Howdy T2P. Nope! If your ride is running smoothly a new coil will NOT do anything to that ride. All a coil does is build up energy until enough is stored to make a spark across the plug. It takes the same energy from ANY coil to make that spark. So the brand or style of a coil does NOT matter.. You will get the same spark from all coils.
Now if you build an engine with high compression and much higher revs than our little guys normally work. Our normal coils may not be able to build up enough energy to make a spark at those high compression and revolutions.. So at that time another coil may be in order.
Here's the deal. As long as your engine is running normally the way you drive another coil will NOT do anything for you.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />