Cathar said:Not really to do with restriction. Less restriction is always desirable.
There would be a different reason why they're using the A-C rad. The A-C rad internally may be better designed to suit lower-flow rates and not lose efficiency as quickly as something like a Black Ice will. I don't really know though - I've never seen good testing for an A-C rad.
So do you know of some place that we can get the A-C radiators tested? I'm pretty sure Sharka would be willing to send an Airplex Evo radiator with the XT block if ProCooling would be able to analyze that at the same time.