For drag racing purposes, couldn't one place ice in a plastic bag and then place the plastic bag in the bottom of the stock air box in an effort to reduce IATs. It seems like a pretty simple setup that would not require cutting holes here and there. This is obviously not something that will work during normal driving, because of the ice eventually melting. However, on the surface is seems reasonable for short periods (i.e., 1320 ft). Any thoughts and/or comments?

-K

What about dry-ice?

This is an old 1/4 mile trick . Its has been done and does work . dont use dry ice while running though its all nitrogen and as it "melts" it will release the nitrogen which is innert and will cause there to be a lean mixture and a lose of power . Dont try and contain dry ice in a bag either as it returns to a gas it will enevitibly fill the bag till it burst releasing the dry ice and gas anyways. in theory if there was enough nitrogen returning to a gasous state at one time the car will stall out and there could even be trouble codes involved. Plain ice does work and ive seen people use it in the hot weather with good effect.

What about dry-ice?
A couple of things...with dry ice, frozen CO2, being much colder than ice, frozen H2O, might there be a problem getting the intake air too cold (see below)?

Also, when the dry ice sublimates, where does the gaseous CO2 go? Into the intake. I am not entirely sure that I want this. Assume that the intake tube, from filter to throttle body flows a given volume of gas. As we cool down the intake air, we will get the same volume, but because of the higher density we are getting more lb/hr. But if the CO2 gas becomes part of the gas entering the intake, we have effectively reduced the overall quantity of air. I do not know that we would still not benefit from the cooling of the intake air, but a portion of that gain is negated by the gaseous CO2. Then, suppose we are able to significantly cool the intake air, is there a chance that the MAF will be overwhelmed to such a point that it does not know what to do with all of the air. Anyone want to give it a try and report the results? I will have to think about this.

-K

P.S. The dry ice idea is really cool, Frorocks. It seems that it would be much more manageable than frozen water. Ice = 32 F, Dry Ice = -109.3 F....buuuurrrr! Would we need the car tuned for this?