I'll bet that intake air is whistling so fast through that short, stubby throttle-body there isn't enough time for the residual heat from the TB to transfer via the metal:air interface to make one gnat's dick worth of temperature change that anyone could measure with normal gear available.
One could in fact argue the converse, that while the existing arrangement is a very inefficient radiator serving to keep the engine coolant temperature down, it's more useful purpose is maintaining temperature commonality in an ancillary component, especially in cold conditions and even more-so at start-up, where the object is to get engine temps to normal operation levels as fast as possible for reasons of efficiency and pollution control. Further, given the isolation of the TB from the block, rapid standardizing of temperatures across that isolator will reduce the effects of differential expansion and hence stress on mounting bolts and the mounting interface.
Like the other hoary recommended mod about "TB earth-wires", this looks like a solution looking for a problem and that driver reports of "improved/cooler temperatures" are no more than a mechanical placebo effect.
Last edited by Doug_MPS6; 10-01-2014 at 11:37 AM.
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