Turbo Bypass

[Zack]

Jack,

> Pressure, volume, and temperature are interrelated - The volume of  the
> intercooler is fixed, so as temp drops across the intercooler
> pressure drops also. Called Gas Law.

Ooops...
Pressure drops in the intercooler are caused by flow restrictions. 
The only thing that you can deduce from the Gas Law (in combination 
with the principle of Conservation of Mass) is that the flow velocity 
of the cool air exiting the intercooler is lower than that of the hot 
air going in the inlet.
	The equation you are referring only applies if the temperature of 
the gas throughout the volume under consideration is uniform (or 
nearly so), and this is not even remotely true for the intercooler as 
a whole.  If you can't apply the law to the intercooler as a whole, 
then the only approach left to you is to apply the gas law to 
infinitesimal little packets of gas of volume dV as they move through 
the intercooler, but then of course, you're faced with the problem 
that your little packet of gas is no longer bounded on all sides by 
the rigid walls of some "container", and thus, you have no basis for 
assuming that dV stays the same as the little pocket of gas travels 
it's way through the core.... and that's the whole point.  dV does 
NOT stay the same.  The gas contracts as it moves along, and thus, 
the whole argument about how the pressure "must" drop as a result of 
the temperature drops goes in the toilet... because it's wrong!:-)

Z