Search results for query: *

It's hard to go stock once you have run ported saws. It kind of nags at you, I find.

I guess the guy that offered to do the job knows the saw and appropriateness of a pop up piston for it, but there are variables. What is the squish when stock (area above piston and top of combustion chamber) would he need to mill the base of the cylinder to lower it to make a pop up...

Just "runs fine" is a different saw from a good woods mod, which is running fine with more power and speed. Like Squish said, you can't go wrong with that model and better tuning. I think it's pretty established that a good job for a working saw doesn't shorten the life at all, maybe prolongs...

Easy enough to have gotten on the other side of the log to cut, a little cramped, but...since the mini was working in the area. It's the little things too.

Yep. There are so many things to keep in mind when doing this work. Working quickly and safely has it's attention demands.

Yesterday the back of the mini hit me in the back as the guy operating it was swinging it around. I was bucking at the time and went flying. I'd say the blame was fifty-fifty. No damage but a bit of a start.

Couldn't help noticing that Lou appears to have an open port situation going on as well. Right Al, intake opened up too much on the bottom. I think I've widened an exhaust too much too, so a piston window slightly showed up. Not so serious it would seem. First time running it yesterday, I...

Actually, I was able to go back, sort of. I left myself an open port situation by opening it up too much, so I welded a small piece of aluminum on to the piston skirt, and shaped it to the edge. To my skepticism, it worked out.

There is that one philosophy about doing things. "If you have never tried, don't start now". I think that some surfer came up with the concept, not wanting his local break becoming even more crowded.

Just wondering if there was a new ring on the piston, not yet seated and getting some results from the combustion blowing by? No doubt that a pop up with tighter squish will produce more heat on the crown.

Kevin, what oil mix ratio do you like for modified saws? I use 35:1 With the higher compression and greater revs, depending on the mod, it seems that a bit more oil would be good.

Sorry Kev, of course! As long as you are staying within the guidelines of clearance, a pop up should hold up. There is a greater tendency to blow a ring out of it's groove, but once again there are guidelines. How a saw is used would be a factor as well. Cooking it with a dull chain does...

Steve, why would you need to be switching pistons? Pop ups shouldn't be burning up, as a rule. So far I have never had to replace a modified piston, even with a tight squish and hard use. It's certainly possible that damage will occur, but then you might be looking at replacing more than...

Those really are reasonable prices for the work involved. I mean you could crank one out in a number of hours within a day, but I think a full day or more is pretty realistic for a woods mod, especially when involving some machine work on the cylinder base and piston crown.

Agreed, a new and valuable saw might not be the wisest choice for your first mod, but the general rule that most advise, is to get yourself some old cylinders and a piston or two to practice on. That way you will learn what cutters will work best in those tight quarters, etc., and gain control...

What about canadiantreeman? A basic working woods mod is not so difficult. Guaranteed results! Toss the base gasket to reduce squish and raise compression, open up the ports, and maybe lighten up the piston. Growl...:X

I'm going to turn my modded saws into the Red Cross now. I'll still have two. Big wood and bucking are where mods keep me interested. Really, there is a very practical side, when you want to do the back cut asap, like when driving trees through other trees, and the barber chair scenario. A...

I liked the beer idea better.

Sure, if the piston and cylinder are in good shape. Probably a new set of rings would be good too, depending on the mileage.

It makes chainsawing enjoyable. How much is that worth if you do it all the time?