2013 427 walks all over the road cruising. WTH?
08-21-2017, 07:46 PM
#1
Melting Slicks
Thread Starter
2013 427 walks all over the road cruising. WTH?
I have the Michelin runflats that came with the car. (3000 miles) 335 on the rear 285 on front. 19 and 20, respectively. I'm constantly fighting the front from running in the ruts on the road, it takes its own path. Ya know it's worn on the left and right side where all cars and trucks tires ride on the road. Got to keep both hands on the steering wheel as I never know which way it will
Take off too. My air pressure is 30 in the front 30 in the rear cold, and 34 34 respectively when hot. For maximum wear. For a test, I put in 40 pounds of pressure in all four tires, and the wandering all over the road absolutely stopped! Of course I noticed that my ride is a lot harder. I called Michelin tire directly and ask their recommendation on air pressure, and they said that 30 front 30 rear so I was correct that is a cold setting. My question to you is, is this the way your car handles? Is this just inherent in the way this car is going to handle with these tires? I called to tire distributors, they both said that this Michelin was the only one with run flats for that size of tire. What?? When I had my C-5 Corvette I would round non-run flats and carried a kit in case of a flat. I'm not sure if a non-runflat tire is available in the sizes that I need for my car?? What the heck, there has to be other options !! Michelin says, there must be something wrong with your tires. What say you. Thanks guys. ZR1 wheels 20" rear and 19" front
Take off too. My air pressure is 30 in the front 30 in the rear cold, and 34 34 respectively when hot. For maximum wear. For a test, I put in 40 pounds of pressure in all four tires, and the wandering all over the road absolutely stopped! Of course I noticed that my ride is a lot harder. I called Michelin tire directly and ask their recommendation on air pressure, and they said that 30 front 30 rear so I was correct that is a cold setting. My question to you is, is this the way your car handles? Is this just inherent in the way this car is going to handle with these tires? I called to tire distributors, they both said that this Michelin was the only one with run flats for that size of tire. What?? When I had my C-5 Corvette I would round non-run flats and carried a kit in case of a flat. I'm not sure if a non-runflat tire is available in the sizes that I need for my car?? What the heck, there has to be other options !! Michelin says, there must be something wrong with your tires. What say you. Thanks guys. ZR1 wheels 20" rear and 19" front
Last edited by hotrod03; 08-21-2017 at 10:38 PM.
08-21-2017, 07:57 PM
#4
Drifting
Your alignment may be too aggressive causing it to tramline in ruts on the road. Run flats are also harder and just ride like crap to me. Definitely go with non run flats and maybe less camber.
Last edited by Patriot Six; 08-21-2017 at 07:57 PM.
08-21-2017, 08:08 PM
#5
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You don't seem like a kid who knows nothing from your background (i.e., retired), therefore I'm really wondering why you wouldn't know about alignments. Not trying to be negative but if you read anything on C6 Gen page 1, month after month there are threads on alignment, wandering on the road, etc.
And frankly, it has nothing to do with runflats or non; it has everything to do with new tires not being contoured to a poor alignment and the car needing a new one. Yes, runflats will run a little harder, but it's a price to be paid for not having to sit by the side of the (busy highway) sinking into a soft shoulder which isn't paved, trying to add Slime, or pump up the tire so it doesn't ruin your wheel, wheelwell, fender potentially, etc.
Look here on C6 from an advanced search for "Pfadt alignment" and take those in to whatever alignment shop you trust. Those specs, or even your asking for a "street alignment" spec will be more beneficial to handling and tire wear vs. the "wide" range given by GM. Don't forget to ask for a little "extra" torqueing of the rear nuts so that they don't loosen up.
Good luck.
And frankly, it has nothing to do with runflats or non; it has everything to do with new tires not being contoured to a poor alignment and the car needing a new one. Yes, runflats will run a little harder, but it's a price to be paid for not having to sit by the side of the (busy highway) sinking into a soft shoulder which isn't paved, trying to add Slime, or pump up the tire so it doesn't ruin your wheel, wheelwell, fender potentially, etc.
Look here on C6 from an advanced search for "Pfadt alignment" and take those in to whatever alignment shop you trust. Those specs, or even your asking for a "street alignment" spec will be more beneficial to handling and tire wear vs. the "wide" range given by GM. Don't forget to ask for a little "extra" torqueing of the rear nuts so that they don't loosen up.
Good luck.
and attached are the alignment specs. you will need.................
Last edited by rkj427; 12-01-2018 at 11:18 PM.
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hotrod03 (08-21-2017)
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08-21-2017, 08:23 PM
#7
I had mine aligned last year before a long trip with the Pfadt specs. I was mostly looking to even out the tire wear by moderating the camber, but I can say my 427 does handle better on the highway with less chasing the ruts. With that said, you must still be on your toes on highways with truck ruts. Tires this wide don't fit the ruts well, and you will find yourself having to stay in command. So far the alighnment has helped my tire wear. I am sure I will now get 35000 or more out of my original tires. Our 427 is strictly a road car, with almost local driving.
