HEY HEY HEY!!!
We are NOT including just ANY 4-cylinder machines. No need to defend your position on the 240SX--I know from first hand what a free flowing KA24DE can muster. One buddy with an S14 ran, and got a few initial car-lengths on a (what seemed to be) stock E36 M3. 2.4 liters is massive, especially for a 4-cyl. Thats just 200ccs away from the displacement of the Skyline GT-R. And what have we all learned from this? There really is NO replacement for displacement. VTEC (and other variable cam systems), turbines/blowers, nitrous oxide? They provide merely support for a motor. Perhaps they can expose high numbers on paper, but NOTHING feels like a high-displacement powerplant, especially the oversized ones, such as those of the 240SX models.
If you haven't noticed yet, we are just expelling Honda 4 bangers from this thread. They have no place here. They do not provide the entertainment Z cars can conjure. Honda S2000 you say? It's a wonderful car, but ONLY for the purpose for which it was built. It STILL doesn't belong here. Just understand that we are not making "uneducated assumptions".