Ilmu Ceduk
Here are some stuff I ceduk from a cool site. Hope the owner doesn't mind.
Springs
A car with soft springs will experience a lot of body roll in fast turns, but it will also dive very hard under heavy breaking and squat a lot while accelerating. Stiffer springs yield less grip on that end of the car, and conversely, softer springs yield more grip. On small, high-frequency bumps, stiff springs will make the car bounce, resulting in a loss of grip. So you need softer springs, because they allow the tires to stay in contact with the ground. On smooth tracks however, stiff springs are the way to go.
Damping
Damping should always be matched to the spring ratio: never run a very stiff spring with very soft damping or a very soft spring with very stiff damping. Damping that's a bit on the heavy side will make the car more stable; it will slow down both the vehicle's pitch and roll motions, making it feel less twitchy. Note that damping only alters the speed at which the rolling and pitching motions occur, it does not alter their extent. So if you want your vehicle to roll less, adjust the anti-roll bars, or the springs, but not the dampers. Something you can adjust with the damping rate is the speed at which the suspension rebounds: if a car with soft springs but hard dampers is pushed down, it will rebound very slowly, and a car with stiff springs and light damping will rebound very quickly.
So the car with the soft springs and hard damping will tend to want to continue turning when the steering is straightened. It will also tend to continue running straight when steering is first applied; it will feel generally unresponsive, yet very smooth. The car with firm springs and soft damping will be very responsive: it will follow the driver's commands very quickly and aggressively.
Droop
Limiting suspension droop has another interesting effect: you can use it to reduce traction rolling. A car with less droop will have a lower CG as it turns, which is exactly what you need in an eternal struggle against traction rolls. Often it's a better solution than using stiffer springs and harder tires; it's even better than reducing ride height or adding anti-roll bars.
Springs
A car with soft springs will experience a lot of body roll in fast turns, but it will also dive very hard under heavy breaking and squat a lot while accelerating. Stiffer springs yield less grip on that end of the car, and conversely, softer springs yield more grip. On small, high-frequency bumps, stiff springs will make the car bounce, resulting in a loss of grip. So you need softer springs, because they allow the tires to stay in contact with the ground. On smooth tracks however, stiff springs are the way to go.
Damping
Damping should always be matched to the spring ratio: never run a very stiff spring with very soft damping or a very soft spring with very stiff damping. Damping that's a bit on the heavy side will make the car more stable; it will slow down both the vehicle's pitch and roll motions, making it feel less twitchy. Note that damping only alters the speed at which the rolling and pitching motions occur, it does not alter their extent. So if you want your vehicle to roll less, adjust the anti-roll bars, or the springs, but not the dampers. Something you can adjust with the damping rate is the speed at which the suspension rebounds: if a car with soft springs but hard dampers is pushed down, it will rebound very slowly, and a car with stiff springs and light damping will rebound very quickly.
So the car with the soft springs and hard damping will tend to want to continue turning when the steering is straightened. It will also tend to continue running straight when steering is first applied; it will feel generally unresponsive, yet very smooth. The car with firm springs and soft damping will be very responsive: it will follow the driver's commands very quickly and aggressively.
Droop
Limiting suspension droop has another interesting effect: you can use it to reduce traction rolling. A car with less droop will have a lower CG as it turns, which is exactly what you need in an eternal struggle against traction rolls. Often it's a better solution than using stiffer springs and harder tires; it's even better than reducing ride height or adding anti-roll bars.
posted by --iffil-- at 11:38 PM
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