4 Valve Head: Single Central Spark Plug vs Dual Spark Plugs

[David Redszus]

Do I understand you correctly: Specific heat goes hand in hand with thermal conductivity for (solid) materials? So the higher the thermal conductivity the higher the specific heat and vice versa?

Never heard of that. Could you explain this more detailed please?

Material…..….Copper..….Alum……4130…..SS304….…Ti
Thermal cond…226……..…99……..…25…….…9.4…...…4.2
Spec Heat…….0.092…...0.230…..0.120…..0.120…..0.135
Density……....0.323….…0.098……0.283…..0.290……0.160

Aluminum appears to be the oddball material.

Ok? What units are these numbers in?

TC = BTU/hr/ft^2
SH = BTU/lb Fdeg
De = lb/in^3