Our local tracks finally came down with a mandate on stock classes, just as I picked up a viper 17.5 and 2wd buggy

Before the ruling got handed down I was playing with timing on the esc v. gearing the hell out of it just to see what felt better and still gave me reasonable temps. I see there are a couple tuning rotor options out there... What are people running for stock buggy with no esc timing? Are the rotors going to make much of a difference? Would I be better served with the torque type rotor to have more bottom end squirt with high gearing, or the rpm type to get a little more top end?

I haven't had a chance to test things out at our outdoor track, but geared 30/72, 30* on the can at our local very tight, technical indoor track I was able to put some decent laps down but lacked the bottom end grunt to clear some jumps. 26/72 with 25* esc timing and 20* on the can had much better results there, but those settings don't really translate to the larger outdoor track.

What kind of gearing and mechanical timing should I be looking at on a b4.1 w/ 17.5 running no esc timing? Thanks