Brooklyn Tech has their fall tour and open house dates posted on their calendar: https://www.bths.edu/apps/events2/view_calendar.jsp?id=0&m=9&y=2018
Looks like they’re hosting a bunch of tours, all at 4pm, and one open house on October 10 at 6pm.
Their first tour is the week after school starts. I’d stay away from the first ones. Not everyone, both student tour guides and your kids, is fully in the tour mindset that early in the school year.
Tour sign ups will go live in August. I’m thinking more towards the end of the month, when the school administration is back in the building. But, nice to see what’s available and what could work in your fall schedule.