Originally Posted by DaveKoehler
You can and have tried larger but I will say .018-.025.
Might check your pop off plate if you have coughed it previously.
Dave Koehler
http://www.koehlerinjection.com
This is the voice of reason here, any time you increase pressure in the cylinder either with higher compression, NOS or forced induction you need to increase the intensity of the spark either by using a smaller gap or higher energy ignition. Smaller gaps are the easiest place to start.