Can I increase my score?

Hello all,

I've just started taking full length timed tests, starting with preptest 42 and plan on completing 43-69 up to the October test. I am currently scoring around the low 160's. My big issue is timing with the Reading Comp. I'm consistently scoring -2 or less on games, and around -4 or -5 on LR. Can I improve my score enough to get around a 170? I feel if I can just improve on my RC timing within the next 25 or so preptests I take, I should be all set for October. Thanks for your help!

Chris