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ZL1 Wheels/Tires Wheels and tires discussion for ZL1

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Old 12-28-2011, 01:43 PM   #76
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Originally Posted by gbosh View Post
There is still some big problems some of you have not considered. GM has failed to mention that it's special hood will suck up road chemicals kicked up by other cars and trucks! Just think calcium chloride all over your engine,it's one chemical in road salt and it likes to corode metal on contact. So think about what your vacuum hood will pick up on salted roads. Hear that sucking sound!
You know the roads aren't free of debris, dust, contaminants, etc. all other times of the year, right?

That also means you shouldn't drive down dusty roads, dirt/sand roads, definitely nothing near a construction site. Skip all road construction routes. Etc.

Skip driving behind any "big rig" anywhere within a mile or so of it due to lingering chemicals in the air from the exhaust. Stay away from cars leaking oil, burning oil or otherwise bad combustion from their tail pipes. You're going to need to avoid dense traffic altogether, because there's no telling what will get "sucked up" in to the engine bay.

Some of you guys act like this car is some dainty little princess that can't handle even the slightest bit of stress.
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Old 12-28-2011, 01:48 PM   #77
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Old 12-28-2011, 06:06 PM   #78
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Both in terms of drawing air out from the engine compartment by directly venting hot air from behind the radiator, reducing lift...and the resulting downforce generated from the slipstream blowing over the hood...

It does suck help suck the car down to the road a little bit...

I wouldn't drive my ZL1 through the living room to clean the carpets, though...
Chevrolet, in their preliminary info, mentioned "vacuum carbon fiber"...which is a manufacturing technique NOT employed on every carbon fiber part. It's an extra step to help ensure more uniform thickness, less "captured" air within the c/f and, ultimately, stronger-denser-lighter pieces.

Since then, all manner of erroneous info about "vacuum" has been propogated about the hood/car.

An effective extractor hood will allow otherwise-trapped air to escape, decreasing lift. Whether it's made from c/f or LEAD is irrelevant.

And, frankly, any Camaro sporting a big-ass rear blade spoiler SHOULD have an effective front splitter and/or extractor hood to stabilize and maintain the balance of the overall car, front-to-rear. Tall blade spoilers capture more air which then pushes down on the rear which, without a counterbalance, will LIFT the front...think "fulcrum", or "teeter-totter"...

Admittedly, correct aero is less of an issue at legal highway speeds...but for those wanting to "Maxton Mile" their ZL1s, you'll be very happy GM spent some time in the 'tunnel.

Just like the erroneous info being propogated about the use of summer-only tires by people with little/no first-hand experience in serious winter conditions, be they temperature- or snow-related. Wrong tire choice could cost you your ride...and worse...

Rant over...back on-topic...
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Old 12-28-2011, 06:10 PM   #79
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Originally Posted by LOWDOWN View Post
Chevrolet, in their preliminary info, mentioned "vacuum carbon fiber"...which is a manufacturing technique NOT employed on every carbon fiber part. It's an extra step to help ensure more uniform thickness, less "captured" air within the c/f and, ultimately, stronger-denser-lighter pieces.

Since then, all manner of erroneous info about "vacuum" has been propogated about the hood/car.

An effective extractor hood will allow otherwise-trapped air to escape, decreasing lift. Whether it's made from c/f or LEAD is irrelevant.

And, frankly, any Camaro sporting a big-ass rear blade spoiler SHOULD have an effective front splitter and/or extractor hood to stabilize and maintain the balance of the overall car, front-to-rear. Tall blade spoilers capture more air which then pushes down on the rear which, without a counterbalance, will LIFT the front...think "fulcrum", or "teeter-totter"...

Admittedly, correct aero is less of an issue at legal highway speeds...but for those wanting to "Maxton Mile" their ZL1s, you'll be very happy GM spent some time in the 'tunnel.

Just like the erroneous info being propogated about the use of summer-only tires by people with little/no first-hand experience in serious winter conditions, be they temperature- or snow-related. Wrong tire choice could cost you your ride...and worse...

Rant over...back on-topic...
All very good info and commentary!!
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Old 12-28-2011, 06:40 PM   #80
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Originally Posted by LOWDOWN View Post
Chevrolet, in their preliminary info, mentioned "vacuum carbon fiber"...which is a manufacturing technique NOT employed on every carbon fiber part. It's an extra step to help ensure more uniform thickness, less "captured" air within the c/f and, ultimately, stronger-denser-lighter pieces.

Since then, all manner of erroneous info about "vacuum" has been propogated about the hood/car.

An effective extractor hood will allow otherwise-trapped air to escape, decreasing lift. Whether it's made from c/f or LEAD is irrelevant.

And, frankly, any Camaro sporting a big-ass rear blade spoiler SHOULD have an effective front splitter and/or extractor hood to stabilize and maintain the balance of the overall car, front-to-rear. Tall blade spoilers capture more air which then pushes down on the rear which, without a counterbalance, will LIFT the front...think "fulcrum", or "teeter-totter"...

