What are the comparative voltages of stock and Nology?
If there is a significant difference, then you could probably get a hotter spark with a wider gap. BUT, that spark would be of shorter duration. Sometimes, and I think especially with carburetion, a cooler, longer lasting spark will give you better burning than a short, hot spark. And even more so if you have enriched your fuel mixture significantly. Here's how it works (exaggerated and simplified)). When you have well vaporized fuel mixed with air at the proper ratio, a short hot spark will ignite the whole mess instantaneously. When your fuel is flying around the cylinders in big drops, a short, hot spark may not ignite it if it doesn't hit a droplet of fuel, a longer spark will hit the fuel and thus cause ignition.
That's why magnetos with their extremely long, albeit cooler spark have been the ignition of choice for top fuel dragsters, with all those big drops of nitro-methane flying around the cylinder, you want to be sure to hit one with the spark.
