This Corvette has more capabilities than I am aware of, since I just acquired it for Death Valley. I use wheel - and almost always automatic transmission.
Okay, since I have nearly zero experience with a wheel in Gran Turismo, I don't know how much I'll be able to tweak this for you. Here's a few things I usually tell people when converting controller --> wheel tune:
From what I've done recently, it seems that most of my cars had their Torque Sensitivities too low, I'm gonna guess the same with this tune. Also, now that I'm looking at it, the Ride Height split is another likely contributor to the headaches with tire wear. I putting that at 75/75, and increase the front spring by one full point (if possible). Also, as I said earlier, the very high 9/8 brake balance will wear out tires very quickly, especially on very fast tire wear, which is what I assume you run under. I'd try something along the lines of 6/5 or even 5/4. It'll be slower, but you'll save the front tires a bunch, especially if you have a tendency to brake heavy and late like I do.
Also, my tuning here might have it sound confusing, but for whatever reason, I have all the available upgrades for the car listed. To my knowledge, I have none of them equipped for this power, and usually don't do events that require these parts being equipped. The removal of the Engine/Supercharger will decrease torque and put less stress on the wheels and therefore reduce tire wear.
Since you use a wheel, this car likely slides around all over the place for you, even more so with how loose I tune my cars (as described by my associate Carnby, driving one of my tunes is like handling an elephant on ice). Some ways to tighten the car up include, but not limited to:
Increasing Rear Downforce (if applicable)
Increasing Front Spring Rate
Equalizing Ride Height and Dampers
Swapping the toe angles I have listed (put the front on rear and rear on front)
Increasing Initial Torque
Lengthening the Final Drive Ratio
Adding Front Brake Balance (if the car is loose on brake).
I hope this bit is able to help you. I won't be able to access GT6 for a definite fix until at least January 3rd. Maybe later.
