to do that you would need to change WHEN it gets triggered. A larger gap might only delay the flame arrival by half a nano second, not near enough for what you are wanting to do & if the available voltage is greater than the required voltage to jump a certain gap then all is good there as it will fire but a minimal gap is needed at WOT as cyl psi is higher & coil rise time available is less and sparks blacken the brass contacts & any spark outside of the combustion chamber is wasted energy & kudos to you on doing this, Smokey Yunicks take was to individually dial in each cyls timing/CR for max power, treating each cyl as an individual powerplant. Tho for our apps octane would be the limiter on the DCR.