Hey!

With 80 percentile in jee mains, your rank would be around 1.5 lakhs to 1.7 lakhs, and as per previous years records you can get seat in mechanical, civil or any other branch in HBTU but there are no chances to get cse there. You can also use the tool link giben below to predict your eligibility in different colleges

https://engineering.careers360.com/jee-main-college-predictor

Thank you