Car Tuning Car Trivia 5 — Questions and Answers
Question 1: What is 'brake bias' or 'brake balance' adjustment, and why is it important on a track car?
- The front-to-rear brake force distribution that affects stability and stopping performance under load (Correct answer)
- The difference in brake pad compound hardness between axles
- The ABS sensitivity setting that determines intervention threshold
- The caliper piston size ratio between front and rear brakes
Correct answer: The front-to-rear brake force distribution that affects stability and stopping performance under load
Brake bias controls how braking force is split between front and rear axles; improper balance causes early rear lockup (oversteer) or understeering front lockup, both reducing lap times.
Question 2: Which American muscle car was nicknamed 'The Judge' and was produced by Pontiac?
- Pontiac GTO The Judge (Correct answer)
- Pontiac Firebird The Judge
- Pontiac Trans Am The Judge
- Pontiac Bonneville The Judge
Correct answer: Pontiac GTO The Judge
The Pontiac GTO 'The Judge' was a performance package introduced in 1969, named after a catchphrase from the TV show Laugh-In, featuring a 400 cubic inch V8 engine.
Question 3: What is 'coilover' suspension, and what advantage does it offer over stock springs and shocks?
- A combined coil spring and shock absorber unit that allows ride height and damping adjustment (Correct answer)
- A solid axle suspension system using coil springs instead of leaf springs
- A hydraulic suspension system that uses coils to accumulate pressure
- An electronically controlled suspension that replaces passive coil springs
Correct answer: A combined coil spring and shock absorber unit that allows ride height and damping adjustment
Coilovers integrate the spring around the shock absorber body with adjustable perches, allowing precise ride height adjustment and often offering adjustable damping for track or street tuning.
Question 4: What does 'LSD' stand for in the context of automotive performance, and what does it do?
- Limited-Slip Differential — transfers torque to the wheel with more traction (Correct answer)
- Lateral Stability Device — reduces body roll in high-speed cornering
- Low-Speed Differential — optimizes torque delivery at low vehicle speeds
- Load-Sensing Differential — adjusts torque based on suspension compression
Correct answer: Limited-Slip Differential — transfers torque to the wheel with more traction
A Limited-Slip Differential (LSD) uses clutch packs, gears, or viscous fluid to limit the speed difference between driven wheels, transferring torque to the wheel with better grip.
Question 5: In forced induction, what is 'compressor surge' and how does it affect turbocharger longevity?
- Violent airflow reversal in the compressor wheel that causes rapid bearing wear and noise (Correct answer)
- Excessive boost pressure that over-spins the turbine wheel past its safe speed
- Heat soak from the exhaust turbine that warps the compressor housing
- Cavitation in the turbo oil feed line that starves bearings of lubrication
Correct answer: Violent airflow reversal in the compressor wheel that causes rapid bearing wear and noise
Compressor surge occurs when pressurized air reverses through the turbo compressor (when the throttle suddenly closes), causing violent pulsations that stress bearings and can destroy the turbocharger over time.
Question 6: What was the claimed horsepower of the Dodge Viper SRT-10's V10 engine when the car launched in 2003?
- 450 hp
- 500 hp (Correct answer)
- 510 hp
- 550 hp
Correct answer: 500 hp
The 2003 Dodge Viper SRT-10 featured an 8.3-liter V10 producing 500 horsepower and 525 lb-ft of torque, making it the most powerful production Viper to that point.
Question 7: What is 'cam phasing' or 'variable valve timing' (VVT) technology designed to achieve?
- Optimize valve timing across RPM ranges to improve both low-end torque and high-RPM power (Correct answer)
- Physically swap camshaft profiles between street and track modes at the push of a button
- Eliminate the need for a timing belt by using magnetic cam positioning
- Control valve lift height independently of valve open duration
Correct answer: Optimize valve timing across RPM ranges to improve both low-end torque and high-RPM power
Variable valve timing adjusts the camshaft position relative to the crankshaft while the engine runs, optimizing when valves open and close at different RPM points for broader powerband and efficiency.
Car Tuning Car Trivia 5
What is 'brake bias' or 'brake balance' adjustment, and why is it important on a track car?