Spring rates need to be setup in relation to car weight, weight distribution and chassis / suspension stiffness. Stiffer springs provide more control but can lead to harsh unpredictable car behaviour during directional changes or wheel spin when accelerating when setup too stiff. Springs control the weight transition during directional changes and between front and rear wheels during acceleration and braking. Softer springs provide more grip but can lead to sluggish car behaviour during directional changes or locking front wheels under braking and when setup too soft. Older cars and muscle cars require higher spread (>1 per 1%) while race cars require lower spread. for 51% front weight distribution the front ARB should be 1 higher than the rear ARB. This is however not as simple as 1:1 distribution according to weight distribution because springs and dampers also affect car balance during turning.Ī good starting point for ARB distribution for RWD cars is 1 per 1% weight distribution difference to 50%, i.e. race cars).įront and rear ARB distribution has a relation to weight distribution, so in general a car with more front weight should have also higher front ARBs than rear. Decrease ARBs for cars with less weight and / or more rigid chassis (e.g. Increase ARBs for cars with more weight and / or less rigid chassis (e.g. Likewise the less the car weights the lower the ARBs can be set.Ģ0/20 is good middle ground for modern road cars around 3000lbs and 50% weight distribution and corresponds to an ARB stiffness of around 63%. the more rigid the chassis is the lower the ARBs can be set. Generally ARBs need to be setup in relation to chassis stiffness and vehicle weight, i.e. Stiff ARBs provide more control during cornering but can result into harsh and unpredictable car behaviour when setup too stiff. Soft ARBs provide more grip during cornering but can result into sluggish car behaviour when setup too soft. Stiffer ARBs reduce body roll and thus provide less weight shifting during cornering. Softer ARBs create more body roll leading to more weight shifting to the outer wheels. Anti-roll bars (ARBs) control the weight transition between left and right (or inner and outer) wheels during cornering.
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