"but as compression increases doesn't the amount of spark have to increase to ignite the fuel/air mixture as well as in increasing the gap?"
ANSWER: You would have to define "amount of spark"????? What is true is that as compression increases, the VOLTAGE across the spark plug gap has to rise higher BEFORE it fires its spark (which ignites the fuel)
Then you state: with a stronger coil you can increase the gap and get more fire in your cylinder as well.
ANSWER If the gap is increased (just like if compression is raised, read the articles in my post) that likewise increases the voltage necessary for the plug to fire. YES its true some after market so called "high voltage" coils have the capacity/ability to achieve higher voltage (as may required in high compression racing engines) buttttttttt regardless of HV or stock coil, the voltage only rises high enough to fire the plug so the HV coil wont fire at any higher voltage then the stock coil. ITS JUST THAT IF COMPRESSION IS HIGH OR GAP REAL WIDE (read my articles) THE HV COIL HAS THE ABILITY TO ACHIEVE THE NECESARY HIGHER VOLTAGE...
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