Knowledge of car modification modified suspension system

The car's suspension system is a very complex system, race parts inextricably linked between the various parts, of course, as owners do not need to know too much about esoteric theory, but if you want to modify properly to achieve the desired effect expected, some of the basic Theoretical knowledge is required, I hope you will not feel boring.

A car, regardless of its shape and size are only four points - that car four tires touch the ground, and only assumed the car and the tires were mounted it on the total weight of the people. Assume a FF vehicle (front-engine, front-wheel drive) of the total weight is 1000kg, when the "stationary" before and after each tire load were only 300 kg and 200kg (meter per side), but when the car is a "move" After each tire load appears on the subtle changes.

Simply put dynamic inertia in physics (we pressed the body in the car when the car accelerated backwards, it will forward the deceleration, will swing in the opposite direction of the perceived power steering), will make the car either accelerating, decelerating or turning will have weight transfer (weight transfer), and the result is to make the individual weight transfer wheel load surges, such as when the brakes on the ground originally borne by the rear wheel at the moment most of the weight will be transferred to the front wheels, the car had only 600kg heavier burden on the two front wheels of a sudden have to pay up to 800kg (or more) of vehicle weight; it's not, if the car at high speed downhill to abduct an urgent Right bent, and the driver suddenly loose throttle in the corners, a series of actions that would lead to the transfer of the right rear wheel weight load is zero (because it has a volley)! Left front wheel weight may be as high 800kg, while the left and right rear wheel may only 80kg and 120kg respectively, the load - this serious imbalance will make the left front tire overburdened and slip (ie Understeer, understeer) lose steering ability and straight forward. If the person driving this time depress the brake in hurried, more weight will make the already much weight to the rear forward, the result left rear tire due to load too cause pressure (down force) is insufficient, the friction insufficient to counter the lateral force left the car at the right bend produced, and produce left traverse (ie Oversteer, oversteering). The above is a simplified example, the transfer speed and weight distribution in the form of different designs and drive the car produced in the same situation is slightly different, but the basic principle is the same. Weight transfer is a double edged sword, improper control will make the car "pusher" - understeer, or "drift" - oversteering, such as increasing the pressure can be controlled properly individual tires, Leon 1.8 turbocharger so acceleration, steering or brakes more handy, detailed analysis and will have the opportunity to share experiences to talk about the racetrack.