Kartrcr38

Hello, so I'm getting back into off road racing and am new to the boosted 13.5 class. I was wondering if anyone could give me some help with getting my 13.5 ballistic tuned in. Both of my local tracks are small indoor clay tracks... My first question is where should I start with my boost timing and rpm values? And my second question is what kind of timing should I start with on the motor endbell? And my third question is,how dose the gearing factor into this? Are you using gearing to control your motor temperature more than overall speed of the car?