[Supras] Problems....

[Hacker J]

While
copper has a much lower melting point that Pt or Ir, it also has a
higher thermal conductivity. Hard to say whether the better thermal
conductivity would offset the lower melting point. A Cu/Pt/Ir alloy
would probably have the best of both worlds.



Melting points:



Copper: 1085 degC

Platinum: 1769 degC

Iridium: 2446 degC 



Thermal Conductivity:



Cu: 401 W·m−1·K−1

Pt:71.6 W·m−1·K−

Ir 147 W·m−1·K−1

		
	
		
		
		
		
		
	
	


	
		


		
		
		
		 
	
	
	
	
		
		
			

----- Original Message ----





iridium sits higher than platinum. the metal is much stronger than platinum and actually allows a better spark using a smaller electrode. Like stated before, Iridium plugs are more like a set-and-forget type piece that you dont have to worry about unless theres a problem with yer engine. prob change them like every 50k miles.
 
in short, think all characteristics of platinum but last longer.
 
-Sean









 
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