I have been practicing for quite some times now. If I do it faster, I tend to misunderstand the question. Worse with Logical Reasoning. I am really really slow with Reading.
How are you doing on each section untimed? The verdict seems to be that you should focus first on accuracy to the point that you aren't missing more than 1 or 2 per section. Once there, get a timer and don't look at it at all, but time yourself so you can find out how long it naturally takes you to complete a section. With a clear time and goal in mind, begin to slowly decrease the amount of time it takes to complete a section.