so i own a 2015 wrx and have practiced launching it this weekend and kinda disappointing I'm not sure at how many RPMs to rev it to i have tried at 3-4k and i get wheel spin then it hesitates and then catches back up and speeds up and only once I'm not sure what i did but had some wheel spin then went spright forward. not sure how specific that is but any feedback is good not sure how many rpms or how much gas to give it after please help out fellow subie friends!