Cup 2 problems or the car or the Z07 suspension?
07-17-2018, 09:18 PM
#21
Melting Slicks
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How many times does this need to be addressed about the special 2 REAR caster tools needed. It is a digital alignment tool + an adapter tool. BOTH of these can be ordered by the Service Manager thru Global Connect using the Tool Loan program. It will be sent by 2 day mail (FREE) or can be overnited if customer wants to pay. The tool can be kept for 5 days then returned, nothing to purchase by anyone. Just had this done 2 July at my GM dealer who doesn't even sell ANY corvettes. I went in with the instructions of how to do this & was shocked when the service manager said "Sure I know how to do this, we service quite a few vettes". I knelt by his desk & watched him log on to Global Connect site, hit the enable button for tool loan & site shows if the tool is available (should be). He ordered it, came in right on time, scheduled-did the alignment & back the tool went. Was kinda strange they had the adapter at the dealer but not the actual Digital readout tool. I believe there is an annual fee of approx. $700 by dealer to have this access but they need many specialty tools that are too expensive to buy but needed many times per yr. on other models so is very cost effective. PS: Just googled GM tool loan program & first site explains it started in 2016 & how dealers use it.
07-17-2018, 09:24 PM
#22
Melting Slicks
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I have the cup2 on my car and I got the car a week ago and daily it (im changing the tires soon), but it gets very sketchy at times when I hit small holes on the road or any part of the road thats not smooth the car starts pulling and here in LA we dont have the best highways so at 80mph when I hit a imperfection on the road the wheel pulls and it very scary. Anyone have the same experience? Is it the cup2's or maybe the z07 suspension? Any tips would be appreciated
07-17-2018, 09:54 PM
#23
Pro
Thread Starter
Just a thought but what drive mode (steering) are you using? For many of us Tour Steering mode is way too sensitive to road changes even just the weight of hand(s) on steering wheel cause you to constantly make minute adjustments. Very easy for car to wander if you take your eyes off the road for even a few seconds. Again (you probably know) the STEERING (Tour/Sport/Track) mode can be selected separate from driving mode or linked to it. Just a thought since you didn't say what steering mode you drove in.
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madrob2020 (07-17-2018)
07-17-2018, 10:14 PM
#24
Racer
Alignment.
I LOVE my Sport Cup 2s. Got 16k out of the first set and now have 4k into the second set. Amazing sticky tire. My car is stable at speed and not at all twitchy like you speak of. I did get a proper STREET 4 wheel alignment at one of the larger Corvette dealers here in Houston right after I got the car. Tires wear very evenly.
I LOVE my Sport Cup 2s. Got 16k out of the first set and now have 4k into the second set. Amazing sticky tire. My car is stable at speed and not at all twitchy like you speak of. I did get a proper STREET 4 wheel alignment at one of the larger Corvette dealers here in Houston right after I got the car. Tires wear very evenly.
Last edited by 1 HOT 07; 07-17-2018 at 10:16 PM.
07-18-2018, 12:29 AM
#25
Tech Contributor
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How many times does this need to be addressed about the special 2 REAR caster tools needed. It is a digital alignment tool + an adapter tool. BOTH of these can be ordered by the Service Manager thru Global Connect using the Tool Loan program. It will be sent by 2 day mail (FREE) or can be overnited if customer wants to pay. The tool can be kept for 5 days then returned, nothing to purchase by anyone. Just had this done 2 July at my GM dealer who doesn't even sell ANY corvettes. I went in with the instructions of how to do this & was shocked when the service manager said "Sure I know how to do this, we service quite a few vettes". I knelt by his desk & watched him log on to Global Connect site, hit the enable button for tool loan & site shows if the tool is available (should be). He ordered it, came in right on time, scheduled-did the alignment & back the tool went. Was kinda strange they had the adapter at the dealer but not the actual Digital readout tool. I believe there is an annual fee of approx. $700 by dealer to have this access but they need many specialty tools that are too expensive to buy but needed many times per yr. on other models so is very cost effective. PS: Just googled GM tool loan program & first site explains it started in 2016 & how dealers use it.
Bill
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madrob2020 (07-18-2018)
07-18-2018, 11:03 AM
#26
Mine wore evenly and still had tread above the wear indicator. Likely could have gotten 2k or more out of them but was headed out on a fairly long vacation trip to the San Juan mountains. I drive the car pretty hard when I have the chance. I was pretty amazed at their life span as I only got 10k on the Potenza's I ran on my Ford GT.
08-19-2018, 10:39 PM
#27
1st Gear
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This is great advice.
The 3 things that helped my Z07 drive 100 times better on the street, one, get you car aligned by someone who knows how to do a new Corvette, mine was off from the factory, and the alignment was covered under warranty. Two, get rid of the cup tires if your just driving on the street. Three, get the magnetic suspension update, it made my car night and day difference on the roads I drive on. 
08-20-2018, 09:45 AM
#28
Burning Brakes
I have to disagree with those that think the Z06 handling problems is in the alignment. Its made for perfect roads and not very forgiving on anything else! My base stingray is much better all around driving car than my Z06 and yes the alignment has been checked. There is less tire between the rim and road with the Z06 and their width does not fit the ruts in the road created by heavy trucks. It is strictly two hands on the wheel when you encounter this. The radial tire has the ability to adjust to road conditions so movement is not transmitted to the driver. But this advantage is lost with rubber band tires and runflat design!
08-20-2018, 08:52 PM
#29
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When I read your report, I'm a bit surprised.
What are those only for workshops, Corvette Handler without tools?
In the US, the parent company of the Corvette
We do a lot of alignments on the C7 Corvettes.
I always say to my boys:
On the Corvette C7, the rear axle / caster alignment is the most important.
Cölestin
What are those only for workshops, Corvette Handler without tools?
In the US, the parent company of the Corvette
We do a lot of alignments on the C7 Corvettes.
I always say to my boys:
On the Corvette C7, the rear axle / caster alignment is the most important.
Cölestin
Bill