Most guys won’t be able to run their cars to its limit on a track in general. Especially if you’re talking about most 240 owners. Most people are just very insecure about their cars and think that they need something better, and more power, etc in order to drive on the track.
What they don’t realise is that a lot of it has to do with the driver. If your rear tires keep getting loose on you entering a corner, it doesn’t mean that your tires are shit. It could mean that you’re not shifting properly and maybe turning the steering wheel too sharply, etc
My car can probably go a lot faster if it had a better driver, but because I suck at driving, I have to compensate for that by getting better tires, (RT 615s), more power, etc
Oh and of course most people are scared to break their cars on the track.