The cold air induction system is based on the theory that cold air has __________ density.

The cold air induction system is based on the theory that cold air has __________ density.

• A. Higher
• B. Lower
• C. Same
• D. Unknown

Answer: (A)

Cold air is denser, meaning there are more air molecules in a given volume when the air is cooler. The cold air induction system uses this by drawing in cooler air, so for each intake stroke more oxygen enters the engine. With more oxygen available, more fuel can be combusted efficiently, which can increase power and improve throttle response. If air were less dense or had the same density, cooling the intake air wouldn’t provide a gain, which is why the correct idea is that cold air has higher density.

Cold air is denser, meaning there are more air molecules in a given volume when the air is cooler. The cold air induction system uses this by drawing in cooler air, so for each intake stroke more oxygen enters the engine. With more oxygen available, more fuel can be combusted efficiently, which can increase power and improve throttle response. If air were less dense or had the same density, cooling the intake air wouldn’t provide a gain, which is why the correct idea is that cold air has higher density.