This is probably a stupid question, but here goes:

Is there an optimum EGT for different engines?  I would think as long as they were burning 100LL, and piston driven (i.e. all parameters equal except for 4 cylinder or 6 cylinder ) the temp would be the same across the board assuming optimum fuel burn (proper weight to weight air & fuel)

That is the long way of asking:  I am going to order a digital EGT for my O-320, are they going to ask me to set redline parameters similar to the way I had to set them on my tachometer, or are EGT gages set for "standard" peak temps that apply to all piston driven engines.  The reason I ask not only for a figure but for peak temps as well, because this gage has green, yellow and red zones to coincide with the temp readout. Thanks in advance.

Steve