Glen, you posted all those pics, and yet not one photo of your 2001 IH 4x4? You've been breathing too many welding fumes. You know we want to see it;.
OBS Guys, even if the 7.3L intercooler only subtracts 50 degrees from EGTs, reducing EGTs should not be the sole barometer to judge the utility of the intercooler by.
The real reason for an intercooler is to reduce INTAKE air temperature, not just exhaust temperature. An intercooler can be expected to reduce charge air temperature by about 100-150 degrees, and this translates into an increase in air density, which enriches the oxygen molecule content ratio for the volume of air forced into the cylinder, which results in a better burn and more explosive force per power stroke.
That's what an intercooler is for.
The increase in power per powerstroke will no doubt generate more combustion waste heat, which can increase EGTs, depending on flow rate through the engine and turbine exhaust housing. So I'm not at all surprised to only see a 50 degree reduction in EGTs with the addition of an intercooler. But EGT reduction isn't the point of the installation. The point is to reduce intake air temperature, so as to increase air density.
