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Camaro Z/28 Forum - Z/28 Specific Topics Discussions related to the 5th gen Camaro Z/28 model

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Old 05-12-2013, 01:38 PM   #1
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2014 Z/28 to weigh 3,750...

Please see Al's comments below:

The last time we talked to Al Oppenheiser he set the world on fire with the incredible ZL-1. Then the 1-LE was introduced, and now, to prove that Chevrolet is the performance car manufacturer, it has re-launched the grand-daddy of all nameplates in our opinion, for road racing and Chevrolet, the Z/28. The chief engineer of the Z/28 gives us a deep dive into the car, how it came to life, and what to expect when you drive it. Welcome to Chevy Hardcore’s ”Five Questions” with Al Oppenheiser. Chevy Hardcore: Tell us about the significance of the new Z/28 to Chevrolet performance.

Al Oppenheiser: “The most asked questions since we launched the new car in 2009 were: Where is the Z/28? When are you coming out with a Z/28? Why didn’t you call the ZL-1 the Z/28? Why didn’t you call the 1-LE the Z/28? As I have said before, we are never done with performance. Have faith. We are never done making the car better, and this was the car that we knew was coming. The car itself had to be deserving of the historic Z/28 name. This one definitely is deserving. I’m telling you, this will be a car like no other that you have ever driven.”

CHC: What are some of the performance highlights, especially aerodynamics, of the new car that sets the Z/28 apart from all other Camaros?

AO: “If you start with an SS, which is our 426 V-8, we have gone after the things that make the car go around the track faster – Go, Stop and Turn are our three mottos. The Go is the naturally aspirated LS-7 plucked right out of the Corvette. These are hand-built at the Wixom Performance Build Center and have no shortage of power.

“We also set the team on a mission to put the car on a diet, and have set a goal to take at least 100 pounds out of the standard SS, which is more than 300 pounds lighter than a ZL-1. We are not done yet, but we have already met our goal of removing at least 100 pounds from the car. We have also done things like added carbon ceramic brakes on 19-inch 305-series tires, front and rear. The overall unsprung mass at each corner is lighter. We have also down-gauged the thickness of the back windshield; and we redesigned the rear seat, using lighter weight materials, instead of removing it.

We have also done some things that you should do with a Z/28 track car. We have taken the air conditioning out of it. You have to order that special. It does not come with air conditioning standard and it does not come with an audio system standard.

We’ve got one speaker in the car and the only reason that we have one speaker in the car is because you need a speaker to have the seat belt chime audible to the driver. You can option up, if you desire, the air conditioning and a base radio system. We have been very strategic in where we have taken mass out of the car.

You mentioned aerodynamics. The car has a unique front splitter, different from the ZL-1. We have lowered the ride height, so that specific rocker panels, rear fascia, and rear spoiler in the car – at some point when we tell you how much, it will knock your socks off how much down force this car makes.”

CHC: Obviously with the LSA making 580 horsepower, was there a strategy behind picking the normally aspirated LS-7 for the Z/28 versus the already 580 horsepower available in the ZL-1?

AO: “Absolutely, that goes back to the question, ‘Why didn’t you call the ZL-1 a Z/28′? As you know the ZL-1 harkened back to the ‘69 aluminum block ZL-1 that we did. It had the highest horsepower that was in a Chevrolet at the time. We thought that a supercharged aluminum-block, high-horsepower engine was more deserving of a ZL-1 name, not a historical Z/28 name. So, naturally aspirated and the 427, it just equates back to what a road racing car should be, and not to take anything away from the ZL-1, but if it were to stand true to the Z/28 name, a supercharged engine didn’t belong under the hood.”

CHC: Speaking again of power-to-weight ratio as sort of that all-mighty watermark of performance, are there any other ways that Chevrolet could see shaving weight from the Z/28 in the future models?

AO: “Absolutely, as I mentioned, our goal was 100 pounds and have already exceeded that.

We’re approximately a year away from bringing it into production, so we’re not done yet. We are always looking for lightweight materials. To give you reference in terms of lap time, you would have to remove 250 pounds to get another second on the track and have to weigh that against another tenth of a G in lateral acceleration. I can get that same second on the track.

