cuatrokoop

Its more of a symantics thing than anything else.

Ones I've seen for V8's are liquid cooled vs air cooled due to packaging (can't get sufficient air flow over the core). Plus, with liquid cooling, you can get well below ambient air temp ;-)

Bernes

I just got the lecture
"the cooler the air is the more power you get"

Dan McBoost

I understand your point. But.

I turbo itself could never get to 2000 degrees. At that point the complete turbo would melt. Look at the link below.

If a turbo is generating 2000 degrees of heat, you are running very lean and just melted/destroyed some vital internal parts ( even melted the turbo and head! lol). I run up to 25 psi and my exhaust temp never gets above 750-800 degrees celcius (~1500F). This is taken with the temp sensor pre turbo where it is the hottest external point of tempature ( hottest is inside the combustion chamber).

The turbine side of a turbo does get hot. The impeller side does not evenly share that heat. After a hard run I can get out and touch my compressor housing and it is only engine bay "hot".

Temps from 300-400F ish would be considered normal for intake charge temp before a intercooler, IF running 30PSI or more.

20psi would net 250-275F ish.

5psi would make a intercooler useless. I know people that have added a turbo to stock car, with a boost pressure of 5-6.5 without a intercooler. EGTs are low, and the car is faster, with a visciously fast spool up. NO pressure loss, no length of piping.

This DOES all depends on turbo size, and effciency rang, etc.. But we are not talking about any huge differences.

There is a scientific measurement for calculating air temp vs pressure. It does not correlate prefectly with turbos because of the vast number of other factors with a turbo.<ul><li><a href="http://www.emainc.com/radnor/material.htm">http://www.emainc.com/radnor/material.htm</a></li></ul>