I met a guy at Oshkosh who had an RV 6 with a Lyc 360.  He had the piston tops, 
exhaust ports and exhaust pipes ceramic coated.  The cooling air inlets are 2 
1/8 diameter and  he has no problems with cooling issues.  It appears keeping 
the heat in the exhaust flow is the key.  Interesting stuff.
Roger Baalman
rbaalman at cox.net

> >
> > That means if we don't alter anything else but reduce absorption, can
> > we see a significant drop in cylinder head temps?
> >
> > Maybe an effective thermal barrier coated exhaust port makes a
> > difference? Anybody tried that yet?
> >
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