Re: Nitrous' intercooling effect.
I think nitrous has a much worse rap than it deserves. If used "properly" it can be a safe and inexpensive way to increase your horsepower. Key words being "properly." Nitrous will give you a little cooling effect until it is burned. If it burns with the correct mixtures it should be okay, but if you run lean you will soon have a problem on your hands. Your motor will heat up very fast and you can kiss it bye-bye. If you run rich, like many drag cars running nitrous, you will be safer, but your cat is gonna eat it after a while.
Adrenalin is coming out(may be out actually, haven't checked) with a 75-shot combined with a 1-bar chip. It is a wet kit and they had to totally map out the fuel because of the way our ECU's boost. So it is specific to the 1.8T. Just some FYI if your seriously thinking of going with nitrous.
Good luck.