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Re: O/T - Fuel efficiency, 4cyl vs. 6cyl tractors
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Posted by kyhayman on July 13, 2006 at 13:10:58 from (205.188.117.14):
In Reply to: O/T - Fuel efficiency, 4cyl vs. 6cyl tractors posted by KYfarm on July 13, 2006 at 08:00:40:
Just looking at my own experience, it totally depends on what you are using it for. The fact that something has 90 horsepower is irrelevant, the depth and pitch of the torque curves is the influence on your effective power. In other terms, your 6 cylinder naturally aspirated engines with more cubic inches should have a flatter torque curve under load and more reserve kinetic energy. As opposed to that the turbo charged 4's boost up when you need the horsepower but its a shallow curve, not much reserve. When doing tillage work at max h.p, esp with a moldboard or chisel plow 6 cyl is the way to go. When I was raising tobacco I always kept an old 100 hp Case or IH for just that purpose. Cant beat 6 cylinders for keeping you going in heavy sod. First two years into 100% forage production, I still ran those big 6's. When I went to turbo 4's, annual fuel use dropped 30% (1200 gallons a year saved). With the disc mower, theres some difference, about 15 gallons a day. With the baler though, its huge. Only takes half as much fuel. Best I can figure, the baler is only pulling max hp at almost full, the governor and turbo add fuel and boost as you need it verses the big 6's where theres more baseline there all the time. Your results may vary.
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