| UNDERSTEER CORRECTIONS |
OVERSTEER CORRECTIONS |
| Push, Plowing,
front tires slide out first. |
Loose, rear tires
slide out first. |
| Usually slight
understeer is safer. |
Oversteer can be
dangerous, especially at high speeds. |
| Raise front tire
pressure. |
Lower front tire
pressure. |
| Lower rear tire
pressure. |
Raise rear tire
pressure. |
| Soften front
shocks, Stiffen Bump. |
Stiffen front
shocks. |
| Stiffen rear
shocks. |
Soften rear
shocks. |
| Lower front end. |
Raise front end. |
| Raise rear end. |
Lower rear end. |
| Widen front track. |
Reduce rear track. |
| Install shorter
front tires. |
Install taller
front tires. |
| Install taller
rear tires. |
Install shorter
rear tires. |
| Install wider
front tires. |
Install narrower
front tires. |
| Install narrower
rear tires. |
Install wider rear
tires. |
| Soften front sway
bar. |
Stiffen front sway
bar. |
| Stiffen rear sway
bar. |
Soften rear sway
bar. |
| More front toe
out. |
More front toe in. |
| Reduce rear toe in
slightly. |
Increase rear toe
in. |
| Increase front
negative camber. |
Reduce front
negative camber. |
| Increase positive
caster. |
Reduce positive
caster. |
| Soften front
springs. |
Stiffen front
springs. |
| Stiffen rear
springs. |
Soften rear
springs. |
| May need more
front suspension travel. |
May need more rear
suspension travel. |
| Install wider
front wheels. |
Install wider rear
wheels. |
| Use softer front
compound if possible. |
Use harder front
compound if possible. |
| Use harder rear
compound if possible. |
Use softer rear
compound if possible. |
| Remove weight from
front of vehicle. |
Add weight to
front of vehicle. |
| Add weight to rear
of vehicle. |
Remove weight from
rear of vehicle. |
| Drive a different
line. |
Driver may be
going in too deep. |
| Use weight
transfer to your advantage. |
Driver may be
getting on the throttle too early. |
| High Speed.
Increase front wing downforce. |
High Speed,
Increase rear wing downforce. |
| Too much front
brake. |
Too much rear
brake. |
Vehicle is TWITCHY
at limit and
hard to keep ahead of in the steering department. |
Vehicle slides and
is easy to drive at limit but
does not corner to full potential. |
| Lower front and
rear tire pressures slightly. |
Raise front and
rear tire pressures slightly. |
| Suspension may be
too stiff. |
Suspension may be
too soft. |
| Shocks may be set
too firm. |
Shocks may be set
too soft. |
| Tires may be old
or hard. |
Roll centers may
be too high. |
| Vehicle may not
have enough suspension travel. |
Lower vehicle. |
| Vehicle may have a
toe problem front or rear. |
Tires may be too
hard. |
| Increase negative
camber front and rear if possible. |
Widen track front
and rear. |
A
properly set up vehicle will usually push slightly on corner
entry,
be fairly neutral at the apex (STEADY STATE) and exhibit slight
power oversteer on corner exit.
Tight courses may require more oversteer, fast tracks
understeer.
Items needed: Accurate tire pyrometer, tire gauge, notebook and
tape measure. Suspension information books. |
