Any Asian boys out there who took Calc BC senior year and got into top engineering schools?

Perhaps in specific elite high schools, but that is doubtful in general.

Only about 44 thousand students took the AP calculus BC exam in 11th grade or earlier in 2017, according to https://secure-media.collegeboard.org/digitalServices/pdf/research/2017/Program-Summary-Report-2017.pdf . Even if they were all Asian (which they are not), that would be far too few Asian high school students (there are about 3.6 million per grade).