Tuning Guide

Thanks To:

Roger Kraus Tires Inc.
2896 Grove Way
Castro Valley, CA 94546

Understeer
: Push, plowing, front tires slide out first. Usually slight understeer is safer than neutral balance.

    How to correct:

  • Raise front tire pressure
  • Lower rear tire pressure
  • Soften front shocks
  • Stiffen bump
  • Stiffen rear shocks
  • Lower front end
  • Raise rear end
  • Widen front track
  • Install shorter front tires
  • Install taller rear tires
  • Install wider front tires
  • Install narrower rear tires
  • Soften front sway bar
  • Stiffen rear sway bar
  • More front toe out
  • Reduce rear toe in
  • Slightly 
increase front negative camber
  • Increase positive caster
  • Soften front springs
  • Stiffen rear springs
  • May need more front suspension travel
  • Install wider front wheels
  • Use softer front springs
  • Stiffen rear springs
  • May need more front suspension travel
  • Install wider front wheels
  • Use softer front compound
  • If possible 
use harder rear compound
  • If possible 
remove weight from front of vehicle
  • Add weight to rear of vehicle
  • Drive a different line
  • Use weight transfer to your advantage
  • Increase front wing downforce
  • Too much front brake bias

Vehicle is TWITCHY at limit and hard to keep ahead of in the steering department

    How to correct:

  • Lower front and rear tire pressures slightly
  • Suspension may be too stiff
  • Shocks may be set too firm
  • Tires may be old or hard
  • Vehicle may not have enough suspension travel
  • Vehicle may have a toe problem front or rear
  • Increase negative camber front and rear if possible

Oversteer: 
Loose, rear tires slide out first. Oversteer can be dangerous, especially at high speeds.

    How to correct:

  • Lower front tire pressure
  • Raise rear tire pressure
  • Stiffen front shocks
  • Soften rear shocks
  • Raise front end
  • Lower rear end
  • Reduce rear track
  • Install taller front tires
  • Install shorter rear tires
  • Install narrower front tires
  • Install wider rear tires
  • Stiffen front sway bar
  • Soften rear sway bar
  • More front toe-in
  • Increase rear toe-in
  • Reduce front negative camber
  • Reduce positive caster
  • Stiffen front springs
  • Soften rear springs
  • May need more rear suspension travel
  • Install wider rear wheels
  • Use harder front compound
  • If possible 
use softer rear compound
  • If possible 
add weight to front of vehicle
  • Remove weight from rear of vehicle
  • Driver may be going in too deep into turns
  • Driver may be getting on the throttle to early exiting turns
  • Increase rear wing downforce
  • Too much rear brake bias

Vehicle slides and is easy to drive at limit but does not corner to full potential

    How to correct:

  • Raise front and rear tire pressures slightly
  • Suspension may be too soft
  • Shocks may be too soft
  • Roll center may be too high
  • Lower vehicle
  • Tires may be too hard
  • Widen track front & rear track