Paul, I've been doing temperature measurements in all sorts of conditions on both of my cars and other L67'*, and I can tell you under WOT full-boost conditions, the TB will actually gain heat from the inlet of the SC. Computer analysis also confirms this.

Also, after extended driving in hot conditions, 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. Yet his coolant temp was slightly under 200. If that 200 degree coolant hadn't been there, his TB temps would have been far higher.

Mr Wren, I can't recall if you applied that 'special SC coating' to your TB or not.
Time to go see if I can find that again. It doesn't sound like a bad idea atm.

Paul forgets he lives in a northern coastal climate. He forgets to check his temps down here where the rest of us live.

Haro applied the coating to his TB. Not me.

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.

Paul, bypassing the EGR increases combustion temps. You're just trading heat for heat.

If you compare your setup to the other 99% of us, it'* pointless. A STANDARD TB with EGR intact will run COOLER on hot days or sprints WITH the coolant ports intact.

I took my throttle body off for the first time to clean 'er up for the track tomorrow(and was it filthy mess there was behind there ), and cant believe that little notch that the coolant runs through actually does any cooling at all... :? ..I was just suprised I thought that it would actually be running THROUGH the TB more.....anyways, I'll just save up for a big *** intercooler.

Will, you ar saying that because of the heat transfered from the */C, the water pasage actually helps. But in a N/A engine that does not apply, right?
& I know is not the same engine, but like I stated earlier. In my other car wish has a Tuned port injection engine the diffrence was day & night. I couldnt leave my hand in the TB for more thatn one or two seconds, because of the heat. & now is only warm to the touch.

Another benefit of blocking off the EGR is no more exhaust soot contaminating your TB. Mine stays licky clean all the time. :P

If you add the intercooler, it will block off both the EGR and the coolant passages.

....but as Bill stated, your combustion temps will be a little warmer due to the lack of exhaust gases diluting the air fuel mixture...........although I haven't noticed any difference. :?
I'll have to check my other engine after 25 years of running it without the EGR to see if any valves are burned.

Paul, my combustion temps are LOWER than yours BECAUSE I have an EGR. It reduces combustion temps.

Do lower intake temps automatically mean lower exhaust temps?

EDIT---
Does the supercharger make an ex-amount of degrees? Like it can only generate so much heat? Say intake temps are 80* and supercharger raises temps into cylinder(IDK, just a number) 300* for 380*. Then air temps drop to 60* then the air would still only be raised 300* for 360* total into cylinders.

Not sure where I am going with this just thought it maybe was a pertinent question.