Ceramic Coatings and EGT

[Frederic Breitwieser]

> at idle went from around 900 F to 1200 F.  The mixture is
> the same and the cam is larger than the last engine which
> would open the exhaust valve earlier, so that would bump
> the EGT a little.

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.

At idle, our radical twin-turbo Buick V6 displayed 1100-1200
deg, typically towards the higher side, and at much higher
RPMs the temperature actually went down 50-100 degrees.

It also might be that with the modifications you have made,
larger cam, more displacement, your engine especially if you
have not modofied your carb or EFI, might be running lean. 
Engines under a lean condition tend to display a hotter EGT
as well as higher water temp.  

-- 
Frederic Breitwieser
Bridgeport, CT 06606

http://www.xephic.dynip.com
1993 Superchaged Lincoln Continental
1989 500cid Turbocharged HWMMV
1975 Dodge D200 Club Cab (soon to be twin turbo 440)
2000 Buick GTP (twin turbo V6)