Admittedly, correct aero is less of an issue at legal highway speeds...but for those wanting to "Maxton Mile" their ZL1s, you'll be very happy GM spent some time in the 'tunnel.

Just like the erroneous info being propogated about the use of summer-only tires by people with little/no first-hand experience in serious winter conditions, be they temperature- or snow-related. Wrong tire choice could cost you your ride...and worse...

Rant over...back on-topic...
I love learning! Thanks LOWDOWN.
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Old 12-28-2011, 07:01 PM   #81
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Don't be wimpy afraid of the cold weather !!!!!!! This car is going to make a statement and you shouldn't let a set of tires frighten you guys... Buy a set of All Season Performers if you are that worried and honestly those that say they are gonna use a ZL1 as a Daily Driver are full of BS.... and are they really gonna cover Powertrain/Drivetrain warranties if you race at the Track and you break something ????
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Old 12-28-2011, 07:07 PM   #82
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Don't be wimpy afraid of the cold weather !!!!!!! This car is going to make a statement and you shouldn't let a set of tires frighten you guys... Buy a set of All Season Performers if you are that worried and honestly those that say they are gonna use a ZL1 as a Daily Driver are full of BS.... and are they really gonna cover Powertrain/Drivetrain warranties if you race at the Track and you break something ????
Uhm..... It never hurts to ask.
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Old 12-28-2011, 07:14 PM   #83
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Originally Posted by mr02Z/28 View Post
Don't be wimpy afraid of the cold weather !!!!!!! This car is going to make a statement and you shouldn't let a set of tires frighten you guys...
These tires, on this car, in the winter...should frighten everybody!

Buy a set of All Season Performers if you are that worried
Do you know of anybody that produces a 305/20 All-Season?

and honestly those that say they are gonna use a ZL1 as a Daily Driver are full of BS....
I'd be one of those. And "honestly"...I'm not full of BS.

and are they really gonna cover Powertrain/Drivetrain warranties if you race at the Track and you break something ????
It would have to break first, wouldn't it? Seriously though...they've never covered damage suffered at a HPDE. Considering the track-testing this car endured...maybe this could change?
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Old 12-28-2011, 07:16 PM   #84
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Old 12-28-2011, 07:29 PM   #85
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So make your car a Garage Queen.... I'm sure this car isn't made to be a Daily Driver, as you may think.......I am betting most folks that purchase this ZL1 are going to park it for nice sunny days, I can't imagine anyone that would even try to drive this car @ 32 degrees with a chance of Snow...seriously....and if someone says it's going to be used as a DD, I'll call the bluff....Anyway, I bet by March there will be tire sizes that will be All Weather for the ZL1....



If you ever race... you shold know....always a possibility of breakage...doesn't matter how tough the the quality control is on the parts...stuff will break
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Old 12-28-2011, 07:38 PM   #86
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Originally Posted by mr02Z/28 View Post
I'm sure this car isn't made to be a Daily Driver, as you may think.......I am betting most folks that purchase this ZL1 are going to park it for nice sunny days.
They designed this car like any other car: they all must pass climate testing (rain, snow, salt, debris, etc). Furthermore - all of the Capture Test Fleet cars will be driven in the cold Michigan winters in the next few months.

I can't imagine anyone that would even try to drive this car @ 32 degrees with a chance of Snow...seriously....and if someone says it's going to be used as a DD, I'll call the bluff.
The Cobalt I currently drive around in will serve in the winter months. But in the spring, summer, and fall, my Z will be driven daily.

If you ever race... you shold know....always a possibility of breakage...doesn't matter how tough the the quality control is on the parts...stuff will break
Of course. You're absolutely right. I was simply making a quip about how overbuilt this car is. I predict failures, in stock form, will be very rare.
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Old 12-28-2011, 07:58 PM   #87
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actually they didn't.... I guess you forgot the 580HP S/C motor....Unlike Most cars and Track Ready Performance built in... Is that like "Most Cars" ?????
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Old 12-28-2011, 08:03 PM   #88
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actually they didn't.... I guess you forgot the 580HP S/C motor....Unlike Most cars and Track Ready Performance built in... Is that like "Most Cars" ?????
Yessssss....but the ZL1 underwent all the same foul-weather testing any other GM car goes through. So it's not any more fragile in that respect than, say, a Malibu. That was my point in response to your comment suggesting it is not up to the challenges of a daily driver.
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Old 12-28-2011, 08:06 PM   #89
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Old 01-06-2012, 07:11 AM   #90
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It is not recommended to use the high-performance summer tires when temperatures drop to approximately 40 degrees F (5 degrees C) or below. It is recommended these tires be stored indoors at temperatures above 20 degrees F (-7 degrees C) when not in use.
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Old 01-06-2012, 10:39 AM   #91
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Yessssss....but the ZL1 underwent all the same foul-weather testing any other GM car goes through. So it's not any more fragile in that respect than, say, a Malibu. That was my point in response to your comment suggesting it is not up to the challenges of a daily driver.

