BrandAidDesignG35 wrote:I noted exceptional handling with my 245/35/20, far superior to the stock 17" wheels with all season "sports" tires... (which I traded for 18" 350z wheels...)
moral of the story is I'm now looking for lightweight 17" wheels and low pros hoping for better times at the track next year
So, I think you made the right choice
Track and twisty roads and drag racing are entirely different and will require different tire sizes. The G-35 and 350z are not natural drag cars and so it is conceivable that smaller tire sizes like 17" would help in their drag times.
However, if you plan to run the G-35 or 350Z on a real twisty track, while laying down the horspower, you will need without question, at least 18" wheels or higher. I cannot stress this enough, especially when you have to suddenly brake in those turns---smaller tires can lead to oversteering and possibly fishtailing at high speeds in those twisties and loss of control, depending on the suspension setup.
I take my little nissan and my G-35 to my secret track and i can tell you that my little nissan with 13" wheels is insufficient and requires bigger tires and stiffer suspensions to handle any additional power in order to make it out of and into any twisty turns---with smaller tires you can also experience understeer where your car just starts going in one direction no matter the input to get it back on track---very scary when it happened to me.
My G flies through those turns with so much ease especially with the Toyo proxes T1R tiress I have. G-35 and 350Z are natural animals for the twisties and unfortunately, very few people will ever get to experience the joy of driving a G-35 through twisties at impressive speeds.
Driving in twisties is a completely different ball game than dragging your car. Power is the least of your headaches in twisties. Handling is king and everything. Your suspension and tire set up can make the difference in performance and staying alive. What you want in a twisty is a car that can handle the power being laid down without fishtailing and loosing control.
Trust me, it takes many weeks of practice to get to a limit of being comfortable with the car sliding gently away as you lay down the power at the corners. It can be a scary experience at first. Too much torque or being in the wrong gear in a specific turn, which delivers different torque levels, could end your life pretty quickly in twisty tracks. It gets pretty busy and involved under those conditions. And good brakes that do not fade is almost a must.
I learnt a lot driving my G-35 on my secret twisty track.