I was in my wife's 2013 Justa convertible the other day, and noticed her Scan Gauge 2 was displaying HP. Found the HP setting on my SG2 in my 2011 MCS, now monitoring horsepower, or am I? If so, I am doing pretty well with my mods at 91k miles. This morning, about 60 degrees, I saw 214 HP on a nice 2nd gear pull, WOT, close to the redline. How accurate is this HP reading, if anyone knows? How does it calculate HP? Thanks in advance!