So you have a really sweet car that you spend a ton of money on. Then you have this track car. You go to the track with all your twinturbo buddys who spend far less on their cars just to get passed all the time in your NA. Now, no matter what car you drive you will be getting past all the time until you kind of figure out what you are doing. But, once you get the hang of it and you start getting past by less skilled drivers in TT's (or any other faster car) and you have spent all that money on YOUR TT just to know that its all shiney in your garage is going to suck. At least I think it would suck to get past by cocky newer drivers with less expirence in faster cars while you are currently extracting 0 happiness from your large investment of a happiness generator in the garage at home. If you really want to start with an NA do what KILLR300ZX suggests above. Sell both get a slicktop he is right about the weight. Then drive it all next summer because you dont need the power while just leaning to drive on the track. By next fall you will be "done" with the black car. Freeing up time and money that winter you do a ttswap in your slicktop race car with sport 500's 555 injectors and a stripped interior and weight savings everywhere. THEN, you have the ultimate track car. I know you, you don't do things half way. Trust me on this, its the only way you will be satisfied.