Car Tuning Suspension and Handling Dynamics 2

Question 1

What is the primary purpose of an anti-roll bar (sway bar) in a suspension system?

Accepted Answer

Reduce body roll during cornering

Answer

An anti-roll bar connects opposite wheels and resists the body's tendency to lean (roll) during cornering by transferring force across the axle.

Question 2

When tuning for oversteer correction, which adjustment to the rear anti-roll bar would help?

Accepted Answer

Soften the rear bar

Answer

Softening the rear anti-roll bar allows the rear suspension to move more independently, increasing rear grip and reducing oversteer tendency.

Question 3

What does 'corner weight' refer to in chassis setup?

Accepted Answer

The static weight supported by each individual wheel

Answer

Corner weight is the static load borne by each individual wheel, and balancing these values improves handling balance and predictability.

Question 4

A car exhibits 'push' (understeer) when exiting corners. Which spring adjustment would most likely reduce this?

Accepted Answer

Soften the front springs

Answer

Softening the front springs increases front grip by allowing more front suspension travel, reducing the tendency for the front to push wide.

Question 5

What is 'bumpsteer' and why is it problematic?

Accepted Answer

Steering input caused by road bumps due to incorrect tie-rod geometry

Answer

Bumpsteer occurs when tie-rod endpoints don't follow the same arc as the suspension, causing the wheel to steer slightly as it moves up or down.

Car Tuning Practice Test