Adding a CAC to an engine will...

• A. Automatically increase power
• B. Do little to increase power; only more air and fuel increase power
• C. Decrease power
• D. Cause engine misfire

Answer: (B)

A CAC cools the compressed air before it enters the engine, which makes that air denser and able to carry more oxygen per liter. With denser air, the engine can burn more fuel and produce more power, but the cooler itself doesn’t create that power on its own. The gain comes from having more air and fuel available and properly managed by the engine’s fueling and timing. So, adding a CAC does little to increase power by itself; only more air and fuel increase power. It won’t inherently decrease power and it won’t by itself cause a misfire.