Wild Knight
ArboristSite Guru
I posted the before and after video of my ported 441 in a previous thread. After running it, we wondered how it compared to the 440 with a big bore kit (Erick ported this saw too of course.) This necessitated us spending some free time yesterday putting the saws through their paces. We cut everything from black locust to pine to basswood just playing around. We found where the saws were holding their RPM best in the cut and used this setting for our test. Interestingly, both the strato and non-strato design were holding best between 14,400 and 14,900 RPM, but then again both saws were ported by the same guy for the same purpose.
<a href="http://picasaweb.google.com/lh/photo/bwAGkYzRkI8EgqqI8U1Fnw?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh6.ggpht.com/_iBy5cGjruPI/S1xj4sHf4kI/AAAAAAAAAPg/DHl6ndobRyE/s800/DSCN2550.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/ZDcXYdUC7_0kA9PPx0qjRQ?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh3.ggpht.com/_iBy5cGjruPI/S1xjyra0RmI/AAAAAAAAAPE/91IJKAVouOI/s800/DSCN2545.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/pl2u0O93ARL4uwreq_Wqpw?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh6.ggpht.com/_iBy5cGjruPI/S1xj5zBufbI/AAAAAAAAAPo/vBb5JisKboM/s800/DSCN2555.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/Zqk_WedJ7obpXyPva8shBg?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh4.ggpht.com/_iBy5cGjruPI/S1xj7YR-2WI/AAAAAAAAAP0/it8i1eaZ2l0/s800/DSCN2558.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/e7BoG7WD3C-3goxBmH69PQ?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh4.ggpht.com/_iBy5cGjruPI/S1xj0PvnEII/AAAAAAAAAPM/aQ2U47XEnbo/s800/DSCN2546.jpg" /></a>
Both saws were ported with the intent that they would remain work saws and not all-out racers. Basically, they were built for torque so that the saws would maintain higher RPM in the cut (though they will both spin at very high RPM without load). Accordingly, we tested them with what we would use in the field: 7 pin rim and RSC chain. We also tested them with an 8 pin rim and 9 pin rim to see how well the saws held their power, i.e., how much torque are they really producing. Even if two saws perform the same with a 7 pin rim, you'll see differences and, ultimately, which saw is making more power as you increase the torque demands. We cut three passes with a 7, 8 and 9 pin on each saw, running the same bar and chain on both saws for all cuts. Lastly, we run a bone-stock 440 with RSC chain on an 8 pin for a secondary comparison.
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Listen to the throttle response of the ported 441; it is extremely fast. While this may be due to the 4-port transfers, it is noticeably faster than the 440.
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Compared to the stock saw, both the 440 BB and 441 are 45% faster than a stock saw. Holy smokes!
Under work conditions, the two ported saws are performing exactly the same. While I have statistical programs at my disposal, the eyeball test here seems sufficient to analyze this. The only difference between the two saws is observed with the 9 pin. The 441 begins to separate itself from the 440 BB, as the strato saw is still holding its cut times while the non-strato is slowing down (441 is 17% faster).
I have to admit, I have to eat a little crow myself. In the 441 vs 460 debates, I have recommended a time or two that if you plan to port and mod, then get the 460. If you plan to run stock, get the 441. Well, I'd say the 441 mods as well if not better than the 440 and 460.
<a href="http://picasaweb.google.com/lh/photo/bwAGkYzRkI8EgqqI8U1Fnw?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh6.ggpht.com/_iBy5cGjruPI/S1xj4sHf4kI/AAAAAAAAAPg/DHl6ndobRyE/s800/DSCN2550.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/ZDcXYdUC7_0kA9PPx0qjRQ?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh3.ggpht.com/_iBy5cGjruPI/S1xjyra0RmI/AAAAAAAAAPE/91IJKAVouOI/s800/DSCN2545.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/pl2u0O93ARL4uwreq_Wqpw?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh6.ggpht.com/_iBy5cGjruPI/S1xj5zBufbI/AAAAAAAAAPo/vBb5JisKboM/s800/DSCN2555.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/Zqk_WedJ7obpXyPva8shBg?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh4.ggpht.com/_iBy5cGjruPI/S1xj7YR-2WI/AAAAAAAAAP0/it8i1eaZ2l0/s800/DSCN2558.jpg" /></a>
<a href="http://picasaweb.google.com/lh/photo/e7BoG7WD3C-3goxBmH69PQ?authkey=Gv1sRgCN-atab5gI7xRA&feat=embedwebsite"><img src="http://lh4.ggpht.com/_iBy5cGjruPI/S1xj0PvnEII/AAAAAAAAAPM/aQ2U47XEnbo/s800/DSCN2546.jpg" /></a>
Both saws were ported with the intent that they would remain work saws and not all-out racers. Basically, they were built for torque so that the saws would maintain higher RPM in the cut (though they will both spin at very high RPM without load). Accordingly, we tested them with what we would use in the field: 7 pin rim and RSC chain. We also tested them with an 8 pin rim and 9 pin rim to see how well the saws held their power, i.e., how much torque are they really producing. Even if two saws perform the same with a 7 pin rim, you'll see differences and, ultimately, which saw is making more power as you increase the torque demands. We cut three passes with a 7, 8 and 9 pin on each saw, running the same bar and chain on both saws for all cuts. Lastly, we run a bone-stock 440 with RSC chain on an 8 pin for a secondary comparison.
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Listen to the throttle response of the ported 441; it is extremely fast. While this may be due to the 4-port transfers, it is noticeably faster than the 440.
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/hIDL3KwFTLU&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/hIDL3KwFTLU&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
Compared to the stock saw, both the 440 BB and 441 are 45% faster than a stock saw. Holy smokes!
Under work conditions, the two ported saws are performing exactly the same. While I have statistical programs at my disposal, the eyeball test here seems sufficient to analyze this. The only difference between the two saws is observed with the 9 pin. The 441 begins to separate itself from the 440 BB, as the strato saw is still holding its cut times while the non-strato is slowing down (441 is 17% faster).
I have to admit, I have to eat a little crow myself. In the 441 vs 460 debates, I have recommended a time or two that if you plan to port and mod, then get the 460. If you plan to run stock, get the 441. Well, I'd say the 441 mods as well if not better than the 440 and 460.