Your car probably seems slow because it's sitting there motionless while the wheels are spinning!
Seriously, a 9x2 is WAY too much rip for a 2wd buggy (unless you've converted it to a touring car & are running on carpet!)
Try a 13x2 or 13x3 if you can get your hands on one. Car will be smoother & easier to drive, still while having more than enough RIP off the corner & jumps.
You will see it in your laptimes too!
Whatever you do..............HAVE FUN when you pull the trigger!