The formula that works best only applies to the small newer normally aspirated (carbureted) 4 cycle engines. The ratios change slightly worse with altitude and slightly better with fuel injection. Most American mowers and the newer 4 cycle outboard motors fit into one of these two formulas: Typical new carbureted engine well tuned: 1 x HP per each 25 cc Fuel injected: 1 x HP per each 22 cc Notes: -Most enginesare tuned down to a lower HP for better engine life. -It is common for the same cc engine to be built in 3different HP versions with the highest rated being the maximized HP per cc version. That is how you see price and HP changes on the same cc engine made by the same company. -Some of the newest (2008 and newer) engines from Japan perform slightly better (10-20%). A typical 150cc motor should equate to between 3.5 - 6 HP+ depending on tuning with 5 HP being the adv.
A Typical 1200cc Motor should produce between 50 - 75 HP depending on tuning. Max/High Performance engines for motorcycles and racing do not fit these formuls and can vary up to double and more. These are standard use numbers. The actual formula plots as a curve and is not a fixed linear formula.
HP does not directly relate to cc
A convert cc has 350 horsepower
You need to know the cubic inch not hp to convert to cc.
To convert cubic centimeters (cc) to horsepower (hp), a common rule of thumb is that 1 hp is approximately equal to 15 cc for small engines. Therefore, for a 203 cc engine, you can estimate it to be around 13.5 hp. However, actual horsepower can vary based on engine design and efficiency.
To convert cubic centimeters (cc) to horsepower (hp), you can use a rough estimate where 1 hp is approximately equivalent to 15 cc in a typical gasoline engine. Therefore, 244 cc would be roughly equal to about 16.3 hp (244 cc ÷ 15 cc/hp). However, this is a general approximation and actual horsepower can vary based on engine design and efficiency.
¾ hp
its not an exact science because cc's don't convert directly to hp but its probally rated around a 7
To convert cubic centimeters (cc) to horsepower (hp), a rough estimate is that 1 hp is approximately equal to 15 cc for gasoline engines. Therefore, a 133cc engine would be roughly equivalent to about 8.9 horsepower. However, the exact horsepower can vary based on the engine's design and efficiency.
To convert cubic centimeters (cc) to horsepower, you can use a rough estimate that 1 horsepower is approximately equal to 15 cc for gasoline engines. Therefore, for a 140 cc engine, the conversion would be about 9.3 horsepower (140 cc ÷ 15 cc/hp). Keep in mind that this is a general approximation and actual horsepower can vary based on engine design and efficiency.
CC is NOT correlated to Horsepower. Cc is merely the capacity of that engine, NO relationship to horsepower.
5.5 hp
There is absolutely NO relationship between HP and cc. Cc is simply the 'swept volume' of the engine. Horsepower has NOTHING to do with cc.