Skip to content
English
Go to www.blueprintengines.com
  • There are no suggestions because the search field is empty.

What Is Ignition Timing and Why Does It Matter?

Proper ignition timing is critical for performance, drivability, and engine durability on any distributor-equipped BluePrint Engine.

 What Is Ignition Timing?

Ignition timing is when the spark plug fires in relation to piston position. The spark must occur before the piston reaches top dead center because the air/fuel mixture takes time to burn. Why Does Timing Advance Matter? Engines require more spark advance as RPM increases. This allows the combustion process to complete at the correct point in the power stroke for optimal power and efficiency. Too little timing can cause:

  • Poor throttle response
  • Reduced power
  • Lower fuel economy
  • Increased exhaust heat
Too much timing can cause:
  • Spark knock (detonation)
  • Hard starting
  • Starter kickback
  • Potential engine damage
How Do I Check Ignition Timing? Use a timing light to verify:
  • Initial timing at idle
  • Total timing at higher RPM
  • Proper operation of mechanical advance
  • Proper operation of vacuum advance, if equipped

Always follow the timing recommendations provided for your specific engine combination. 

 Frequently Asked Questions

Is more ignition timing always better?

No. Every engine has an optimal timing range. Adding more timing does not always increase power and can lead to detonation.

Can incorrect timing cause performance problems?

Yes. Incorrect timing can reduce power, affect drivability, and contribute to engine temperature concerns.

Does ignition timing affect fuel economy?

Yes. Proper ignition timing can improve fuel efficiency and throttle response.

Can incorrect timing damage an engine?

Yes. Excessive ignition advance can cause detonation, which may result in engine damage.