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08-21-2017, 08:25 PM
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AORoads is spot on! Your "new" 427 needs an alignment, not new tires. PM me and I will give you the alignment settings I recently had done on our Grand Sport - it now drives better than it ever has.
08-21-2017, 09:13 PM
#11
Melting Slicks
Thread Starter
You don't seem like a kid who knows nothing from your background (i.e., retired), therefore I'm really wondering why you wouldn't know about alignments. Not trying to be negative but if you read anything on C6 Gen page 1, month after month there are threads on alignment, wandering on the road, etc.
And frankly, it has nothing to do with runflats or non; it has everything to do with new tires not being contoured to a poor alignment and the car needing a new one. Yes, runflats will run a little harder, but it's a price to be paid for not having to sit by the side of the (busy highway) sinking into a soft shoulder which isn't paved, trying to add Slime, or pump up the tire so it doesn't ruin your wheel, wheelwell, fender potentially, etc.
Look here on C6 from an advanced search for "Pfadt alignment" and take those in to whatever alignment shop you trust. Those specs, or even your asking for a "street alignment" spec will be more beneficial to handling and tire wear vs. the "wide" range given by GM. Don't forget to ask for a little "extra" torqueing of the rear nuts so that they don't loosen up.
Good luck.
And frankly, it has nothing to do with runflats or non; it has everything to do with new tires not being contoured to a poor alignment and the car needing a new one. Yes, runflats will run a little harder, but it's a price to be paid for not having to sit by the side of the (busy highway) sinking into a soft shoulder which isn't paved, trying to add Slime, or pump up the tire so it doesn't ruin your wheel, wheelwell, fender potentially, etc.
Look here on C6 from an advanced search for "Pfadt alignment" and take those in to whatever alignment shop you trust. Those specs, or even your asking for a "street alignment" spec will be more beneficial to handling and tire wear vs. the "wide" range given by GM. Don't forget to ask for a little "extra" torqueing of the rear nuts so that they don't loosen up.
Good luck.
Last edited by hotrod03; 08-21-2017 at 09:17 PM.
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hotrod03 (08-21-2017)
08-21-2017, 10:00 PM
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Didn't read all posts but, Mine did the "Tramlining" act even after getting it aligned, would wander one way then the other, that was with the Nitto Invos (not blaming them in any way) that were about 50% gone.
I got my new Hankooks and along with a new alignment and now straight as an arrow, just FYI, I don't know why but that's the story I got
I got my new Hankooks and along with a new alignment and now straight as an arrow, just FYI, I don't know why but that's the story I got
Last edited by Not So Fast; 08-21-2017 at 10:01 PM.
08-21-2017, 10:07 PM
#16
Melting Slicks
Thread Starter
Didn't read all posts but, Mine did the "Tramlining" act even after getting it aligned, would wander one way then the other, that was with the Nitto Invos (not blaming them in any way) that were about 50% gone.
I got my new Hankooks and along with a new alignment and now straight as an arrow, just FYI, I don't know why but that's the story I got
I got my new Hankooks and along with a new alignment and now straight as an arrow, just FYI, I don't know why but that's the story I got
So much!!
Last edited by hotrod03; 08-21-2017 at 10:09 PM.
08-21-2017, 10:08 PM
#17
I had the same problem with the original good year run flats then I switch to firehawks runflats and no more problem.
08-21-2017, 10:12 PM
#18
Melting Slicks
Thread Starter
Last edited by hotrod03; 08-21-2017 at 10:13 PM.
08-21-2017, 10:12 PM
#19
Tech Contributor
When I had Michelin PS2 tires, my car drove similar to yours. When I bought new wheels I switched to Nitto Invo non-run flats. The car stopped trying to follow the ruts.
I think that the Michelin run flats have such a hard and stiff sidewall that it tries to go the way of least resistance (ruts). The non-run flats seem to flex enough to go where you point it.
I think that the Michelin run flats have such a hard and stiff sidewall that it tries to go the way of least resistance (ruts). The non-run flats seem to flex enough to go where you point it.
08-21-2017, 10:19 PM
#20
Melting Slicks
Thread Starter
When I had Michelin PS2 tires, my car drove similar to yours. When I bought new wheels I switched to Nitto Invo non-run flats. The car stopped trying to follow the ruts.
I think that the Michelin run flats have such a hard and stiff sidewall that it tries to go the way of least resistance (ruts). The non-run flats seem to flex enough to go where you point it.
I think that the Michelin run flats have such a hard and stiff sidewall that it tries to go the way of least resistance (ruts). The non-run flats seem to flex enough to go where you point it.
Rear335/25 ZR20
FRT. 285/30 ZR 19
Last edited by hotrod03; 08-21-2017 at 10:21 PM.