Trouble Shooting Guide

Brake System Trouble Shooting Guide

 

Loss of Pedal During Race

•Inadequate ducting - reposition or increase ducting
•Incorrect or bad master cylinder - Change master
•Undersize brake system - Change caliper or master
•Boiling fluid - Replace fluid, flush system

Brake Drag

•Bad master cylinder - Replace master cylinder
•Warped rotors - Replace rotors with new ones
•Calipers not square to rotors - Reposition calipers
•Frozen position - Rebuild calipers, replace o-rings

Have to Push to Hard on Pedal

•Too large of master - Put a smaller one on
•Wrong pad material - Use a more aggressive brake pad
•Frozen piston - Rebuild calipers, replace o-rings

Spongy Pedal or Bottoms Out

•Air in system - Bleed brakes
•Faulty master - Replace master
•Calipers not square to rotor - Reposition calipers

Oscillation Feed Back in Pedal

•Excessive rotor run-out - Replace rotor
•Build up on rotor and pad - Clean rotors and replace pads
•Crack rotors - Replace rotors
•Excessive front bearing clearance - Check and tighten spindle nut

 

Chassis Trouble Shooting Guide

LOOSE ON ENTRY

1...Stiffen up compression on right front shock
2...Stiffen up right front spring rate
3...Soften up the left front spring
4...Use a larger stabilizer bar
5...Use more pre-load on stabilizer bar
6...Decrease the caster
7...Lower the panhard bar
8...Decrease the rear brake bias
9...Decrease the rear stagger
10...Increase the diagonal weight percentage
11...Decrease upper control arm angle on rear end

PUSH ON ENTRY

1...Soften up the front springs
2...Raise the panhard bar
3...Increase caster
4...Increase the left front spring rate
5...Decrease the right front spring rate
6...Increase the rear tire stagger
7...Increase rear brake bias
8...Use a smaller stabilizer bar
9...Decrease pre-load on the stabilizer bar
10...Decrease the diagonal weight percentage

LOOSE OFF

1...Decrease the right rear spring
2...Decrease right rear shock
3...Increase left rear spring
4...Lower the panhard bar on both sides
5...Increase the split in the panhard heights
6...Increase stabilizer par pre-load
7...Use a larger stabilizer bar
8...Increase the angle of the upper trailing arm
9...Increase the rear weight bias

PUSH OFF

1...Increase the right rear spring rate
2...Use a smaller stabilizer bar
3...Decrease the pre-load on stabilizer bar
4...Decrease the split on the panhard bar
5...Decrease the left rear spring rate
6...Increase the rear stagger
7...Decrease the angle of the upper trailing arm
8...Decrease the rear weight bias

 

Shock Trouble Shooting Guide

LOOSE ON ENTRY

1...Increase compression RF
2...Decrease rebound LR
3...Increase Compression both fronts
4...Increase rebound RR

PUSH ON ENTRY

1...Decrease compression RF (soften until both are equal)
2...Decrease compression both fronts
3...Soften springs RF then both fronts

LOOSE IN MIDDLE

1...Increase rebound LF
2...Decrease rebound RF
3...Decrease rebound LR
4...Increase compression LR
5...Reduce stagger
6...Soften RR spring
7...Soften LF spring

PUSH IN MIDDLE

1...Increase rebound RF
2...Decrease rebound LF
3...Stiffen spring LF or RF
4...Increase compression RR
5...No Pre-Load on bar—with driver in car

LOOSE OFF

1...Decrease rebound RF
2...Increase rebound LF
3...Increase compression LR
4...Decrease compression RR
5...Increase rebound RR
6...Increase Wedge
7...Soften spring RR
8...Reduce Stagger

PUSH OFF

1...Increase rebound both fronts
2...Decrease rebound LF
3...Increase compression RR
4...Decrease rebound RR
5...Decrease Wedge