Sorry I had to go to NC the other day to ferry a Helo back there and the weather was crap in OH. and WV. on the way down , I did not get home till 11pm and the wife was not to interested i n me hopping on the computer ......back on subject as for air to water not being good on the street , that is false I can deffently say that without a batting an eye , but a heat exchager is mandatory , I have seen the LoveFab NSX , weather on the street or the track the car has performed flawlesly , but it has a rather large heat exchanger for the water to flow through , you have to remember that air VS. water that water has better heat transfer capabilitys but it can also be said that once heat soaked ( all intercoolers get heat soaked ) say you are sitting in traffic for a long time ect. it will take longer to cool all the water again so it is would not hurt to run a fan on the heat exchanger as well but somthing to consider also is that with A2W you can get the intake charge bellow what a A2A could ever do by adding ice to the resivore ....I like it because it can be stealth looking from out side the car , a heat exchanger done right fits easy here is mine .....
then you should get a quality pump Jabsco , Flowjet , Dayton ect. the factory bosche ones tend to die quicker , but it will work if you are on a budget ....there are many SR20 guy that have used it with great results , Coach is one that comes to mind ...I will try to find some of there threads when I get a chance