@Valk.......What rollout are you running with those tires??
12 to 13 sec track screams for a low rollout.
Had a national race last weekend on a fairly short track and we were running with a 10.5 and boost,turbo and timing a rollout of 37.
I think you need to start with about 45 and work your way from there.
Let the motor rev a bit and you will see it accelerates better.
regards Roy