Trx250r180
Saw polisher
ok another qwestion ,why does my 044 with 200 psi pull over a lot easier than my 660 with 200 psi ? does piston bore make that much of a difference on cylinder pressure ?
200psi= 200 pounds per square inch. The more square inches there are the more pounds required to push the piston through the compression cycle. A 660 has more square inches than an 044.ok another qwestion ,why does my 044 with 200 psi pull over a lot easier than my 660 with 200 psi ? does piston bore make that much of a difference on cylinder pressure ?
Right. Why not send Amsoil the bill to repair the 066, claiming that the owner's saw was blown because of Amsoil's misleading marketing claims? Might get someone's attention and perhaps the 100:1 garbage will be taken out of their sales literature.This turned out to be a hell of a good thread...
You still Recommend adding 3 OZ of "Torco accelerator" to your 87 octane/32:1 H1R per Mix Gallon?87 octane is all I ever use.
Right. Why not send Amsoil the bill to repair the 066, claiming that the owner's saw was blown because of Amsoil's misleading marketing claims? Might get someone's attention and perhaps the 100:1 garbage will be taken out of their sales literature.
You still Recommend adding 3 OZ of "Torco accelerator" to your 87 octane/32:1 H1R per Mix Gallon?
I've been following this suggestion to the letter since getting the saws back from you Randy.
Yesterday Let my little girl try out the 346xp to pick out and cut the Christmas tree. Heck, come to think of it
I don't think I've seen anyone run that little saw and not crack a smile View attachment 321592
You still Recommend adding 3 OZ of "Torco accelerator" to your 87 octane/32:1 H1R per Mix Gallon?
I've been following this suggestion to the letter since getting the saws back from you Randy.
Yesterday Let my little girl try out the 346xp to pick out and cut the Christmas tree. Heck, come to think of it
I don't think I've seen anyone run that little saw and not crack a smile View attachment 321592
I know. What gets me is that Amsoil will still continue marketing 100:1 and those who aren't members of AS will likely see their saws damaged, stock or modded, if they buy into these claims.I'm not worried about the repair bill...
200psi= 200 pounds per square inch. The more square inches there are the more pounds required to push the piston through the compression cycle. A 660 has more square inches than an 044.
And Brad is right that if the pull cord wraps around a pulley of larger diameter, you will have a greater mechanical advantage.
Some need to find out the hard way. Most who try the 80-100:1's claim just don't blindly try it. They read claims on the net and hear some stories of pros using it in wackers and such. They also are told by dealers and sharp mechanics not to run less oil than 50:1, but do so anyway. Yes some stock low power light load ope will survive on it, but to expect a saw, especially a ported one to live very long is a pipe dream.I know. What gets me is that Amsoil will still continue marketing 100:1 and those who aren't members of AS will likely see their saws damaged, stock or modded, if they buy into these claims.
Probably not worth your time, the envelope, or the stamp. The fact that there is good information about this issue on AS is significant. Can't fix everything in the world...You don't really think they would listen to me do you?
You guys have all got that one right. A piston with more surface area (larger diameter) will require more force to push through that 200PSI. Just like a hydraulic ram with a larger piston exerts more force at a given hydro pressure.
Also a pulley with a larger effective diameter (how far from center the rope is where it meets the pulley) will have more leverage to turn the crank against that pressure. A good example is a little 41cc Homelite Super E-Z. I've seen them blow over 180PSI with a fresh set of rings. The effective diameter of the starter pulley on those is about 1.5-2". They are NOT easy to pull over without the comp release open. They also 'feel' like they have great compression even when heavily scored and blowing about 110PSI.
A 288XP has a relatively small starter pulley for the displacement. My McCulloch Super 250 (87cc) blows about 165PSI, yet is MUCH easier to pull over than a 288XP (also 87cc) blowing similar #'s. The old Mac's starter pulley is probably close to an inch larger in diameter than what's on the 288XP.
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