My car will only be driven on Saturday or Sunday, providing the wind is blowing from the south at 2.5 miles per hour with 3 to 5% cloud cover and a max temerature of 75 degrees + or - 5 degrees! Yes its my daily driver!
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Old 01-06-2012, 11:47 AM   #92
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While "intended" for possible track use, I'm not too sure that the factory warranty would cover such "abuse". Read the owner's manual for exclusions. Tracking the ZL1 VOIDS the warranty among other things. Check it out! It's in print.

Yeah, my ZL1 will be my 3 season DD!
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Old 10-07-2012, 05:50 PM   #93
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bump for it's almost time to start thinking about winter storage temps and whatnot
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Old 10-07-2012, 05:53 PM   #94
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bump for it's almost time to start thinking about winter storage temps and whatnot
Store them with me in Texas at our climate controlled warehouse. We'll Pedderise them over the winter I'll make sure the tires don't get flat spots
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Old 10-07-2012, 06:04 PM   #95
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bump for it's almost time to start thinking about winter storage temps and whatnot
I guess there are pros and cons to living in the desert! I don't have to worry to much bout this as it RARELY snows and rarely gets below 40 even at night..
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Old 10-07-2012, 06:42 PM   #96
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This tire issue has been discussed about a year ago,where was everybody? I was the first to post this problem with cold temps for these tires and all the same Goodyear info was posted as now and Scott also commented about the summer only tires on the ZL1.
And more important is the ethanol gas in cars. If at all possible fill the tank with gas that does not contain ethanol,really bad stuff for storage in cars.
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Old 10-07-2012, 06:46 PM   #97
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This tire issue has been discussed about a year ago,where was everybody? I was the first to post this problem with cold temps for these tires and all the same Goodyear info was posted as now and Scott also commented about the summer only tires on the ZL1.
And more important is the ethanol gas in cars. If at all possible fill the tank with gas that does not contain ethanol,really bad stuff for storage in cars.
Would you like a prize?
I bumped the thread for people that have not yet seen it/people that joined the community since it was made/last posted in.
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Old 10-07-2012, 06:49 PM   #98
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just picked up my pirelli's this weekend...figure I have another month before making the switch
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Old 10-07-2012, 06:54 PM   #99
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Would you like a prize?
I bumped the thread for people that have not yet seen it/people that joined the community since it was made/last posted in.
...good idea, thanks for bringing it forward again to give those who don't know the opportunity to learn about it, there are many new owners among us that don't know.
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Old 10-07-2012, 07:30 PM   #100
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Yessssss....but the ZL1 underwent all the same foul-weather testing any other GM car goes through. So it's not any more fragile in that respect than, say, a Malibu. That was my point in response to your comment suggesting it is not up to the challenges of a daily driver.

I have to agree with my serial number buddy. Us serial #214 cars have to stick together. I bought my ZL1 as my daily driver. In FL I am not stressing the cold weather as I will be lucky to see below 40 overnight and have no chance of snow. If I lived up north I would buy a set of crappy 20" rims with All Season tires. People keep acting like this car is some one off vehicle. It is a CAMARO. For the winter run a set of all seasons on a smaller width rim size. Run 20 by 8 and 20 by 9 rims. There are a ton of choice and tires to fit. It is not like you will be pulling 1G through the turns or drag racing when there is snow on the ground. Guys with SS or RS packages have been doing this for years because the Pirelli tires are crap in the cold too. Are LE1 package cars not practical as a DD too? Same tires... (which I hope will inspire tire makers to produce more options for us. I expect a ton of LE1 guys to want bigger rear tires even if it upsets the balance of the car. They for sure will be looking for cheaper just like many ZL1 drivers.)

BTW It has rained everyday from the time I bought my car. BUT she has not given me any issue in the rain. If you have driven a high HP car ever in your life you should know that common sense will keep you out of trouble. Low rpm and proper spacing make weather no big deal. One day last week I could not see 2 car lengths in front of me it was raining so hard. The streets were flood in downtown were I work. I had no issues. The rain diverters in the hood worked great too. When I got home I checked the engine.... dry. Also with the undertray it keeps a ton of dirt from being kicked up into the engine bay.

This car is basically a CTS-V and those cars are great daily drivers. Why would this one not be? Mine has been. Better in fact than my SS. The dual mode exhaust is quieter than my MBRP exhaust but make great sounds when I want it to. The biggest surprise is in touring mode the ride is a ton smoother.

So drive your cars they should not be garage queens. Heck I am have such a hard time saying out of mine that we took it for grocery shopping this week for no other reason than it is FUN to drive.

EDIT: Highlighted the important part of my post. Short answer is buy Snow tires on a 2nd set of rims. No big deal.
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