There, though, the parts and specifications used are usually fairly coherent. Where they're not, it's usually because certain upgrades are banned, not because they would give the car too much torque or too wide a powerband.
Plus, it just annoys me how narrow GT5 online play seems to be. From what I've seen of PP specials (and in forum conversations), you'd think the only PP levels that existed were 500 and 550, with 400 and 600(R) showing up occasionally, anything higher getting you branded a noob somehow. 500 is populated mostly by carefully minmaxed M3s and NSXs, and I'm sure the others have similar problems. Meanwhile, seasonal TT players only acknowledge the existence of the Nissan R390 and Chapparall 2J unless there's some strange regulation that prevents using either one, thus showing the other problem with the power limiter. Seriously, what's the point of having 1000 cars if you only ever use a select few?
If I ever host rooms, I should look into ways to block (or reduce the effectiveness of) minmaxed cars and make people look for more interesting choices.