I have 2 sets of CHT gauges. One of them is from
www.westach.com and features 4 gauges in one housing with thermocouples on each spark plug. I also have another quad gauge that has probes that fit in the lower side of each cylinder.
When I did the testing I was working with the late Joe Locicero. He sent me a 24 probe thermocouple and harnass set that had 6 position switches for taking reading from 24 locations at once in real time with 4 gauges. This is the harnass he used to effectively design the DTM shroud.
So yes, the information was gathered with accurate gauges, just the two CHT gauges aI have in Quad form cost me over 1,000 bucks. I take what I test seriously, thats why I post so firmly, as I know the truth.
I did the TI test with TIII tin a long time ago, when I first got the dyno. I did not log very much data about it, it was a TI and I was just playing around..