What is a good temperature

That timing seems late. I'm no expert, by any means, but isn't 2.5 BTDC pretty late? Later timing runs hotter, right? (I seem to recall reading that in Corky Bell's book on turbo charging, but maybe it was only in reference to the exhaust temperature because so much of the burn is after the exhaust valve opens.) What is your timing with advance?

I'm probably totally wrong... just curious what the experts have to say about that timing.