Real world TPI hp gains

[Johnny]

Mark Reichert wrote:
> 
> >     I think it may be used to keep the throttle body at a constant
> >     temperature to avoid minor power fluctuations caused by inlet
> >     temperature changes.  I may be wrong, but I think it sounds like a
> >     reasonable explanation ?
> 
> One more data point. I had been told that it was to keep the
> throttle from icing in severe cold conditions.
> 

You are right on  the mark. The conditions have to be just right but it 
can happen. Of course with a valve to control the heating water that 
isn't a problem as you can just heat it when you need to.

-j-