Thoughts on the C6 Corvette Grandsport at the track

[brainhulk]

https://youtu.be/bVzHcWhPPu0

2nd time on track with the car. Only mods are an aftermarket transmission cooler and oil cooler. Coming from a s2000, the vette is much less twitchy. It maybe due in part to the tires, but the handling felt very predictable. The s2000, you really had to be fast with your hands to countersteer. I only had surprise tail happiness when I went too aggressive with the trail braking. Otherwise I would say this car understeers! The tires are 5 year old Goodyear f1 run flats, so maybe It will be a different story when I get different tires. The car takes a split second longer to settle and does not react as fast as the s2000. But man there is much more power on tap. Very different cars, I wish I could have kept both.

Next up when I am done experimenting are new tires and alignment to get more camber up front. I really want to dial out the understeer, maybe even wider tires up front...idk

 

[boomerang]

Why not more camber front and rear? They're both adjustable. Get those run flats off first. Got a friend who can do tire temps? That's going to be the best way to dial in the camber as well as tire pressures. But only if you want to get serious.

If you still have understeer at that point I would correct it with a sway bar change. But does it understeer on entry or exit? That should point you towards whether you want to change the front or the rear bar.

 

[brainhulk]

Why not more camber front and rear? They're both adjustable. Get those run flats off first. Got a friend who can do tire temps? That's going to be the best way to dial in the camber as well as tire pressures. But only if you want to get serious.

If you still have understeer at that point I would correct it with a sway bar change. But does it understeer on entry or exit? That should point you towards whether you want to change the front or the rear bar.

My thinking is I wanna get the understeer under control first. If I add more camber in the rear at the same time, wouldn't that kind of bring the balance back towards understeer?

Another thought I had was that I was just going in too hot on crappy tires. When I was driving around in the canyons, the car felt great. I only saw the ugly head of understeer at the speeds of the racetrack.

The understeer was on entry, once I get on throttle after apex, the car can be steered nicely with the throttle.

Maybe I can try those temperature strips on the tires next time, but not really that hardcore. I'm just trying to have fun.

 

[boomerang]

I suggested putting more camber in both front and rear because that's where you're going to end up in the natural progression of things. You correct your understeer up front and then you'll want more bite and you'll start tweaking the rear. I think putting more tire in the front is a mistake and regardless of what I said earlier, that new tires should be your starting point that may very well become your end point. You can end up with the handling you desire with minor changes if tires don't give you what you want.

It comes off the assembly line set up to understeer because obviously, that tells the average everyday driver when to back off and when they get out of the throttle the car will come back under control.

I envy the fun you're having - truly. I crewed on what became a three car Corvette racing team for about a decade and I can say with authority that being behind the wheel appears to be tons more fun than the wrenching part.

 

[agent00f]

https://youtu.be/bVzHcWhPPu0

2nd time on track with the car. Only mods are an aftermarket transmission cooler and oil cooler. Coming from a s2000, the vette is much less twitchy. It maybe due in part to the tires, but the handling felt very predictable. The s2000, you really had to be fast with your hands to countersteer. I only had surprise tail happiness when I went too aggressive with the trail braking. Otherwise I would say this car understeers! The tires are 5 year old Goodyear f1 run flats, so maybe It will be a different story when I get different tires. The car takes a split second longer to settle and does not react as fast as the s2000. But man there is much more power on tap. Very different cars, I wish I could have kept both.

Next up when I am done experimenting are new tires and alignment to get more camber up front. I really want to dial out the understeer, maybe even wider tires up front...idk

You seem to be "understeering" in some corners because you're not loading enough weight onto the front. In general it would help to balance the car more instead of just relying it to better point exactly where you steer like a smaller/lighter car might.