Originally Posted by rwheelz

In terms of track use and fuel consumption: The C7Z consumes twice as much fuel. It struggles to manage its own heat when pushed and the ECU pours on the fuel. Like I said, I don't mind burning a couple hundred bucks on fuel for a track weekend, but the range becomes an issue. Is there a station close enough to the track to refill every two sessions? The C6Z was bad compared to tracking my S2000, but nothing like this newer car. You can almost see the fuel gauge move. 2-3mpg vs 4-6mpg. How much fuel do you want to bring along in jugs?

In terms of track use: It consumes tires and brakes even more quickly as well. It is more than 200 lbs heavier comparing them on my own corner scales. It feels heavier, though manages its weight just fine and is superior in terms of outright grip regardless comparing stock for stock (my C6Z did not have magnetic suspension). It just plain costs more to run. It puts down amazing hero laps, likely faster than the C6Z at most tracks. It falls off quickly in the heat and feels flat. You will need a power steering duct (GM product) to prevent the steering system warning, the secondary radiator (even with the M7, forget about it with the automatic, you WILL hit limp mode if you can drive at all from what I have read on CF) which is also a GM product (standard on newer C7Z), and ideally some higher octane fuel or fuel treatment like torco. OR, be willing to back off and let it cool off for a lap every so often, run shorter sessions, etc. The C6Z will ultimately need some cooling mods as well (radiator upgrade and oil cooler) to last in the heat, but lasts twice as long before heat-saturating to critical levels.

I wish I could point you to my many posts on CF and even a couple on here describing why I prefer the C6Z to the C7Z, but they are spread out. I have talked several people out of making the switch. In hindsight, I would have kept my C6Z, mostly as I prefer the power delivery of the LS7. The fuel mileage also matters (C6Z will average 25mpg traveling 100mph) because of the shorter range. The C6Z is also faster at very high speeds if that is your thing. A heads/cam/bolt-on C6Z puts down nearly 600whp on pump fuel while still being drivable. My C7Z is under warranty and they are very strict about modifications, so I am leaving it alone and racking up as many miles as I can. Toss in that the C7Z is nearly twice the price and you have a winner.

Now that I derailed the thread, how many laps can a tesla turn, and how long does it take to recharge? I am genuinely curious. I thought generally electric motors had limited range when pushed to the max.

Originally Posted by lane_viper

To derail the thread a little further, Did you ever fear the valve guide issue on the LS7? I've known people to sell their C6Z's in fear of it.

That was also one reason I opted for the C5Z. The other was the prices, C5's are really cheap these days, and are a hell of a value.

Originally Posted by Mr.E.G.

Thank you. I'm definitely going to get the C6 Z06.

Originally Posted by Mr.E.G.

Unfortunately, our C5Zs need hearwork as well. Mine had it done by the previous owner, so I avoided the expense.