Car Tuning Cheat Sheet 2026

The 30 highest-yield Car Tuning facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. During a high-load tuning session on a dynamometer, the knock sensor detects detonation. How will a modern Engine Control Unit (ECU) typically respond? → Retard the ignition timing
2. How frequently should tires be rotated in order to prolong their lifespan? → Every 5,000 to 8,000 miles
3. Where can you discover the finest advice for YOUR vehicle if you're unsure where to begin when building a maintenance schedule? → Your vehicle’s owner’s manual
4. If a thermostat fails stuck in the open position, what is the most likely result? → The engine runs below optimal temperature, hurting fuel economy and emissions
5. Which type of brake rotor is generally considered most resistant to cracking under the extreme thermal stress of competitive racing? → Slotted rotors.
6. What does 'row count' describe in radiator terminology? → The number of coolant tube layers stacked through the core depth front-to-back
7. Which sensor data channel is most useful for analyzing brake performance during a track session? → Longitudinal deceleration (G-force) combined with brake pressure
8. What is the primary function of adjusting 'Ignition Dwell Time' in an engine's tune? → To ensure the ignition coil has sufficient time to charge for a strong spark.
9. What is 'wheel spacer' used for in performance tuning? → To push the wheel outward from the hub, widening the track width
10. What is the function of a sandwich-plate adapter in a performance oil cooling setup? → To divert oil through an external oil cooler while keeping the stock filter in place
11. How can driving with low tire pressure be dangerous? → All of the above
12. What does 'ET' or 'offset' indicate on a wheel specification? → The distance in millimeters from the wheel's centerline to its mounting face
13. What is 'brake clearance' a consideration when choosing aftermarket wheels? → Ensuring the wheel's inner barrel provides sufficient space around brake calipers
14. What is the role of a boost controller solenoid in a turbocharged car's interior electronics? → To bleed off wastegate actuator pressure to raise or lower boost levels on command
15. Which wheel construction method is generally the lightest for a given strength level in performance applications? → Forged monoblock
16. What creates the spark that ignites the fuel? → Spark plug
17. A component of the cooling system is the heater. → False
18. What does pressure testing a cooling system primarily verify? → That the system retains pressure without leaks from hoses, gaskets, or the radiator
19. What component prevents impurities from entering the combustion chamber? → Fuel filter
20. Can my car be chip-tuned if it doesn't have a turbo? → Possible
21. What is the term for the unwanted steering of the wheels that occurs as the suspension moves through its vertical travel, independent of driver input? → Bump steer
22. What does an aftermarket shift light indicate to the driver? → The optimal RPM point at which to upshift for maximum power
23. What function does the thermostat serve in an engine cooling system? → It controls the temperature at which coolant begins flowing to the radiator
24. Which alignment setting, when increased (more negative), typically improves cornering grip in a performance build? → Camber
25. Which of the following DOES NOT contribute to tire longevity? → Checking the tread on your tires with the “penny test.”
26. What does a 'lambda trace' in engine data logging reveal about combustion quality? → Whether the air/fuel mixture is achieving the target ratio under all operating conditions
27. Why might a performance-oriented tuner choose a tire with a treadwear rating of 200 over one rated 500? → The softer compound offers higher grip levels, especially on track
28. A tuner is aiming for maximum power on a turbocharged gasoline engine. Which air-fuel ratio (AFR) is most appropriate to target under full boost? → 11.5:1
29. How much power will chiptuning give me? → 20% and 30%
30. What is the primary purpose of an intercooler in a turbocharged engine? → To reduce the temperature of compressed air before it enters the engine