Car Setup Notes Springs Run as soft as practical for maximum grip Hard: Reduced Grip Increased reaction Soft: Increased Grip Decreased reaction Soft Front, Hard rear = Oversteer Hard Front, Soft rear = Understeer Anti-Roll Primary effect in slow turns Front Hard = Steering precision in slow turns, understeer, bad turn-in, more precise handling Soft = Grip in slow turns, oversteer, better turn-in, less precise handling Rear Hard = Reduce Understeer in slow turns, oversteer, better turn-in Soft = Reduce Oversteer in slow turns, understeer, worse turn-in Large effect on relative L/R tire temp, Soft front/hard rear may balance Run zero or low in wet conditions Harder increases tire ware Dampers (Shocks/Anti-shock) Dampers work in speed rates (Fast (low numbers) and Slow (high numbers)) not Soft or Hard Slow Dampers Slow F+R = Slow weight transfer, Corner stability Fast F+R = Fast weight transfer, Good grip Slow F, Soft R = Corner entry+exit oversteer Fast F, Hard R = Corner entry+exit understeer Fast Dampers Fast Rebound will normally need to be faster than Fast bound. Slow F+R = Reduced bounce over bumps and curbs Fast F+R = Good grip over bumps and curbs Slow F, Soft R = Bump understeer Fast F, Hard R = Bump oversteer Bound/Rebound (Mainly for Slow dampers (weight shift)): Front Bound Slow = Slower weight shift under Brake, Reduce oversteer on Turn-in Fast = Faster weight shift under Brake, Better Turn-in response + Reduce understeer Rebound Slow = Slower Nose Lift under Accel Fast = Faster Nose Lift under Accel Rear Bound Slow = Slower weight shift under Accel Fast = Faster weight shift under Accel Rebound Slow = Slower Nose Drop under Brake, Better Turn-in response + Reduce understeer Fast = Faster Nose Drop under Brake, Reduce oversteer on Turn-in Slow dampers . Left turn Oversteer Right turn Oversteer Corner Entry Increase FR Bump, Decrease RL Rebound Increase FL Bump, Decrease RR Rebound Corner Exit Increase FL Rebound, Decrease RL Bump Increase FR Rebound, Decrease RR Bump . Left turn Understeer Right turn Understeer Corner Entry Decrease FR Bump, Increase RL Rebound Decrease FL Bump, Increase RR Rebound Corner Exit Decrease FL Rebound, Increase RR Bump Decrease FR Rebound, Increase RL Bump Differential Power High = Good propulsion out of corners, power understeer, Snap oversteer with overpower Low = Poor propulsion out of corners, power oversteer, easier but more frequent traction loss with overpower Coast High = Stable braking, lift off understeer Low = Unstable braking, lift off oversteer Pre-load (low throttle range) High = Nervous transitioning from braking/acceleration, easier to balance turns with throttle, harder to keep stable accelerating from slow turns, easy to spin under power, easier to break traction with rapid power lift-off Low = Less responsive transitioning from braking/acceleration, easier to accelerate from slow turns but tendency to understeer Wing High = Good grip, Oversteer Low = Good speed, Understeer Tires After running in (at least two minutes) Target temp = 70..90c Inner edge should be approximately 5c hotter than the Outer edge, increase camber to increase difference Centre temp should be roughly in the middle of the Inner and Outer temps, an increase in tire pressure will raise the centre temperature (may require a softening of the springs to counter the effect on handling) Tire pressure: Front Higher = Oversteer Lower = Understeer Rear Higher = Understeer Lower = Oversteer Brake Duct Target = 300..600c range while running Bias Target = Front+Back Lock simultaneously Caster Increase for harder steering + feedback or Understeer Decrees if too firm or unstable in high speed turn Large effect on tire temperature distribution Camber Always run negative cambers Higher neg angle will increase the temperature difference between the inner and outer tire edges Too high will result in loss of grip Toe in Front + for line stability - for sharp turn-in Rear + for line speed - for rear end stability in turns Ride height Front High = Understeer Low = Oversteer Rear High = Oversteer Low = Understeer
Posted on: Mon, 17 Jun 2013 15:31:28 +0000