it well that's why they invited epoxy.

I like it!


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[ajschainsaws]

I like it!


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Same here

 

[Keith Gandy]

Carl have u ported a 241c?

 

[Miller Mod Saws]

Carl have u ported a 241c?

I have not got that opportunity yet.

 

[Miller Mod Saws]

Here's what my 80 intake looks like.

 

[Locust Cutter]

Hell, that makita might be pulling through that Locust faster than my MS261 would. In fairness, the 261 is running 3/8" chain and might be a tad faster with .325" but I like the durability ad flexibility of 3/8" in Hedge...

 

[Miller Mod Saws]

Hell, that makita might be pulling through that Locust faster than my MS261 would. In fairness, the 261 is running 3/8" chain and might be a tad faster with .325" but I like the durability ad flexibility of 3/8" in Hedge...

I'd take that challenge. Lmao. If I can't pull it off well I'll upgrade to this saw.

 

[Miller Mod Saws]

Ok here's the results. And what I would like you to do is just listen to the vid. I drug the tac along tonight. The makita is holding 11000 in these cuts. The dolmar 11300. So it liked the lower intake as you can hear.

 

[David Young]

82 next?

 

[David Young]

What dia is the piston?

 

[Miller Mod Saws]

What dia is the piston?

82 next?

42 mm. I don't think so. I tore back apart the makita tonight. I'm going to raise the trans on it and drop the intake. 78 or 80 havnt decided yet. Aim for 107/123/78-80. The makita although holding less rpm seems to hold what rpm it has just a tad better. And the one thing I want to maintain is a great power band and easy usability. So if in the end I have one saw faster but one a little more user friendly. I will pick the more user friendly saw. I don't need to build the fastest saw on the block. Lol.

 

[David Young]

Grab the piston specs Carl let's look at swaps.
How about the carb zama?

What numbers does a 6400 have. They went 6port for a reason. Where they staggered before?

 

[CoreyB]

42 mm. I don't think so. I tore back apart the makita tonight. I'm going to raise the trans on it and drop the intake. 78 or 80 havnt decided yet. Aim for 107/123/78-80. The makita although holding less rpm seems to hold what rpm it has just a tad better. And the one thing I want to maintain is a great power band and easy usability. So if in the end I have one saw faster but one a little more user friendly. I will pick the more user friendly saw. I don't need to build the fastest saw on the block. Lol.

agreed 100%

 

[Miller Mod Saws]

Grab the piston specs Carl let's look at swaps.
How about the carb zama?

What numbers does a 6400 have. They went 6port for a reason. Where they staggered before?

I believe if you could find an overall length piston that's just a little longer and has a taller crown height you would open up some options. Not sure what come is on this saw as my 10mm tester isn't working right but I'm guessing 180ish. If ya could get that up to 200+ I do believe you could get it to maintain a higher rpm better. That's just thought though. No testing involved. Lol.

 

[Miller Mod Saws]

I didn't think the lower intake would help but I was wrong on that. I'm guessing it's due to the small carb. With more carb the higher intake maybe better.