I think TS eamcet 2018 is not started yet, Generally Ranks will vary every year that depends on level of paper i.e., easy or medium or tough, You can visit Careers360's college predictor and rank predictor to know which college you will get.
I am sharing the links of rank and college predictors find them below"
https://engineering.careers360.com/articles/ts-eamcet-rank-predictor
https://engineering.careers360.com/ts-eamcet-rank-predictor
https://engineering.careers360.com/ts-eamcet-college-predictor
Hope you found this helpful..!!!
All the best...!!!