Your letting time control the situation when your understanding of the passage should be controlling it. It's better to slow down and get 3 out of 5 right then to speed up and get 1 out of 5 right. The 4 wrongs will destroy your score compared 2.

Practice reading RC passages from other sources (GRE, LSAT, magazines, newpapers, etc) without timing and see what your "natural" pace is. Be sure you understand the passage completely. Use your finger on the page to match your pace and let that be your baseline speed. Then speed it up...just a little bit at first, skip a word or two (grammatical words that you do not need to read in my mind to recognize ...e.g. the, and, one, if, it, so). See if you can still understand completely. Then speed it up again and continue doing this. Use your finger on the page to force yourself to read faster by moving your finger faster.

Thanks for the suggestion.
I would better try these suggestions and be slow initially to find out my actual speed.

Thanks again!