The 2014 Camaro Z/28 had a problem spinning its tires. Not doing traditional burnouts, mind, the rubber was actually rotating on the wheels. Well it did, until Chevrolet engineers noticed the vibration that it caused and fixed the flaw.
Chevy observed the issue while it was running laps of the Z/28 on a track. It claims that the Camaro's aggressive Pirelli P Zero Trofeo R tires and were generating so much traction that under braking, the rubber was actually slipping on their wheels. The engineers say that the car can develop 1.5 g of force under deceleration thanks to its Brembo carbon-ceramic brake rotors.
They initially suspected an issue with the tires or wheels, and the test was relatively simple. The engineers marked a chalk line relative to the valve stem and took the Camaro out for a lap. When it came back, they found that the Pirellis had rotated 360 degrees or more.
Of course, now Chevy had to fix it. Scroll down to watch a video of the Camaro Z/28's engineers explaining the problem and their novel solution, plus the press release about it. We have reached out to Chevy with some further questions but have yet to hear back. Look for an update to this post if and when we do.
[youtube:1dd1s01o][/youtube:1dd1s01o]
http://gmauthority.com/blog/2014/03/201 ... age-video/
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2014 Camaro Z/28 Uses “Media Blasting” To Prevent Wheel Slip
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daytonajim
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daytonajim
Topic author - Site Admin
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The 2014 Z/28 Camaro is faster than a Murcielago around the Nurburgring
Nürburgring. In the rain. In a Camaro.
http://www.roadandtrack.com/go/news/vid ... rgring-lap
If anyone ever had a complaint about the new-generation Camaro, it's that in its mission to be a true muscle car it went too far. It was biased towards straight-line performance over handling. But Camaro has a rich track history, as the Donohue/Penske Z/28s demonstrated in Trans-Am.
You're going to be hard pressed to come up with any more objections after you see the 2014 Z/28 on track at the Nürburgring. Recently, GM spent a week and 1,000 miles there in evaluation testing, and development driver Adam Dean ultimately notched up a 7:37.40 lap. Dean doesn't always make it look easy, but he sure gets the car around in a hurry. As GM helpfully points out, he did it in four seconds off the ZL1's time and faster than a Porsche 911 Carrera S and Lamborghini Murcielago LP640. The naturally aspirated Z/28 gets 505hp from the seven-liter LS7 engine; a Tremec TR6060 6-speed; limited slip; areo tweaks including a lip splitter and undertray; giant Brembos and Recaro seats.
Of all of these, I think it's the braking that really stands out. It still isn't going through the corners like a supercar, but the stopping before then is amazingly hard and you do definitely see downforce coming into play on longer corners. When it can sustain 90-plus mph, it sticks very hard.
For about the first six minutes, Dean is cruising. A wide powerband demonstrates itself with small number of shifts and a GoPro on the side shows really well damped and controlled wheel motion--the car has what GM says is the first production car application of spool-valve dampers. Whatever they're doing, it's working. You can see damp spots on the track, but he doesn't have to fight the wheel. However, it soon starts to rain and it gets all kinds of squirrely when the track gets greasy. Among other things, we learn that over about 135mph Camaro's wipers start to lift, so bear that in mind.
GM says their telemetry indicates there's another six seconds in the car, and I think that's conservative. But a 7:31 would be on a Porsche 911 GT2 time, and faster than a GT-R Spec-V (or at least until recently ). Pricing hasn't been announced, but we'd expect it to slot in under the 2014 ZL1, which is coming in at $55,000. Keep an eye on the Z/28 microsite for more.
[youtube:3jvfeoyf][/youtube:3jvfeoyf]
Nürburgring. In the rain. In a Camaro.
http://www.roadandtrack.com/go/news/vid ... rgring-lap
If anyone ever had a complaint about the new-generation Camaro, it's that in its mission to be a true muscle car it went too far. It was biased towards straight-line performance over handling. But Camaro has a rich track history, as the Donohue/Penske Z/28s demonstrated in Trans-Am.
You're going to be hard pressed to come up with any more objections after you see the 2014 Z/28 on track at the Nürburgring. Recently, GM spent a week and 1,000 miles there in evaluation testing, and development driver Adam Dean ultimately notched up a 7:37.40 lap. Dean doesn't always make it look easy, but he sure gets the car around in a hurry. As GM helpfully points out, he did it in four seconds off the ZL1's time and faster than a Porsche 911 Carrera S and Lamborghini Murcielago LP640. The naturally aspirated Z/28 gets 505hp from the seven-liter LS7 engine; a Tremec TR6060 6-speed; limited slip; areo tweaks including a lip splitter and undertray; giant Brembos and Recaro seats.
Of all of these, I think it's the braking that really stands out. It still isn't going through the corners like a supercar, but the stopping before then is amazingly hard and you do definitely see downforce coming into play on longer corners. When it can sustain 90-plus mph, it sticks very hard.
For about the first six minutes, Dean is cruising. A wide powerband demonstrates itself with small number of shifts and a GoPro on the side shows really well damped and controlled wheel motion--the car has what GM says is the first production car application of spool-valve dampers. Whatever they're doing, it's working. You can see damp spots on the track, but he doesn't have to fight the wheel. However, it soon starts to rain and it gets all kinds of squirrely when the track gets greasy. Among other things, we learn that over about 135mph Camaro's wipers start to lift, so bear that in mind.
GM says their telemetry indicates there's another six seconds in the car, and I think that's conservative. But a 7:31 would be on a Porsche 911 GT2 time, and faster than a GT-R Spec-V (or at least until recently ). Pricing hasn't been announced, but we'd expect it to slot in under the 2014 ZL1, which is coming in at $55,000. Keep an eye on the Z/28 microsite for more.
[youtube:3jvfeoyf][/youtube:3jvfeoyf]
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Good info Jim and something that is not well known to the average 'Camaro Person'.
And I'am Very Happy to report there is Zero wheel-to-tire rotation on my #386 .. :handgestures-thumbup: ...at least there wasn't any when I laid down two 50' long Black Marks in Floyd Garrett's parking lot .. :auto-layrubber: :auto-layrubber: :auto-layrubber: :auto-layrubber: :auto-layrubber:
And I'am Very Happy to report there is Zero wheel-to-tire rotation on my #386 .. :handgestures-thumbup: ...at least there wasn't any when I laid down two 50' long Black Marks in Floyd Garrett's parking lot .. :auto-layrubber: :auto-layrubber: :auto-layrubber: :auto-layrubber: :auto-layrubber: