I bet its because every time it comes out you get distracted.
Show them numbers!!!
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tree monkey
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pm scented
redline4
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If it's anything like being in one of the multitude of strip joints in Hurley Wi, all the eye bleach in the world won't help.
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Yet you still go....
MG porting
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MG porting
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In some cases apsalootly!!
redline4
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Hey, once you've seen a 50 something 300lb chick in a thong with 3 toofs gettin down to Warrant's Cherry Pie, what else in life can top that on the scale of wtf?
MG porting
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redline4
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Yeah, as long as there isnt the excessive wiggling, giggling and sweating within sight.
redline4
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Nope. That was before I even had a cell phone.
tree monkey
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well, um, pm scented
Redfin
Meh...
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Bingo
It all comes down to physics. Compression adds energy in the form of heat to the combustion chamber. We have all felt a compressor tank get warm after it fills and then get cool upon emptying. Also how refrigeration works.
But energy is never created, it only can change forms. So it takes energy to make the heat from compression.
One wants the charge that’s in the combustion chamber to have the fullest fastest burn possible. Preheating it (compression) helps that. Too much and you will get detonation (so perfect that it will fire before you want it to).
So you have to figure out if the parasitic losses of compression are overcome by the power increases.
The higher the compression, the more heat the cylinder will generate. The high compression saws definitely get hotter and don’t hold tune as well as lower compression. The OEM know that, but they also have those tiny muffler outlets that maintain heat as well. Higher compression also slows down max rpm and spoolup.
Small bores like more because they tend to have much more cooling area vs bore size. If you put an 036 and 044 jug on a bench they are indistinguishable at quick glance.
This is also why it’s easier for a cold saw to fire without the decomp pressed in.
The point is that, like all else, it has to be matched to what one wants in a saw. There is no perfect combo. I tailor it to what the end user has in mind for the saw.
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I tend to prefer:
50cc - 240
60cc - 220
70cc - 200-210
80cc - 190-200
80+ - 180
For milling, where heat is your biggest enemy, I would tighten squish and clean up band as little as possible. I’d be fine at 150-160.
50cc - 240
60cc - 220
70cc - 200-210
80cc - 190-200
80+ - 180
For milling, where heat is your biggest enemy, I would tighten squish and clean up band as little as possible. I’d be fine at 150-160.
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I guess you don’t recall, it was the first little spat you and I had on AS David.
I sanded it down and got 220. I thought the saw ran great, but now that I have seen the light, I’d never do it again.
It was Pre-lathe days and my work sucked.
