Originally Posted by andrewdoherty
I use a similar temp gun. I make sure the lens is clean every week though. I have found lint on the lens from carrying it around in my pocket causes errant readings. I then kinda slide the temps gun up and down the length of the can until I read the highest temp. Each motor brand seems to have a hot spot. Novaks are on their purple ring, my speedpassions are at the end and the same with the hacker losis I've run. I try to do this immediately after my run.
The center ring on a Novak motor will give you the highest temp reading on your gun but this is not the hottest part of the motor.
The center ring reads the hottest due to being a flat color instead of shinny metal. Put your finger on the motor and you will notice that the endbell section is dramatically hotter than the center ring.
Most people are getting temp readings on their Novak's 20-30 degrees lower than the actual temp. Trust your finger not the temp guns on Novak's.
You can put some black enamel paint on the motor to get a better reading.
Damn emissivity of shinny metal objects.