Here's a video of 7 cuts...of my new 5100S Dolmar (Thank you, outdoortype) and the 16 month old one that is woods modded by Ed Heard. I have the pipe on it right now. Timing is a very close estimate from the video data.
In order, on the video, piped saw 4.0, stock saw 5.85, then two more, but close to a knot, piped 5.7, stock-8.15.
stock saw with ported muffler 7.9, piped 5.6 bogged a bit, and 5.5 higher revs.
Of note, my woods ported 3120 with a 36 inch bar cut that same ~15 inch spruce in about 3 seconds. (with worn .404 that Andy ground for me, and I touched up by hand till it was pretty darned sharp). The brand new 660 with a poorly filed chain was at about 5 seconds...36 inch bar. And in 26 inch spruce, the 3120 cut about 19 seconds, the 660, 31-32....
The piped saw is 16 months old, and was woods modded by Ed Heard. It is running 16 inch bar/3/8th chisel, half round ground and half square--I forgot to square file the first half--new chain just a bit dulled.
Stock saw is 16 inch bar, and .325 chisel, round filed.
This is not as precise as many folks do timing and testing..with a good solid log, and the same wood..no knots.
But what I deduced was that the stock 5100 is one fast saw, as I've always heard. What is interesting is that it didn't seem to cut much faster when I put the ported muffler on it. But I did neglect to richen the mixture...perhaps it was too lean.
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In order, on the video, piped saw 4.0, stock saw 5.85, then two more, but close to a knot, piped 5.7, stock-8.15.
stock saw with ported muffler 7.9, piped 5.6 bogged a bit, and 5.5 higher revs.
Of note, my woods ported 3120 with a 36 inch bar cut that same ~15 inch spruce in about 3 seconds. (with worn .404 that Andy ground for me, and I touched up by hand till it was pretty darned sharp). The brand new 660 with a poorly filed chain was at about 5 seconds...36 inch bar. And in 26 inch spruce, the 3120 cut about 19 seconds, the 660, 31-32....
The piped saw is 16 months old, and was woods modded by Ed Heard. It is running 16 inch bar/3/8th chisel, half round ground and half square--I forgot to square file the first half--new chain just a bit dulled.
Stock saw is 16 inch bar, and .325 chisel, round filed.
This is not as precise as many folks do timing and testing..with a good solid log, and the same wood..no knots.
But what I deduced was that the stock 5100 is one fast saw, as I've always heard. What is interesting is that it didn't seem to cut much faster when I put the ported muffler on it. But I did neglect to richen the mixture...perhaps it was too lean.
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