Also, colder air is more dense, so you can run a bigger main fuel jet to get more power, and in Vees, we always run a cold air intake, sometimes even a ram-air setup. There is much argument over the effectiveness of ram-air under, say 100MPH.
But, we're talking MPG, not power, so the big thing would be to make the job easier to get the air into the car, so use a K&N filter, or at least a clean air filter!
