If you opt for private colleges, there are plenty of chances. But getting govt. colleges in Delhi will be tough a bit. As the competition is at highest level now-a-days, there is less chance to get seats easily. You should opt for private colleges if you do not want to drop a year and prepare. You may opt for following private colleges.

1. Mharaja Agrasen Institute of technology
2. Maharaja Surajmal Institute of Technology
3. Amity school of Engineering and Technology
4. Bharatee Vidyapith's college of engineering

However you have another chance to get a list of prescribed colleges against your rank. You just need to use JEE MAIN COLLEGE PREDICTOR. Click the link below, put necessary information and get result instantly.

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

All the best.