2013 427 walks all over the road cruising. WTH?
08-22-2017, 08:21 PM
#44
Melting Slicks
Thread Starter
Answered your own question.
When I was a lad 'truck paths' worn into road surfaces was called crowning. A badly crowned surface will cause ultra-wide tires used w/ ZR1/Z06/CE to crawl all around.
All that's really needed?
Heavily traveled road, especially by trucks should be avoided if a relaxing cruise is what's wanted.
When I was a lad 'truck paths' worn into road surfaces was called crowning. A badly crowned surface will cause ultra-wide tires used w/ ZR1/Z06/CE to crawl all around.
All that's really needed?
Heavily traveled road, especially by trucks should be avoided if a relaxing cruise is what's wanted.
08-22-2017, 08:23 PM
#45
Pro
I have the 427 also, and mine tends to tramline like you mentioned. It also seems mine is more susceptible when the tires are cold.
I agree with comments that it's the wide tires and shoulder design. I live with it and enjoy the car!
I agree with comments that it's the wide tires and shoulder design. I live with it and enjoy the car!
08-22-2017, 09:32 PM
#46
Melting Slicks
Thread Starter
Tires. It's a beautiful incredible Beast!!!
08-22-2017, 11:43 PM
#47
my 2011 has the original run flats at only 12700 miles and always garaged when not being driven. It likes to get into the road ruts too, mostly at slower speeds like when coming to a stop. When running on a smooth road it goes straight as an arrow. So at this point I'm not going to mess with anything.
Its so frustrating when you get an alignment and things end up worse like wandering or a non centered steering wheel.
Its so frustrating when you get an alignment and things end up worse like wandering or a non centered steering wheel.
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hotrod03 (08-23-2017)
08-23-2017, 09:58 AM
#48
Tech Contributor
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hotrod03 (08-23-2017)
08-23-2017, 12:28 PM
#49
Le Mans Master
I was just driving my C6 on I-5 in Oregon. Even otherwise smooth stretches are noticeably rutted. They really want to push the car around. I assume they're the result of wear from studded tires.
08-23-2017, 01:28 PM
#51
Melting Slicks
Thread Starter
Last edited by hotrod03; 08-23-2017 at 01:29 PM.
08-23-2017, 04:46 PM
#52
Melting Slicks
Member Since: Jul 2010
Location: Tacoma, Wa/Surprise, Az
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Thank you so much for your input!! I have been researching options with non run flats but I don't know if it would cure the issue. The only size I have found in non run flats is 345 x 20"" wheels. I have the ZR1 wheels. 20" rear and 19" front. Fronts are available 285 x 19"" non run flats. I may try that, but honestly I'm not sure it would help. Thanks again for your input!! The car is so incredible, I would not have a problem with the
Tires. It's a beautiful incredible Beast!!!
Tires. It's a beautiful incredible Beast!!!
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hotrod03 (08-23-2017)
08-23-2017, 10:43 PM
#55
Melting Slicks
what is not far off?
I know my left front was down the cord on the inside (worse than this one) and it was still within alignment "specs". I finally got a Pfadt (sp) alignment, new set of Michelins and hope it works out.
Last edited by LowRyter; 08-23-2017 at 10:48 PM.
08-24-2017, 12:04 AM
#57
Tech Contributor
It may depend on the tire brand and how stiff the sidewalls are.
I had Michelin PS2 run flats and when I switched to Nitto Invo non run flats my car stopped trying to have a mind of it's own by following the ruts in the road.
It drove so much better. I no longer had to fight to keep it going where I wanted it to go.
Maybe the Michelin tires have a stiffer sidewall, even the non run flats.
I had Michelin PS2 run flats and when I switched to Nitto Invo non run flats my car stopped trying to have a mind of it's own by following the ruts in the road.
It drove so much better. I no longer had to fight to keep it going where I wanted it to go.
Maybe the Michelin tires have a stiffer sidewall, even the non run flats.
08-24-2017, 12:26 AM
#58
Melting Slicks
Member Since: Jul 2010
Location: Tacoma, Wa/Surprise, Az
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The factory specs are quite broad, so when you put the car on the alignment rack, the tech will bring up the factory specs on his machine and start adjusting until he obtains all greenindicators, bounce the frame to try to settle it,, then go for a quick tested and he's done.
What Aaron Pfadt did was just use the same factory specs and tighten the tolerances.
The reality of it is, the rubber bushings in the suspension don't return to 0 very well. You can take your car off the alignment rack, drive it around the block a couple of times and go back on the rack. The alignment will have changed, you'll see different numbers, and they may or may not be in the green. So far as I have found, the two biggest determinants for tire wear are toe ,settings and camber settings. If yp u want some performance, a little camber, like -1 degree, a nd 0 toe front, 1/16th total toe, rear. Add more camber for more performance
08-24-2017, 12:56 AM
#59
Drifting
08-24-2017, 01:05 AM
#60
Burning Brakes
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
The previous owner told me that he almost felt that he made a mistake buying the car since he hated the feel of the car and its wandering. The car still had the OEM Goodyear F1 run flats on it.
I looked at the vehicle alignment report printout before and after specifications and saw that the alignment was significantly out of spec in front L&R Caster and R toe which was out a long way (+5/32) possibly due to being curbed. The rear toe was also found to be excessive.
The new settings were were adjusted close to or at the minimum recommended settings where as before they exceeded the maximum recommendations.
The car now tracks and handles very well and is extremely stable at speed.