Throttle Body Coolant Bypass (with pics), Want to bypass the coolant flow to your Throttle Body on you 5SFE? Options

[VavAlephVav]

this is what I was unsure of at first, but now I'm convinced that the actual idle control is just by the computer. and the bi-metal spring will just break it open if it were to freeze up.

yet I really doubt this will effect the incoming air temp much. it only warms up the bottom part of the throttle body and the air passing through there is moving too fast to be warmed up much I'd think.

[Langing]

coolant runs through your throttle body making it very warm.. the down side to any engine it taking in warm air, you car wants the air it takes in to be as cold as posible, so bypassing the throttle body helps with taking away that warm water going around it.

sorry for the newb question, but what is this for in the first place? i dont get it!

When air is 'colder' it is more dense, and thus contains more molecules of oxygen per unit of volume than warmer air, so more oxygen is available to the combustion process when intake air is colder. Also, the step-function reduction in air pressure as it moves through the throttle body into the 'vacuum' of the intake plenum is said to lower the air temp. This is in line with the statement by 4-eyed-freak. Can anyone point me to a good technical discussion of the dynamics of this process that explains it in more specific detail that spells out how much heat a warm throttle body adds to intake air temp, and how much cooling is provided by the pressure drop, along with other relevant info, like how fast is heat is being transferred from a warming block to the throttle body conducted through the intake 'pipes', and specifies what is the ideal air temp as it enters the cylinder?

How do these dynamics change as engine moves from cold to warm, and as throttle moves from idle to WOT?