Hey Manjunath! There is no specific marks above which or after crossing which you can get to the specific rank. According to last year a candidate scoring 230+ ultimately ends up scoring around 2500 rank. But this completely depends upon the difficulty level of paper and number of students applied for the paper. Hope this may help you.

See if you want to score a rank below 2500 in JEE main then you will have to get atleast 340 marks. This is what my experience and the previous year marks to rank ratio tells. You will have to work very hard to attain the rank, you have only one year in hand. Work hard and you can definitely achieve it.

Good luck