Originally Posted by Maximo

Breakin is an exception of course !...

but you better be sure to calibrate the gun to the cooling head...these guns will read differently from engine to engine, so be sure the numbers you are using are actually accurate ! ..... However tuning to temps is the wrong way to tune... first being that there is no set temp for these engines to run, and secondly unless you calibrate the gun to the head you have no idea how accurate the gun is really reading..... Every time I go running the guys having the tuning issues are the guys using their temp guns......