Kupreanof
ArboristSite Lurker
blsnelling,
If you were to utilize the ci of the 660 engine and used a larger sprocket like say a 10 pin, could you get the chain speed that you're getting on that 372 without running higher engine rpms to achieve the same chain speed as with the 372? Would the 372 bog running a 10 pin sprocket? That would give you performance without the trade-offs that running higher engine rpms requires.
You can get chain speed (let's face it, it's chain speed that makes the cut fast or slow) with higher engine rpms or using the torque of a larger displacement engine to turn a larger diameter sprocket.
Equal chain speed causes equal wear to the b/c, so the only difference would be weight/ergonomics etc... of the powerhead. That would go to the light fast saw of course.
My point is that a 660 can run a much larger sprocket due to the greater displacement and thus if it utilized that advantage could put the 372 behind it handily. Whether or not that is practical or not is another debate (would the 660 have to utilize say a 14 pin (purely hypothetical) sprocket to leave the 372 behind, if so it's not going to happen as the cover, bar etc... would have to be modded to fit it even though the engine could turn it).
Does that make any sense or do I need to take the marbles out of my mouth?
If you were to utilize the ci of the 660 engine and used a larger sprocket like say a 10 pin, could you get the chain speed that you're getting on that 372 without running higher engine rpms to achieve the same chain speed as with the 372? Would the 372 bog running a 10 pin sprocket? That would give you performance without the trade-offs that running higher engine rpms requires.
You can get chain speed (let's face it, it's chain speed that makes the cut fast or slow) with higher engine rpms or using the torque of a larger displacement engine to turn a larger diameter sprocket.
Equal chain speed causes equal wear to the b/c, so the only difference would be weight/ergonomics etc... of the powerhead. That would go to the light fast saw of course.
My point is that a 660 can run a much larger sprocket due to the greater displacement and thus if it utilized that advantage could put the 372 behind it handily. Whether or not that is practical or not is another debate (would the 660 have to utilize say a 14 pin (purely hypothetical) sprocket to leave the 372 behind, if so it's not going to happen as the cover, bar etc... would have to be modded to fit it even though the engine could turn it).
Does that make any sense or do I need to take the marbles out of my mouth?
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