So my thinking is heading to:

- header: coat inside and outside 1700 degree
- turbo: coat outside 1100 degree
- exhaust: inside and outside 1100

This seem appropriate?

I want to create the most heat = Most Pressure. I cool things down, I may defeat the heat to HP ratio purpose.

Dunno, recommend you go to Performance Coatings page, they got this stuff down. Their satin ceramics will even permanently adhere to titanium after it is baked on.

Privateer,

Thanks. One of the few, maybe only site I've seen so far, that talks about turbo internals!