the TB will be FAR in excess of coolant temps, and would be far worse without that coolant flowing through it. For example, Matt'* 97 SSEi had a TB temperature of 230 degrees F when he arrived for WCBF06
I still beg to differ. :P
I can see it if you are running hot 400 F EGR exhaust gases thru there.....I'm not.....Matt and you are.
Is it any wonder why the coolant ports run right beside the EGR passage.
The TB coolant heating is there strictly for cold climate icing prevention. The cooling is for the EGR..........I'm sure you have measured how hot your exhaust gases can get.
Even under 15 psi boost conditions my SC outlet temps do not exceed 200 F amd cools down immediately to 130 F.
I measured temps when I was in Corvallis during the hot weather.