It might be Dear School Gang Leader.
I know the manga but not the name. It's about a girl in a school of guys. The school focuses on mechanics. A guy (Shou is his name?) catches her attention. The girl is actually really scary when mad. Etc. Etc. They both like each other and their school wins this mechanical contest for best car. I hope this is the right manga
LOL, I thought it was another series. Glad you found the name :D
To be honest all i remember is it about a girl that goes to a technical high school with a bunch of boys