Increase volumetric flow rate using a longer nozzle
Yes, the Volcano or the Super Volcano allow for larger flow rate (typically when using larger nozzles), that is where they were designed for. Just the nozzle will not help you, you need this larger nozzle shaft to be inside a Volcano heater block, else you cannot transfer the heat.
According to measurements from Metaform, the volumetric flow of a Volcano hotend is larger than the regular E3D V6 hotend.