In my case I think the car I'm the most afraid of, and drawn the most to track, is the one that's so controllable that I can "dance on the limits" all the way around the track, rather than being careful to stay back from that edge. I'll never forget the track day that I first experienced the mental driving state of "unconsciously competent". For those not familiar with the term, that's when you get into "the zone" to the point where your brain is processing all of the sensory inputs on a subconscious level, and where the driver's reactions are made much quicker than when performed at a conscious level.
The car was running its best, and I had got tire pressures dialled in perfectly by mid-day. One particular session started out normally, and I remember the track taking on an unusually smooth rhythm. It felt odd as I passed a couple of cars I had never been able to do before. At the end of the session I felt strange, almost like I had observed the session from the driver's seat as opposed to experiencing it in the normal way. Data-logging showed I had been running 2 seconds per lap faster than I had ever previously. In that session I had moved from the "consciously competent" state to "unconsciously competent". I've only experienced it since a few times, and only in the Supra that I got dialled in so well. If your mind is elsewhere focusing on an odd noise or something, or the car feels off in some way, then you're unlikely to be able to reach your ultimate ability. My MR2 has a tricky rear suspension quirk that you're ever focused on in some corner situations, and that's likely the reason that I've never experienced this in that car.
But if you have experienced this state, it is an addictive feeling that you want to experience again. And the reason it makes you a little afraid is that you know that dropping 2 seconds a lap off your normal best times is huge at once you've reached an advanced skill level, and you were driving closer to the edge than ever before. I recall a Baptist Minister driving a 911 GT3 saying that the faster he drives the closer he feels to God...and I guess in one way I've felt the same a few times now.
As far as the Viper goes, or perhaps all cars with such high limits, I don't know whether it's possible to get so comfortable at the limit that you could get this far into the zone...or whether you'd even want to. I guess it would depend on whether you're willing to accept that level of risk. Thoughts?
Bruce