What is the ignition advance angle in degrees?

[DeTyler]

Generally, the ignition advance angle is around 6-12°C. More detailed information about the ignition advance angle is as follows: 1. Theoretically, the minimum ignition advance angle is 0 degrees. To prevent the air-fuel mixture from igniting during the power stroke (which would cause power loss), it is usually set above 5 degrees. This is also the angle required for starting speed. If ignition occurs too early, it can cause knocking, hinder piston movement, reduce efficiency, and increase thermal load, mechanical load, noise, and vibration. Therefore, late ignition should be avoided as it makes gas work harder, increases fuel consumption, reduces efficiency, and causes louder exhaust noise. Both early and late ignition can affect engine efficiency. 2. Besides engine speed, the optimal ignition angle is influenced by many factors, such as cylinder temperature and pressure. Higher cylinder temperature and pressure result in faster combustion of the air-fuel mixture, requiring a smaller ignition advance angle. Factors affecting cylinder temperature and pressure include engine compression ratio, ambient temperature, cylinder temperature, and load. 3. Higher gasoline octane ratings indicate stronger anti-knock capability, allowing for a larger ignition advance angle. The air-fuel mixture ratio also plays a role: both overly rich and lean mixtures burn more slowly, requiring an increased ignition advance angle. The air-fuel mixture ratio is mainly influenced by throttle opening and altitude.

[LeDeclan]

I think the ignition timing advance isn't a fixed degree; it dynamically changes during engine operation. From my perspective as someone experienced in vehicle tuning, the advance angle typically ranges between 10 to 40 degrees, depending on the engine type and operating conditions. For example, it might only be 10 to 15 degrees during low-speed driving or idling, but can increase to 30 or even 40 degrees during high-speed acceleration. The ECU continuously monitors factors like RPM, air intake, and temperature to adjust it in real-time, aiming to ensure more complete fuel combustion, enhance power output, and reduce fuel consumption. If set improperly—for instance, advancing too much—it can easily cause knocking issues, which may damage the engine over time. I recommend that car owners schedule regular professional maintenance to check if the ignition system is functioning properly. This is especially crucial for older or modified vehicles, as maintaining a reasonable value can extend engine lifespan.

[SanLuke]

Speaking of the degrees of ignition advance angle, I can tell from my driving experience. In daily driving, this thing is definitely not a fixed few degrees—it keeps changing all the time. The range is roughly between 15 to 35 degrees, depending on what the car is doing. For example, in city traffic jams, the angle is smaller; when overtaking on the highway, the ECU advances it more to boost power. If you accidentally mess with it, the car might run rough, feel sluggish, or guzzle more fuel. I remember once when my car had unstable ignition, I took it to the 4S shop for a check, and they found the advance angle was off—the technician adjusted it, and it was back to normal. Don’t underestimate this—it affects both performance and safety. Regularly check it with a diagnostic tool to avoid bigger issues.

[KingstonRose]

How to set the ignition advance angle in degrees? From a driving perspective, it can optimize the car's performance. The actual range is between 10 to 40 degrees, with the angle increasing as the RPM rises. My habit is to use an OBD tool to briefly check real-time data and confirm everything is normal. The ECU handles automatic adjustments, so don't worry about setting a fixed value.