powerking
ArboristSite Guru
ya see what this thread did to me......Now I'm gonna take my 028 apart again and do some more porting! I secretly love it!
Stihl 026 Stock / Ported Comparison Pics
- Thread starter Mastermind
- Start date
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Mastermind
Work Saw Specialist
Sundown
Stihl Going
When checking squish on a stock 260 pro, can you go through the spark plug hole or exhaust? Or do you have to remove the cylinder to get the correct reading?
Through the sparkplug hole, place the solder out to the outer cylinder wall parrell to the wrist pin.
Sundown
Stihl Going
The dome piston won' affect the reading doing it that way? Looks like a tapered smash for about a 1/2" then towards the very end about the last 1/8" it gets smaller, is that the squish band to be measured? Long time member but new to this.
Mastermind
Work Saw Specialist
The dome piston won' affect the reading doing it that way? Looks like a tapered smash for about a 1/2" then towards the very end about the last 1/8" it gets smaller, is that the squish band to be measured? Long time member but new to this.
The 026/260 has a lip right at the edge of the bore. That's the last 1/8" you're seeing. That is the measurement you want as well.
Sundown
Stihl Going
Well so much for just removing the base gasket then. Time to buy a lathe...
Sundown
Stihl Going
I know Terry, but the money I would save in shipping could add up and pay for a lathe, might take awhile. But then I could use the name Full Throttle Saws Inc... Lol. By the way I got something headed my way to turn around and head your way real soon. Maybe I should have it sent to you first on its way here, Unsure if it needs to be run awhile first though have read different opinions on that...
But then I could use the name Full Throttle Saws Inc... Lol. By the way I got something headed my way to turn around and head your way real soon. Maybe I should have it sent to you first on its way here, Unsure if it needs to be run awhile first though have read different opinions on that...
stihl038x2
ArboristSite Operative
Subbed in............ got one on the go right now :msp_thumbup:
Steve
Steve
Stihlman441
Addicted to ArboristSite
Hi there Randy
Would it be possible to turn a tapper from the outer edge of the piston inwards,so to have no step which would help with flow.
Would it be possible to turn a tapper from the outer edge of the piston inwards,so to have no step which would help with flow.
Mastermind
Work Saw Specialist
Hi there Randy
Would it be possible to turn a tapper from the outer edge of the piston inwards,so to have no step which would help with flow.
Yes it would. I doubt it would yield as much compression though.
I've evolved to cutting the squish band on these saws now. With the right shape on a cutter the step can be cut out nicely.
Stihlofadeal64
Addicted to ArboristSite
Bump - keep them post's and specs coming! :hmm3grin2orange:
stihl038x2
ArboristSite Operative
Are you just turning a "straight taper" on the squish band up to the combustion chamber ?? What angle , 2* ??
What carb work are you doing on the WT194 other than a polish & thinning ? Venturi boring ? re-jet ??
Steve
Mastermind
Work Saw Specialist
I've done a bunch of these saws Steve......and I've done them several different ways. I've just cut the protruding band out up the the dome (that's the one that needs the right cutter shape)......I've cut the whole dome out all the way to the combustion chamber on a 2° angle....I've also cut it out flat........I've done a few different popups as well.
On the carbs.........polish, thinning, and a little venturi boring. There's not much venturi to cut in the 194 though. I would love to find a carb that fits these saws without the butchering that it takes to put an 044 carb on them.
