Ignition Timing Rpm
Pictured above are spark plugs. Spark plugs receive electricity on the order of 40,000 to 100,000 volts from the ignition coil and distributor. You can specify when they fire.
What you do:
Choose the engine rpm you want to set your timing at.
This is meant to be flexible, so you can choose the rpm for yourself. Recommended rpms to choose from are 3000 - 5000 rpm.