Vago, I did some WAI testing this week with the RAM. Honestly, I was a little surprised to see the FE improvement.
http://ecomodder.com/forum/showthrea...tml#post343575 I like the heater core idea in the airbox; I would not have thought of that. I ran a dryer hose from the radiator to the airbox. Not as much heat rise as you got, but I did get 20*F. I later this week modified that to pull air directly from where the upper radiator hose connects to the radiator, and got nearly a 30*F rise over ambient. Pix attached. Not real pretty, but if it didn't work I didn't want to kick myself for a difficult removal...