550 to 650

Of course.

One thing to do is work on efficiency, everything from the way you read words in word problems to the way you organize the math you are doing. That way you get more done and it's almost a guaranteed savings of time. I mean, you don't have to figure out the math faster. You just have to be in the habit of being efficient.

Another thing you can do is get really clear about how the clock should look after a certain number of questions. That way you will be quicker when checking the clock and have more time to answer questions.

I am not sure what you mean by "very weak with quant", but you either you know or you can figure that out. Then methodically tackle weak areas. These weak areas won't necessarily be things like probability that seem relatively difficult. Things like exponents, algebra and arithmetic can trip you up or suck up precious minutes,and getting better at handling things like those can be the best investment of time. Also a person can have weak areas that are less obvious than others. For instance it may be obvious to you that you get queasy when you see a sequence question. It may be less obvious that you are not all that good at handling something else, maybe absolute value. Both could use work, and since the second may show up multiple times on one test, focusing on that may be more important.

In any case you could spend a couple of days' study time on any area in which you feel weak and just keep driving that score up bit by bit.

One way to do this is to use an online question bank or self study course that provides categorized quant questions.

Finally to be clear, if you wanted to, you could work on this until you scored 51 on quant and 51 on verbal. While that might not be worth doing, I just want to make sure you realize that and don't think that there is some ceiling to how high you can score. In reality, you can score as high as you want to. Just have to develop the skills to do so.