Throttle body coolant bypass

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23 February 2012, 12:39 PM

#31

stedee

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Quote:

Originally Posted by joz8968

Thing is, even if the TB is very hot (coolant fully up to temp/hooning/summer, etc.) would the charge of air actually conduct the heat from the TB to any significant degree anyhow - seeing as the, transient, mass of air going past the TB at any point in time is very small?!

What I'm trying to say is, does it have actually have time to conduct significant heat from the TB, as it momentarily passes through it?!....

i would say yes it does because the air is constantly passing through it, obviously a small effects though, but imagine how a fan heater works. the air is only in contact with the element for a small ammount of time too plus stops even more heat transfer to the inlet mani

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23 February 2012, 12:54 PM

#32

ALi-B

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Quote:

Originally Posted by stedee

I think you've been a bit too simple with the science with that comparison: The element on a fan heater has a much bigger surface to air ratio (which is why its often wound around a ceramic holder or webbing). Also more important the temperature differential (delta T ) is massive as the element gets alot hotter (near red hot) which for Nichrome wire (nickle+chrome alloy) is about 1000 degrees C!

At that temperature the inlet manifold would have melted into a pool of liquid...along with the heads, block and pistons.

A better comparison would be a water to air intercooler/chargecooler (or radiator/heater matrix). But once again the surface area that the air and fluid is in contact with is massive compared to the throttle body.

Last edited by ALi-B; 23 February 2012 at 12:57 PM.