Cold air intake?

I have that 5" cowl and a 14x6 AEM filter on the carb. If you think that's drawing enough air to suffice then I can leave it alone. This is why wanted to ask if there has been experiences with running intake tubes to outside air sources to see of it's worth time and money. I run an electric pump and fan already, that's a must for serious bracket racing when the car may only have a few minutes to cool between runs. I am also planning the switch to e85 as soon as I get fuel, so the car should run very cool afterwards.