Ceramic Coatings and EGT

[Shannen Durphey]

Matt Beaubien wrote:
> 
> Frederic,
> 
> > ceramic coatings reflect or isolate I guess is a better word
> > the metal that's coated from the explosions that occur in
> > your engine.  Considering these explosions are a few
> > thousand degrees, an exhaust temperature of 900-1200 is not
> > unreasonable, especially if the compression is high.
> 
> Just a slight correction. As the CR goes up, EGT's come down. The engine is
> more efficient so less heat is rejected. One the Bush GN engines (I think?),
> they have a restriced CR and have trouble with exhuast valve life. More so
> than the unrestricted engines.
> 
> Matt Beaubien
> mbeaubie at ualberta.ca
> 3 x 510
> 1 x 300ZXT
Thought I heard that about the nascar truck engines, too.
Shannen