I was speaking to someone about running cool air to my cone filter and he was saying that you can get a thing that squirts a mist of meths / water onto the induction cone which cools the air but also conserves your engine by preventing carbon deposits and preventing pre-combustion, although i dont know that i would have pre combustion in a non-turbo car. Ive found a company called aquamist that have a thing that squirts water into the pipe between filter and air intake, no mention of meths though.