flynfrog wrote:water methanol injection is used on NA cars to cool down the intake charge. I cant rember what car it was I belive a for prototype mustang used the AC compressor to chill the water before injection. They might have also used this on a Euro spec focus. Its all a little hazy right now.
Interesting idea but I think you will find that the water/methanol injection simply adds an oxygen dense source, water and a dense hydro carbon based fuel methanol, into the cylinder without upsetting the ordinary fuel air mixture much in the same way as Nitrous plus extra petrol.
Cooling the air going into an IC engine will use a huge amount of energy, because there is a very large and continually changing volume of air (mainly Nitrogen) to cool.
Air intake design only becomes really critical if the air sourced is at transonic speeds (as in some aircraft).
There is of course an induction 'pulse' advantage to be had from tuned length intake trumpets. These can be moved to increase or decrease the length to balance the intake pulse characteristics of different camshaft designs at different rpm. This is similar to tuning exhaust headers.
) to cool it to even lower temperatures. I'm not quite sure about the intention of the quoted rule. You could use an additional fuel nozzle to cool the air right at the entry of the the airbox, but as there are no restrictions in diameter (that I know from) I can't see the purpose of this.
