Normally speaking, setting caster is very difficult, if not impossible. If there is more positive caster, the dynamic wheel pressure will remain on the inner wheel, thus increasing grip at the front of the car. While cornering, positive caster causes the following effect. As caster increases, steering becomes heavier. You might think: the more positive caster, the better. More positive caster provides more ‘feedback’ while driving, especially without power steering. The outer wheel will get more negative camber, while the inner wheel will get less negative camber. Positive caster also affects the camber while steering. It has suddenly become unpredictable and unstable. The cart is now a lot more difficult to push (and could even lock up). If you were to turn around these wheels by 180 degrees, then they would have negative caster. To better understand caster, we illustrate it using the front (i.e. steering) wheels.Ĭaster is, among other things, necessary for straight line stability, also called ‘self-steering effect’. Generally speaking, caster only applies to the front (i.e. This will usually be in the range of 1 to 10 degrees positive. The ‘settings range’ is often no more than +0.5 and -1.5 degrees. This usually results in -½ to -2 degrees of camber (negative).įor most street cars, there is limited room to adjust the camber. This means that for street / track day cars, a compromise must be found. Depending on the type of race, qualification, sprint race or endurance race, different settings can be chosen. We also want the tyres to last as long as possible, but for a race car, they only need to last long enough to reach the finish flag. The reason is that the passenger car has more suspension travel, a softer suspension and more body roll. This will be more difficult for a passenger car than for a race car. Ideally, the tyres should always be at right angles (perpendicular) to the road, under all circumstances. This is due to the contact surface becoming smaller. In case of extreme negative camber, the tyres’ grip on the road surface could be reduced. Why It causes more wear on the inside of the tyres while driving in a straight line. Question Is negative camber always a positive phenomenon? Tyres will wear more evenly when the camber is properly adjusted. Seen from ride height, more and more negative camber will occur during the compression of the suspension (depending on the wheel geometry). This force wants to push the wheels toward the centre of the car. Furthermore, negative camber causes a force to be applied to the wheels that we call ‘camber-thrust’. ![]() This results in more grip and stability during cornering. Negative camber will compensate for this effect, causing a bigger contact surface between the tyres and the road (‘footprint’). This can lead to more positive camber on the wheels (depending on the wheel geometry). When cornering, the body work of the car will start to roll/tilt. PART 2: HOW DO CAMBER, CASTER, POSITIVE AND NEGATIVE TOE INFLUENCE THE DRIVING BEHAVIOUR?Ĭamber is usually from 0 degrees to 6 degrees (negative).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |