Front end loaders; turning the pressure up on the hydraulic pump, putting bigger cylinders on it will increase the lifting capacity but may well overload the loader frame, lift arms, and the front axle of your tractor. Then what? Increasing the power (hp) of a motor is easy with aftermarket gimmicks. If you want to see what can happen to a motor by increasing performance, watch the drag races some weekend. Marvel at the performance those guys get from passenger car motors until they explode. Thats not to say upping the horsepower a few clicks will blow a tractor motor or using premium gas instead of regular. How simple and cost effective is it to just get the machine that matches your job?