devnull

Folks,

I have had this awesome 2013 60th GS for about a month (little under 1,000 miles). When I bought it the tires weren't terrible (my eyeball calls it 5/32nds). Car has been squirrelly over manhole covers, etc and amazingly awful in the rain (not my first rodeo with a vette, I've been DDing these for 15 years). I knew it was an alignment issue, but didn't think it was THIS BAD HAHA!

I am impressed (alignment scheduled for Tuesday). I'll probably go PHADT street setup on it, with some nitto invos (have a set in the shop).

It's like they have 3 degrees of POSITIVE camber (both sides too)

DAAAAAAAANG!

J3TVETTE

Glad you caught that in time! What tires are next?

devnull

Thanks man, yeah wow! I have a set of Nitto Invos that I'll chuck on for awhile and see how it goes. Once I ha e it running properly, I'll look for a longer term set haha.

J3TVETTE

Ah very nice, should be good for traction for sure. I do a lot of highway driving so miles rack up, I did the Wide Oval RFT and they seem to last. Let me know if you are able to do a 1st gear pull without breaking traction once you get those on.

devnull

Will do man. I've used these on the C5Z's before, but never with ones this wide. Can't wait to let this thing fly with wheels pointed straight and decent tires!

Red Devil Z51

good thing to catch before it blew out at speed.

devnull

Yeah man it came fast! Under 1,000 miles since I bought it!

CSixDude

The factory alignment specs cause C6 tires to wear like that. If you simply have it set to factory alignment, you'll still have the problem.

Somewhere on this site, there is a link to alignment specs to use that will make your front tires wear more evenly.

CSixDude

I found the link. Check this site out. Print it out and take it to a good alignment shop that can set them to the spec, and not one that just uses a machine set to the factory spec. Find an old school alignment guy that knows what he is doing.

http://www.pfadtracing.com/docs/camb...t-settings.pdf

madmatt9471

Yeah, that's bad -

Hopefully if there is anything causing the alignment issue they'll find it ( ex. busted spring adjuster, bad bushing, etc.)

Any idea yet as to what the issue was? previous owner do something? Busted part?

Thanks,Matt

devnull

Thanks bud, yeah this is exactly what I was going to use for this. It was factory aligned by the previous owner not long ago. THANKS!

I'm hoping that the pre alignment setting show this too...

Yeah I'll be doing the alignment with them (they know me well and I've taken all my cars there since I like their setup).

I'll check everything, I was thinking bushing too, but will be looking hard. On my lift, I see nothing unusual nor do I feel any play anywhere. Odd!

I guess that factory spec is just THAT off? Wow

THANKS!

I'll report back the pre setting (and post). Should be interesting!

devnull

Step 1 complete haha

johnodrake

With that much positive camber it must have been hard to turn!

919cw313

For it to go from 5/32nds to belts in under 1000 miles the car should have been undrivable.

devnull

It was rears, and quite squirrly!

i would say close to yes.. in the dry it wasn't too bad, but rain was a total different beast lol

Gearhead Jim

The factory alignment numbers aren't bad at all, except for the tolerances given. If you set everything exactly to the Service Manual numbers, you'll be ok. But if the alignment guy is satisfied with numbers that are at opposite ends of the tolerances, the car will be just awful.

The pfadt street specs are within the tolerances given by GM, you're just asking the alignment guy to do a good job of getting everything equal on both sides.

EDIT:
We've had three new Corvettes, every one of them had at least one setting that was way out of tolerance by the time we'd accumulated a thousand miles. I don't know if the cars came out of the factory that bad, or the adjustments shifted as the suspension settled, or the adjustments weren't tightened enough at the factory.

RobLo

I just had an alignment done from a very well respected shop here on Long Island, they are known to do a very good job on Vettes. I asked about the Phadt specs and they told me they only do them if the customer specifically wants them, they said the GM specs were usually used and that they were recommended for average street use, no tracking of the car. I followed their recommendation and went with the GM spec. After the alignment they gave me a before and after sheet, the after sheet was pretty close to the performance street specs on the phadt sheet...I don't have the before and after with me but if you or anyone wants I can get them and I'll post both specs later or tomorrow morning.

devnull

Thanks guys... good news is that I know the guy who's going to do the alignment well (me haha). I just am renting the machine. It will be exact.

I'm actually mostly eager to see what it's at now. I imagine that the current rear settings have some mix of positive camber and too much toe, but we shall see. I am not going to know what I set it to until I see the current state. Whatever it is it will be gaining negative camber and most likely losing a 16th or so of toe.

Sky High

And where do you get this info from? I know many members with Grand Sports who use the factory specs, myself included with no issues what so ever. If you have a tech that knows what he doing and gets the GM specs to dead center the car will drive perfect and tire wear will not be a issue. Stop spreading these stories because your wheel alignment guy can't do a proper alignment.

Grand Sport Jim

In my first 2,000 miles to factory specs I had uneven wear. After using the PFADT street setting the wear was even and the car tracked much better. The factory settings were off slightly......
Since then I use the PFADT settings exclusively.