Lesson 1 in drag and race. Never make a change to your machine if you're not happy with your result!
When you know you are consistently getting the same time within 0.05 of a sec then you know it's time for an upgrade. Until then the machine is better than you.
As the wise-one says, work on your launches. You are made or broken by the time your front wheel has done 3 full rotations.
Now VmAX hey.....let me at the bastard!