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What are Coilovers and how they work

Suspension

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Spring Rate

The spring rate is a component in setting the vehicle's ride height or its location in the stroke. Vehicles which carry heavy loads will often have heavier springs to compensate for the additional weight that would otherwise collapse a vehicle to the bottom of its travel (stroke). Heavier springs are also used in performance applications when the spring is constantly forced to the bottom of its stroke causing a reduction in the useful amount of spring travel which may also lead to harsh bottoming.

Springs that are too hard or too soft will both effectively cause the vehicle to have no suspension at all. Vehicles that commonly experience loads heavier than normal have heavy or hard springs with a spring rate close to the upper limit for that vehicle's weight. This allows the vehicle to perform properly under a heavy load when control is limited by the inertia of the load. Riding in an empty truck used for carrying loads can be uncomfortable for passengers because of its high spring rate relative to the weight of the vehicle. A race car would also be described as having heavy springs and would also be uncomfortably bumpy.

 

Coilovers

A coilover is an automobile device, short for "coil (spring) over strut". It consists of a shock absorber (British: damper) with a coil spring circling it. The shock absorber and spring are preassembled as a unit prior to installation, and are replaced as a unit when the shock absorber has leaked. This provides for optimal damping without torsional loads. Some coilovers are adjustable for ride height and  hardness as well using a simple threaded spring perch similar to a nut.

Lowering Springs

Why are they so popular and do they really improve the handling of a car. In theory, when you lower your car, you also lower it center of gravity therefore reducing body roll, thus improving its handling. However, handling characteristic of the car are not only determined by the center of gravity. You also have to consider the dampening system, spring rate, condition of the road, side-walls of your tires, unsprung weight, tire grip, geometry of the spring and so on.

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Suspension


  
 
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