You can either up the caster on the R/H side, or lower it on the left
Or some combination of the 2.
Aim for about 1/2* spread?
"Pulls to the side with the least positive caster."
Also possible to accomplish it with camber split.
You can lower the minus value on the left, and increase it on the right, but I prefer doing it with the caster...

 

Okay so I currently am at 7.60° caster on both sides so I could go to about 7.0° or 7.1° on the left side and that should help?

 

Really wish one of you guys were within driving distance from me. I’m desperate to get this figured out and driving straight. I’ve tried about everything I know to try but no luck, the damn car just won’t drive straight. I need someone else who drives a C6 to drive mine and tell me how big of a difference there is, but 95% of the time while driving I am countersteering to keep the car going straight

 

I don't think it is you and I don't think it's not the car. Most roads, highways, interstates, city streets have slope to them for rain drainage. Some have a lot of slope; some very little slope to where it looks flat. And I don't think it takes much slope at all to induce a pull.

I experience the same thing. I feel like the car wants to pull to one side most of the time and think that the alignment is out. Then I drive on a different road and it feels like it is pulling hard in the opposite direction.

On the interstates here in the north Kentucky, Cincinnati, Oh area, most of the interstates are 3 and 4 lanes. The 2 or 3 lanes closest to the center always make the car pull to the left toward the center. The outer lane usually is sloped to the outside and has the opposite pull. But this isn't always consistent. I find on some roads the opposite is true and I think it has more to do with the road texture.

And it is nearly impossible to find a road that is perfectly flat.

I have a 2013 BMW X5 that I purchased used a few months ago and it does the same thing. Even had an alignment done at a good BMW dealership and it pulls. I think it had to do with the all wheel drive system and it's wide wheels it has.

Is there maybe a drag strip near where you are that you could just drive normally on to see? Maybe on a test and tune night? That should be a very flat surface I would think and be long enough to get up to speed to see if it would still pull.

And to add:

Have you checked your tread dept or tried a new set of tires? It's the only other thing I can think of as it looks like you have tried everything else.

 

I definitely understand that a pitch to the road can dramatically cause a car to pull to that side. However, the thing is my car pulls to the right like 95% of the time I’m driving regardless of the side of the road I’m on. And usually when a road has only has a slight slope (looks flat but isn’t) the pull will be slight and gradual, but even on what appears to be a flat straight road when I release the steering wheel immediately takes off to the right.
I know with wide aggressive tires on a light car it will cause a car to pull, sometimes dramatically, to one side or the other but this is different. Wish I could explain it better and I know there’s not much anyone can really help me with over the internet but I’m just venting more than anything.
I just remember what the car used to drive like back before anyone had their hands on the cradle, steering rack, steering shaft etc and it definately did not have the always want to go right feel to it. :/
The only time I can release the wheel and not go right is when I’m on a road that has a very severe
pitch to the left.

 

Put a thread in the regional forum where you live and someone may respond.

You might also look for a "Cars & Coffee" meet up or an Auto-X and talk to some C6 owners there. Lastly, check to see what Corvette Clubs are in your area and reach out to them.

 

Could you have your alignment shop re-do the alignment with you sitting in the car? Just re-read this thread and it's the only thing I can think of as it seems you have tried everything else.

Maybe your weight is throwing the alignment off when you sit in the car? Are you a "big boned" fella?

 

lol Not really, I’m about 200lbs. I could definitely ask them if that’s something they would do.
I don’t think it should make a difference but the alignment tech did say he could see that the front cradle was very slightly off from the factory location…. Maybe I need to have them reset it?!
Other things I was thinking of is maybe there’s an issue with that passenger shock or possibly the ride height is slightly lower on the passenger side… I would think they could see that on the alignment machine though

 

I would do both. Get the ride height the same and the cradle back to as close as it was before. And alignment with you in the car.

In regards to the shock, you could also swap that to the opposite side of the car. See if the pull changes.

 

Yeah I think I will do that. Moving the cradle is just a matter of loosening the 4 mounting bolts right?
The reason I thought maybe the issue is the shock is because I drove it for a pretty long time with that one lower mounting bolt missing and the shock was twisted and out of place slightly so I’m sure that was putting excessive pressure on it. It doesn’t make any noises but maybe it screwed it up somehow. I guess that could affect the ride height also if it did.

 

Yes, just loosen the four bolts. You will likely need a good pry bar to move it. You won't be able to move it much as there are locating pins in the frame. Just try to line up the bolts with the original witness marks if you can.

And definitely swap the shocks. If that one was damaged and it could definitely be, it could be causing the pull. Honestly, if you are going to take the time to swap the shocks side to side, you might as well just replace them actually.

 

Yeah I was going to say if I’m going to do that I’ll probably just get 4 new shocks. I’d like to go with Bilsteins but I’ve seen several good deals on some C6 Z06 shocks. Not sure how well they would match up with my factory base spring but I’m sure they would be better than stock.
The alignment tech at Firestone told me he would realign the cradle for me if I brought it back so I guess that’s what I’ll try next. I know that when my cam and balancer was done they dropped the cradle, so that’s why it’s slightly off.

 

Can't go wrong with either the Z06 shocks or the Bilsteins. And they will work great with the factory spring.

I had put a set of C6 Z06 shocks on my C5 and it made the car handle much better without making the ride any harsher.

I put a set of Bilsteins on my C6 GS and it made the handling much better with the same ride quality.

 

same here actually I put both Bilstein B8and C6Z shocks on my C5Z and I liked both but actually preferred the Z06 shocks a little more because the Bilsteins I think we’re a bit stiff.

 

I'd go with the Z06 shocks for your car.

 

So I drove a friends 08 C6 base with all stock suspension this evening and he drove mine as well. Big difference!! His drives straight just like mine used to, and much different than mine does now. When he drove mine he said the first thing he noticed was how there is more steering effort when turning the wheel to the left vs turning it to the right, which is exactly what I’ve been saying. And he said the car is definitely pulling to the right, it just wants to go right no matter what. It’s as if you are always driving on a road that is sloped to the right. The aggravating thing is that it is most definitely not in the alignment. I wonder if somehow the ride height is lower on the passenger side, Not sure how that would have happened though. That’s kind of the best way to describe it is like I’m driving around with the right side of the car sitting lower than the left side. It Doesn’t actually feel that way sitting in the car, only referring to the steering feel. I just don’t know what the shop could have messed up when they worked on it unless maybe they jacked the steering rack up.

 

Something else I thought of. If I drove the car for awhile with the car pulling right and then after the alignments it’s still pulling right maybe it’s because the tires wore too much unevenly….. so even tho the alignment is good it’s still pulling because of the tires?! I did swap sides on the tires but that was before the last alignment I got where the tech told me it was dead on.
I’m just trying to rule out everything I can before I buy a new steering rack and spend big money on it.

 

Can you swap the friend's tires onto your car? That would eliminate the tires being the issue.

 

He might be up for that. I think I’ll try swapping sides with my tires first and see if it changes at all. I have a feeling it won’t but who knows

 

Just wanted to follow up on this post. I took my car to a performance shop and had the owner as well as another employee drive my car and both agree that my issue is probably not the steering rack and are confident it’s my tires. That would make sense because this started right after getting the new tires, but how could four new tires cause the car to pull significantly to the right of the alignment was good? Also I swapped sides with the tires and it did not change so how could it be tires? Maybe I just got a bad batch of tires?! I do know rhwt very soon after having the tires put on I found wires poking out the sidewall of the passenger rear tire and had to have it replaced.
So now I’m looking at buying a set of these. In larger than stock sizes