Re: VW & Audi cylinder head port info needed...

[ScottyCBoy@aol.com]

In a message dated 7/14/99 8:08:31 PM Central Daylight Time, JShadzi@aol.com 
writes:

<< Not to say its wrong, but just a thought.  Does'nt all this ceramic 
 coating keep a lot of heat in the combustion chamber, increasing the 
 liklyhood of detonation?  Just curious to see what you experience has been...
 Javad
  >>
Yes it does keep heat in the gas that is in the chamber but no it shouldn't 
increase detonation more than likely it lower the chances of it occuring. 
Detonation occurs when the fuel is ignited by another source (like a carbon 
deposit) other than the spark comming from the plug.. Since the walls of the 
chamber are insulated, there is less heat radiating from the chamber (from 
the previous air/fuel burn) to the incomming fuel/air mixture, therefore less 
chances predetonation or forming of hotspots on the chamber walls, but I've 
heard that due to cooler chamber surfaces, carbon forms more easily. On the 
other hand more heat is blown out the exhaust (to spool up a turbo or heat a 
catalytic) and puts more stress on your exhaust system. Possibly the only bad 
things about Ceramic coatings are the cost and possible clearance problems, 
or burning of the exhaust valves if they can't handle the extra heat...

Scott