With this engine that was my first 4 passes, so yes you are correct. These tires are about 5 years old and with the other engine it was 1.9’s, 12.9’s at 105 - 108.How many passes have you made with the car? It sounds like maybe more practice will help.
That tire with the worst possible suspension should do way better than 2.2. I would think with launch technique practice alone, you could get to a 1.90 or better.
I’m pretty sure with maybe factory rear springs and cal-tracs I could get it to 1.6 and low 11’s.