RE: Engine gets more pinch as it wears in??
VW,
Just throw that temp gun aside. It is just confusing you; giving you information that you don't need, which is not very accurate either.
It is just the latest means for hobby shops to get more of your money...
People have been successfully adjusting their glow engines by ear, for over 50 years, before temp guns became available...
It emerged, without there being a problem it could solve. Yet the sellers just try to convince you that there is a problem...
The problem is that many newbies become convinced and shell out cash, instead of listening to their elders and to their engines...
As far as any glow engine is concerned; if it runs right, it is at the right temperature; whether the water drop boils-off after 3 seconds, or after 10 and whatever value the temp gun is showing.
I do hope you did not run those two-and-a-half tanks idling...[X(]
EDIT: Grammar.