CHASSIS ADJUSTMENT TIPS
The following text is intended as merely a guideline. We acknowledge there will be other opinions that may be as successful or possibly even more successful than those below. There is no one “right” method. As racers, you want to use information as a starting point and modify your practices based on your own experiences.
LOOSE AT CORNER ENTRY
1) Reduce right rear air pressure
2) Move right rear wheel in
3) Use a narrower right rear wheel or more offset
4) Raise chassis ride height front and rear
5) Take out tilt (raise left side)
6) Add right rear cross weight
7) Use less bar split
8) Use softer right rear bar
9) Drive car in straighter
LOOSE AT MID-CORNER
1) Reduce stagger
2) Raise ride height front and rear
3) Use softer rebound shock valving at left front and left rear
4) Use a higher gear
5) Take tilt out (raise left side)
6) Raise the forward end of the left rear radius rod
LOOSE AT CORNER EXIT
1) Reduce stagger
2) Raise front ride height
3) Use a higher gear
4) Use softer rebound shock valving at right front
5) Increase left rear cross weight
6) Use softer right front spring rate
7) Use softer spring rate at right front and right rear
8) Roll into the throttle smoother
LOOSE AT ALL THREE PHASES OF CORNER
1) Raise ride height front and rear
2) Take out tilt (raise left side)
3) Reduce stagger
4) Use softer spring rate at right front and right rear
TIGHT AT CORNER ENTRY
1) Increase right rear air pressure
2) Move right rear wheel out
3) Use less wheel offset at the right rear
4) Use wider right rear wheel
5) Add tilt (lower left side)
6) Use more bar split front and rear
7) Use a stiffer right rear torsion bar
8) Use softer left rear and left front torsion bars
9) Use stiffer shock rebound valving at the left rear
TIGHT AT MID CORNER
1) Increase stagger
2) Use a lower gear
3) Lower chassis ride height
4) Use more tilt (lower left side)
5) Lower left rear radius rod forward end
6) Use stiffer shock rebound valving left front
TIGHT AT CORNER EXIT
1) Increase stagger
2) Lower the front ride height
3) Use a lower gear
5) Use stiffer shock rebound valving on both front shocks
TIGHT AT ALL THREE PHASES OF CORNER
1) Increase right rear air pressure
2) Increase stagger
3) Use softer left front torsion bar
4) Move right rear wheel out
TAKING TILT OUT OF CHASSIS
1) Moves the centre of weight mass to the right. So more weight transfers to the right side of the car. Affects the car through the first half of cornering.
2) Raising the left side of the car up creates a positive arm angle at the left front. This makes the car tighter at corner entry by holding weight at the left front and right rear corners.
3) Raising the left side of the car up raises the height of the left side radius rod mounting point on the chassis at the left rear. Under acceleration, this creates more thrust loading on the left rear tire.
4) Increases the positive arm angle on the left rear and adds bar preload, so at corner exit the bar unloads harder on the left rear.
ADDING TILT TO THE CHASSIS
1) Moves weight mass to the left, which loosens up chassis at corner entry.
2) Increases torsion arm angle at the left front so the car turns in easier.
3) Lowers the height of the radius rod mounting point on the chassis at the left rear.
4) Takes out positive arm angle at the left rear so car won’t drive as hard at corner exit.
One way to improve is to figure out what works for you, to do this you need to keep a record of what you do. We have a setup record book that can help with this.