* Engine modifications: Are there any performance modifications like a different camshaft, carburetor, or exhaust system? Modifications significantly impact ideal timing.
* Fuel type: The octane rating of the fuel influences how well the engine can tolerate advanced timing. Higher octane allows for more advance.
* Engine condition: Wear and tear on the engine can affect the optimal timing. A worn engine might need slightly less advance to avoid detonation.
* Altitude: Higher altitudes require less timing advance.
Instead of searching for a single number, you should:
1. Consult your owner's manual: This is the best starting point. It will provide the recommended base timing for your specific engine and year.
2. Use a timing light: This is the only reliable way to accurately measure and adjust your ignition timing. You'll need to find the Total Timing specification (not just base timing). This often involves setting the base timing then bringing the engine up to a certain RPM (often 2000-2500) while observing the timing marks.
3. Start with the recommended base timing: Then, *carefully* and incrementally adjust the timing while monitoring for:
* Detonation (pinging): This is a harsh, metallic knocking sound indicating the timing is too advanced. Back it off immediately if you hear it.
* Performance: You might find slightly increasing or decreasing the timing from the base can improve performance (acceleration, power). However, do this in small increments.
4. Consider a professional tune-up: If you're not comfortable working on your engine yourself, take it to a qualified mechanic. They can properly diagnose your engine's needs and set the timing accurately.
In short: Don't rely on a single number found online. Use your owner's manual as a guide and employ a timing light for precise adjustment. Prioritize avoiding detonation above all else.
