Ok, the air temp here today was 18 degrees with a wind chill around -8 to -12 below zero. Now everyone is always talking about how a CAI will net you more HP. How about the fact that the car is sucking in all that cold cold air "naturally" because of the ambient temp outside? Does anyone have proof that more HP is gained when it is extremely cold outside?

 

I don't have actual graphs to show you but I definately feel it when the air is cooler. Here in Arizona it can be 90 degrees today and 60 tomorrow. I've driven my GS on a day when it all of a sudden got cool and windy. Man is that fun . Instant power with no under the hood modifications .

 

its the fact that colder air is more dense than warm air. the denser the air the more you can pack in the combustion chamber.

 

I find my car running sorta sluggish when its that cold outside and using alot more fuel. I think the optimum temperature for running a car is about 55-65*

 

Not to mention that CAI is also designed to free up restriction(s) and increase airflow over OEM air intake. Definitely cooler air is more dense than warmer air. The new Infinity G has new ducting that increases/forces airflow above 50MPH to gain a few extra HP.