the principle of cold air is valid.
I see bags of ice sitting on aluminum intakes between runs at the track.
Cooling the fuel line is an option also. Think about 40 degree fuel being sprayed in a fine mist, Its gonna cool the surrounding air. My thoughts in the past was to divert the purge spray of nitrous through a mini radiator for the fuel. It could be done with c02 cartridges also. All it would take is a small heat exchanger- a small copper pipe wrapped tightly around the fuel line several times. Pump a/c air, nitrous, or co2 through it. Add water and it would last a while. Run the a/c line through a larger pipe full of water. Wrap the copper cooling tube around the pipe. Heck, at that point you could just fill the pipe with ice water and let it do the work. I'm pretty sure Summit sells an ice/water fuel chiller bucket.
2004 Ford Ranger Sonic Blue 4dr 4x4 4.0 Manual