True or False: Supercharging can increase an engine's power output by 20-40%.

Supercharging indeed can increase an engine's power output significantly, often in the range of 20-40% or more. This effect is achieved by forcing extra air into the engine's combustion chamber, allowing for more fuel to be burned, which in turn increases the engine's power output.

The effectiveness of a supercharger is particularly noted in situations where the engine naturally aspirated would struggle to draw in sufficient air at higher RPMs or under load. By providing a boost, supercharging allows an engine to produce more power without changing the fundamental design of the engine itself.

While the exact increase in power may vary based on the specific engine design, tuning, and operating conditions, the general consensus is that supercharging is an effective method to enhance performance, often achieving the touted increases in horsepower and torque. Thus, saying that supercharging can increase an engine's power output by 20-40% is accurate and reflects common outcomes observed in practice.