I scanned the responses and there was some things I either missed or people did not mention. A C-281 engine has a better cam, better flowing head, and a higher compression head. So yes you can take a C-264 to 281 cid but it will have a few less horse power than the same pistons in a C-281. I have a C-281 with comformatic pistons in an M that has 67 hp at 540 PTO with stock high idle of 1600. The advantage a Super M has over a 450 is there is no live hydraulic pump to spin. So when you place a C-281 in a Super M it will make more horsepower on the Dyno than if the same engine in a 450. A C-281 will simply make more horspower with the same pistons as a C-264. I should add that my 67 HP engine is wihtout muffler, oversized venturi in the carb, port matched gaskets, polished intake runners, multi angle valve job. And a couple other little things I have learned along the way. The engine, head, cam, manifold are all stock except for those pistons with the tiny little dome. Oner more thing. My comparisons are assuming the C-264 has the 8060 head on it.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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