I'm retuning my freshly rebuilt V1 today and it has got me thinking. I am asking this question sort of in the perspective as a skeptic, but I want to hear what people have to say.
Now with tuning most engines, I know EGTs tell a great story about how well everything is performing. Realistically speaking (at least not as of yet), EGT readings on a moped can't easily be obtained without a lot of money/time/modification, etc.
So basically what I'm asking is this: what ARE the head temperature readings exactly? Do they REALLY give an indication of the performance/health of an engine like EGTs? Are the "sub ~400*F" measurements arbitrary or are they linked to theory (SCIENCE haha)? And lastly, how can one trust a measuring device that has a bunch of ambient air blowing right by its sensor?
I'm interested in your responses, so gurus: please chime in.