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I suppose the increase in shear volume beats out the heat of it.
This really is no diferent than just getting a K7N cone or similar - just a whole lot cheaper.
Colder air is denser then hot air making the burn hotter. That is why in racing cool days are when most records are set. So more volume of hot air is not better then cool air. Cones sitting inside a hot engine compartment may help a bit but they help a whole lot more when they are enclosed and feed by an outside air source.

David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA

"Serenity through Sobriety"