I know for the money there are so many better things to spend it on but excluding that, looking only at their effect on things such as pressure drop, temp drop of charged air, changes to egts, are there or are there not positive effects between running a stock IC versus Hypermax, Spearco, Banks, Hellman etc..
If you are running heavy NOS I would think its cooling effects would mitigate some of the performance a IC provided compared to fuel only but I certianly could be wrong on that as well.
Its hard to believe the performance of a 13 year old intercooler designed for 200HP worth of air flow could not and would not have been improved upon. Understand I am not saying one way or another it is or not you woudl just think like most everything else dealing with these motors there woudl be significant room for improvement.
I was looking back but could not find just yet the threads back over on TDS, before PSN etc.., where a few got together to run tests on the big 3 or 4 back then off one engine. Think it was back in 2006. Anyone recall those?