http://twoguysrally.com/2008/04/24/how-engines-respond-to-air-temperature/ Two guys on a journey into the Rally Racing world Wed, 08 Feb 2012 14:27:06 +0000 http://wordpress.org/?v=2.5 http://twoguysrally.com/2008/04/24/how-engines-respond-to-air-temperature/#comment-493 Two Guys Rally » Blog Archive » Aerodynamics: Drag Sun, 10 Aug 2008 05:22:44 +0000 http://twoguysrally.com/?p=34#comment-493 [...] First up is drag. Drag is a force opposing motion. In the case of aerodynamic drag, it’s the force applied against the car as it moves through the air. There are a few variables that affect the aero drag. The faster you go (velocity, or V), the more drag there will be. Also, more total surface area and frontal area increases drag. The frontal area (Af) can be thought of how much area the car takes up when viewed from the front. Or if the car is moving sideways, the side area would be used, or some combination thereof. There is a coefficient of drag (referred to as Cd) that is a function of the body shape. The final important factor is fluid density. The density of air varies with altitude, temperature and humidity, as I have pointed out in the past. [...] […] First up is drag. Drag is a force opposing motion. In the case of aerodynamic drag, it’s the force applied against the car as it moves through the air. There are a few variables that affect the aero drag. The faster you go (velocity, or V), the more drag there will be. Also, more total surface area and frontal area increases drag. The frontal area (Af) can be thought of how much area the car takes up when viewed from the front. Or if the car is moving sideways, the side area would be used, or some combination thereof. There is a coefficient of drag (referred to as Cd) that is a function of the body shape. The final important factor is fluid density. The density of air varies with altitude, temperature and humidity, as I have pointed out in the past. […]

]]> http://twoguysrally.com/2008/04/24/how-engines-respond-to-air-temperature/#comment-209 Turbochargers! - Part 3 at Two Guys Rally Sat, 21 Jun 2008 04:19:45 +0000 http://twoguysrally.com/?p=34#comment-209 [...] This ultimately means more power, if it is not immediately obvious why, I have gone over the effects of temperature on engine performance in more detail [...] […] This ultimately means more power, if it is not immediately obvious why, I have gone over the effects of temperature on engine performance in more detail […]

]]> http://twoguysrally.com/2008/04/24/how-engines-respond-to-air-temperature/#comment-37 Turbochargers! - Part 1 at Two Guys Rally Tue, 29 Apr 2008 01:55:39 +0000 http://twoguysrally.com/?p=34#comment-37 [...] increases the amount of air flowing into an engine to create more power. If you read the article on temperature and engine power, you’d see that compressing air (by increasing the ‘boost’) increases the density. [...] […] increases the amount of air flowing into an engine to create more power. If you read the article on temperature and engine power, you’d see that compressing air (by increasing the ‘boost’) increases the density. […]

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