So you have to weigh where you are going to get your lap time down and these P-ZERO Trafeo R tires are capable of a 1.05 g-max sustained lateral acceleration and we’ve already seen decel’s of 1.5 g, so we’re getting better lap times in other ways. But the 100 pounds definitely helps the lap time. We took significant chunks out as opposed to an ounce here and there, helping us on the track.”

CHC: One last question. We thought it was interesting that instead of going with the magnetic ride such as on, say the ZL-1, you went with not only a dual adjustable shock but a true racing style four-way adjustable shock. Is this technology you chose again specifically for the Z/28 or was it that you really wanted to differentiate the two cars?

AO: “We definitely picked this specifically for this application. Multimatic is the company we’re working with. They are well known for their ability to set up dampers for racing vehicles and we felt that the limitations of the mono-tubes that we’ve got in our 1-LE and, of course, the MR, while it’s awesome on the ZL-1, we didn’t feel it belonged in a Z/28 so we did go with the adjustable dampers that are in the Z-28. They’re truly, again, trying to stay with the heritage of the car. They are track designed specifically for the Z-28.”

Bonus: Do you think that soon after the production launch of the new Z-28 we will see parts and pieces of this car making its way onto scratch built cars, or in some way a program that might mimic in some way the COPO program?

AO: “That’s a great question. We’ve had that debate all the way up through GM President Mark Reuss on whether or not we want to see clones driving around on the streets, and we’ve made the decision that since offering performance parts helps sell Camaros, we’ve got a great performance parts team now under Vice President, Performance Vehicles and Motorsports Jim Campbell, who is growing that very dynamic industry.

“You will see Z/28 performance parts available for other Camaros and you know specifically as far as suspension, drift, and so on, you’re going to see those parts. Some of the parts are kind of integrated into the body but we definitely plan on allowing customers to have the opportunity to get ahold of some Z/28 parts for their car.”

Thanks again to Al Oppenheiser for his time with Chevy Hardcore. This has been another segment of “Five Questions.” Stay tuned for more!
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Old 05-12-2013, 01:42 PM   #2
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Besides being road-course ready it should hit the drags quite well.

3,750 lbs. 450 rwhp. = 1/4 in 11.8
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Old 05-12-2013, 02:02 PM   #3
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The thing sounds like it will be incredible. I like how AO says they aren't done yet.

One thing though he says they will make parts available from the Z/28 yet the ZL1 parts are still MIA. I want those damn brakes.

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Old 05-12-2013, 02:19 PM   #4
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The thing sounds like it will be incredible. I like how AO says they aren't done yet.



One thing though he says they will make parts available from the Z/28 yet the ZL1 parts are still MIA. I want those damn brakes.

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I agree!

Aren't the ZL1 front brakes already available? I thought the showed them at SEMA?
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Old 05-12-2013, 02:24 PM   #5
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I agree!

Aren't the ZL1 front brakes already available? I thought the showed them at SEMA?
Still waiting on pricing and availability.

If I wanted I could piece the parts together and probably pay $750-$1000 more than what the kit will come in at.

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Old 05-12-2013, 02:29 PM   #6
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Great info...I'm starting to thnk the z28 will cost over 70k
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Old 05-12-2013, 02:37 PM   #7
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Wow at that weight it will be a monster stock just imàgine what it will be like with full bolt-on's and a cam!!!!! A 10sec car that's built for the track not the strip is simply amazing. If it where me I would add the ac/radio and make it a dd.

I wonder if guys shopping for a vette will cross shop with this car since its performance numbers are so close except the camaro is bigger more comfy and has four seats.
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Old 05-12-2013, 03:01 PM   #8
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I still don't know what the heck my SS weighs...lol...best I come up with is 4680lbs(GVWR) minus 732lbs (passengers and cargo) equals 3948lbs...

z/28 at 100 lbs less than an SS puts it at 3848lbs....I dunno....lol...
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Old 05-12-2013, 03:09 PM   #9
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Not that it's a big deal, but this is the first time I've read there would be another option in additin to A/C, the base radio system.
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Old 05-12-2013, 03:26 PM   #10
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I still don't know what the heck my SS weighs...lol...best I come up with is 4680lbs(GVWR) minus 732lbs (passengers and cargo) equals 3948lbs...

