In my head, I just keep thinking "aluminum melts at 1221 F" as I'm driving. I don't have an EGT gauge yet, but I am running a stock engine right now. Once I finish the non-stock it will have an EGT gauge.
On an engine I didn't care much about (not a D24 - an Isuzu 1.8L) would run about where you say yours is, and never melted.
Spenser
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