026/260 finger ports questions

[Deets066]

WJ 69 fits on the studs nicely if you don’t mind destroying the carb box. Oem linkage can be used with a small tweak.

 

[Mastermind]

I would try an HD off a 361 next, because it’s one of the only HD’s with a smaller bore. Might be just right for a hot 026. Would have to plug the front impulse plate and add a standard HD pump plate.

The HD from an 029......

 

[Lightning Performance]

The HD from an 029......

Sounds logical

290 carb goes good on a ported 361. Choke needs mods but it works. That 361 carb could wake up my 260 a bit, maybe.

You need to a lot to run the 044/460 carb on a 361. They don't like it much and need help.

 

[Deets066]

If it was me, I’d cut the piston flat, cut squish, and get that jug as low as you can.

 

[Mastermind]

If it was me, I’d cut the piston flat, cut squish, and get that jug as low as you can.

Amen

 

[Lightning Performance]

If it was me, I’d cut the piston flat, cut squish, and get that jug as low as you can.

Is that done to get the exhaust down to 105-106?

Just curious. If I port them 026 saws they got gasket delete and sanded band. The exhaust comes out around 102 on an 026 or 026 Pro.
Never cut anything or did much with the 260 motors. Never came up, yet, but one 260 lives here for chunking down trees.

 

[Moparmyway]

Sweeps are elongations on the top of the transfers designed to direct the flow towards the area above the intake port. Cut domed and pop up are one in the same .
In my way of thinking which I'm sure not everybody agrees with is with combination of the dome and the sweeps it should improve the flow to purge the area above the intake port of residual exhaust fumes .All I can say is it must work .

Like this ??

 

[Al Smith]

That would be one way to do it .I used a higher popup and more sweep .About 22-23 thou piston head deck clearance .The idea in mind in my way of thinking is to sweep over the intake port and propagate the flame front on ignition .
Weather my theory is on the right track or not I can't say except it seems to work .I've done it on an 038 mag and 038 AV .The AV has a hemi domed piston and an offset chamber so the piston was not cut .

 

[Moparmyway]

That would be one way to do it .I used a higher popup and more sweep .About 22-23 thou piston head deck clearance .The idea in mind in my way of thinking is to sweep over the intake port and propagate the flame front on ignition .
Weather my theory is on the right track or not I can't say except it seems to work .I've done it on an 038 mag and 038 AV .The AV has a hemi domed piston and an offset chamber so the piston was not cut .

We need pics please

 

[Deets066]

Amen

I believe I’ve cut 2 or 3 dozen pistons for this model. Had a nice jig to cut em in the mill.

 

[Mastermind]

I believe I’ve cut 2 or 3 dozen pistons for this model. Had a nice jig to cut em in the mill.

View attachment 250726

You're a talented guy Keith.

 

[jacob j.]

You're a talented guy Keith.

You should see him juggle Cantaloupes while eating an apple.

 

[drf256]

You're a talented guy Keith.

You should see him juggle Cantaloupes while eating an apple.

Amazing guy

 

[Deets066]

You should see him juggle Cantaloupes while eating an apple.

The hard part anymore is getting the apple up to my mouth with my feet....

 

[Mastermind]

The hard part anymore is getting the apple up to my mouth with my feet....

Getting old ain't for sissies.

 

[Erik Markussen]

I am sorry for the late response. I am just seeing this for the first time.

If you are just cutting cookies you can try an 044 carb setup. Take a look at the thread above.

I am quite happy that you like the saw so much. Your carb elbow is a work of art. The 044 carb would require a bigger entry from the elbow and a boot swap.

PM me if you need anything for the saw, or want another.

They really don’t run well with any other carb than the 194, unless it’s race only.

Thanks for your reply. PM send