Please see below courtesy of Įlectrical power is in general rated in watt (W) or horsepower (HP).
The true power of a motor is determined by engine type, (overhead valve/side valve) carburetor (naturally aspirated/fuel injected/turbo) rpm you use it at (2750/3100/3650) and many other factors. True, an overhead valve motor from a specific manufacture should have more power with more cc's but there are a lot of other factors that go into determining how much power is available for you to use. cc'c doesn't give you a good measurement of what the engine is capable of. For example, a 190cc Briggs & Stratton side valve motor will not have the same power as a Honda 190cc overhead valve motor. It is also not a good comparison from one manufacture to another. To me cc's is not a good comparison from one motor to another. Assume that your new snowblower motoe runs at less rpm.Ģ08 cc = 8 to 9 Gross Torque = 5.5 to 6 hpĢ77 cc = 11 to 11.5 Gross Torque = 7 to 8 hpģ05 cc = 13.5 to 14.5 Gross Torque = 9 to 10 hpģ42 cc = 15.5 to 16.5 Gross Torque = 11 to 12 hp I used 3600 rpm in the formula for this comparison. It's not exact, but it will give you a better idea of how big the new engines are.
Here is a simple chart of approximate cc to torque to horsepower conversions. If you are trying to get exact hp measurements you should research the torque ratings for the specific brand.įor 2009/2010 MTD has dropped all torque ratings on snow throwers. Other manufactures (like Powermore) may have different torque ratings for their motors. I also used the torque ratings from the Briggs & Stratton website for their motors to keep this chart simple. Here's the formula I used from the Briggs & Stratton website (rpm x torque / 5,252) The engine manufacturer's used 3600 rpm most of the time to rate the engine's horsepower so I will use that number in the formula. Instead I'm just going to show you a formula you can use to figure it out yourself.
I spent a great deal of time researching this and I'm not going to spend time trying to explain why the engine manufactures have changed their terminology. So we just start to get used to measuring an engine's output in torque and now for the 2009/2010 season a lot of the snow blower manufacturers are dropping the torque measurement and only giving us engine size in cc's. Of course no one understood what this meant and even though companies like Briggs & Stratton tried to explain it, it still didn't make much sense. Three years ago they changed the rules and started selling snowthrowers with the power measured in gross torque. It was a nice simple measurement that everyone was used to. Five years ago the power output of every snowblower sold here in the United States was measured in hp or horsepower.
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