Ceramic Turbines?

[Wizard]

"These are OEM exhaust valves from the EVO 8. They are filled with Sodium which allows a much greater heat dissipation over solid valves while saving some weight. These will drop right into your DSM 4g63 head."

My bad, I guess I really didn't read into them that much. Now I understand.

"Current forays into reducing compressor and turbine wheel inertia with advanced materials such as super plastics for compressor wheels and ceramics for turbines have been tried. These attempts have been somewhat less successful due to reliability problems. Nissan has applied these technologies successfully in production applications in the Japan market Skyline GTR and the Cima sedan. The main problem with lightweight ceramic turbine wheels is that the slightest contact with a foreign object such as a disintegrating spark plug electrode, casting sand from the exhaust manifold or even a big hunk of dislodged carbon from the motor can cause the ceramic to shatter. Nissans ultra light plastic compressor wheels tend to loose their blades when the boost is turned up beyond 12 psi or so. Having driven two vehicles with these turbos, the ceramic turbine equipped R32 Skyline GTR and a Maxima equipped with a Japan market Cima turbo, I can vouch that lag is very minimal. These turbos are an engineering marvel with their high tech ball bearing center sections, plastic compressor and ceramic turbines. Lag was so minimal with the Maxima it was almost impossible to tell if the car was turboed."

An article I found on compressor and turbine wheels. Also found a bunch on ceramic coated turbine housings and such. That would be similar to the exhaust wrap theory. Sorry for the misinformation.

Wiz