You can turbo these. A centrifugal supercharger could work but space is hard to find and any that would fit are very expensive. (Super chargers in general are way over priced.) I have known some people to turbo Aerios but mainly running the 2.3L. The job requires a custom manifold, custom exhaust, and upgraded fuel system. You can run around 8 psi with few changes. If you want more you are going to have to pay more. A lot more. Because after that you get into the realm of forged internals, haltech ecu, etc. And the parts are not easy to get. Some even need to be made to order. None the less I am in the process of doing so on my second Aerio. You can actually get some forged parts made for other cars/engines that can be machined to fit. Though I can't remember which cars atm. The biggest worry with adding a lot of power though is eventually going to be the drivetrain.What can be done to get more power from the 2.0l l4 2003 Aerio. Preferably on the cheaper side of things. Also has anyone turbocharged or suppercharged on of these. If so what did you do.
There was a reason for the comment Phil - to emphasize the point that no quantitative measurements had been done - no dyno tests, no x seconds less 0~60 times. Sure it "felt" faster, but, that was more than likely just wishful thinking...But, It sure feels good...!