I do test my FTP but never pay any attention to the LTHR estimate that Trainerroad spits out, if I do it that way. Looking at a couple of recent workouts with intervals at sweetspot or around FTP, I'd guess something like 176. For the bike, obv.

Average HR for this race was 197, max 210. 3.8 mile off road running race. Don't know what the hell is going on with Garmin, all of the graphs are full of gaps..
http://connect.garmin.com/...n/activity/110978587