lowering 60 foot time

OK....i was pulling 1.87-1.89 60' with the old worn out springs.
I switched to 3000# S/S springs, and only gained a few 1/100. i think maybe there is maybe some engine tuning that needs to be done, but i don't remember what factors affect 60' the most....there is a list of things for each section of the track that change the characteristics for that section.

I am running 275/50-15 drag radials and have zero tire spin off the line. also have been playing with launch speed....seems to like higher staged speed, like around 3000 rpm

ALSO...something different from the old springs to the new springs is i ran about 10# more pressure because i was wearing the outsides of the tires off and haven't begun noticeable wear in the center yet

i am trying to find a way to post a video so you can see the current launches