This video provides an overview of engine compression and how it relates to ignition timing. What is compression ratio, preignition, knock, and ignition timing. A crucial concept in engine tuning is the relationship between compression pressure (which is affected by the throttle plate) and ignition timing. This is vital for maximizing power and efficiency while preventing engine knock. ​Compression Pressure vs. Throttle Plate ​The static compression ratio of an engine is a fixed, mechanical prop