Thanks for the insight. Believe it or not, the gentleman running the f-series at eTown was quite explicit about TAG or bust. There just isn’t enough participation apparently to support additional engine options for our area. The Sunday race had only 7 guys for masters tag. This isn’t the “gearup” race series, as far as I can tell. That series does seem to be more serious. As far as club racing, there doesn’t seem to be any. Maybe in NJ the f-series (state championship?) is sort of lower key, with f-series gearup being more for the faster folks?
What’s interesting is that the tag karts didn’t feel much “faster” than the iame 100 engine I have experience with. What makes it harder are the stickier tires, at least to me.