z/28 at 100 lbs less than an SS puts it at 3848lbs....I dunno....lol...
3,846 I believe.
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Old 05-12-2013, 03:54 PM   #11
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Not that it's a big deal, but this is the first time I've read there would be another option in additin to A/C, the base radio system.
Yeah it's the first time I've seen that also and it's a good thing because I'm sure there will be people that would want atleast a base radio. If I was able to buy one mine would have ac and the radio even if it's throws off the balance of the car slightly since my intentions would be to daily drive it and track it not just track it.
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Old 05-12-2013, 04:23 PM   #12
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“We also set the team on a mission to put the car on a diet, and have set a goal to take at least 100 pounds out of the standard SS, which is more than 300 pounds lighter than a ZL-1. We are not done yet, but we have already met our goal of removing at least 100 pounds from the car.

CHC: Speaking again of power-to-weight ratio as sort of that all-mighty watermark of performance, are there any other ways that Chevrolet could see shaving weight from the Z/28 in the future models?

AO: “Absolutely, as I mentioned, our goal was 100 pounds and have already exceeded that.

We’re approximately a year away from bringing it into production, so we’re not done yet. We are always looking for lightweight materials.
Awesome stuff 2nd Chance! Thanks for posting!

And...incredible effort Mr. Al Oppenheiser- thank you for this car. Having lived in the Porsche world for years, I see what you've done and I can't wait to thrash this bad boy on track as an owner. The spec shows this is real, not marketing. Thank you for not patronizing us trackers. The brakes show you are real.

I have three words for you in regards to the rest of the weight optimization: "Akropovic titanium exhaust". Headers back, 300 cell cats. Make it an option if you have to because it's another $9000 or so at your cost and the whiners on here will go nuts. Worth every penny. Do it. That is the final "oh holy sh*t" piece of the package. Whiners- just shut up and sit back and watch as GM (G f'ing M?) does a track car right from the factory.

Personally I look forward to spanking some GT3 ass at the track.

That is all. Carry on.
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Old 05-12-2013, 04:43 PM   #13
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Yeah, it's looking very impressive. Also FYI, the rwhp number I showed is on the low side of what I've been reading for an LS7. I've read it to be as high as 480. Where it ends up on the Z/28 we'll have to wait and see.

For grins, 3,700 lbs. 480 rwhp = 11.5 1/4. With numbers like that and what we already know about its handling 1.05 G this thing is gonna be crazy!
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Old 05-12-2013, 05:04 PM   #14
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Still waiting on pricing and availability.

If I wanted I could piece the parts together and probably pay $750-$1000 more than what the kit will come in at.

Sent from my friggin Droid by two thumbs using Tapatalk 2 or whatever the ish it's called....
Yep. Just checked the catalog yesterday and no pricing available yet.
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Old 05-12-2013, 09:15 PM   #15
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Interesting that they are making a "base radio system optional" and they're still working on weight.

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Originally Posted by 2cnd chance View Post
3,750 lbs. 450 rwhp. = 1/4 in 11.8
Was that something you heard from Al O, or were you doing some math with hypothetical hp numbers?

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I wonder if guys shopping for a base vette will cross shop with this car......
Yup....at least I will.
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Old 05-12-2013, 09:25 PM   #16
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cant wait too see what the other peformance parts are that they will be coming out with
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Old 05-12-2013, 09:44 PM   #17
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Interesting that they are making a "base radio system optional" and they're still working on weight.



Was that something you heard from Al O, or were you doing some math with hypothetical hp numbers?



Yup....at least I will.
Playing with numbers.
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Old 05-13-2013, 08:00 AM   #18
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ZL1 coupe is 4120, 300 lbs. less is 3,820...heres the media link with good info on both the Z-28 and ZL1, official of course...
http://media.gm.com/content/media/us...-z28/2014.html
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Old 05-13-2013, 09:29 AM   #19
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The comments were based on a comparison to the SS. They lost more than 100 lbs and "we're not done yet".
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Old 05-13-2013, 11:41 AM   #20
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The factory weight for the SS is 3860 lbs so if they've reduced that by more than 100 lbs the weight of the Z/28 is definitely below 3760. And based on what AO said about them removing pounds, not ounces they're probably driving hard towards 3700 or lower.

I know they've spent time with Justice Pete on suspension tricks and issues he uncovered with his Pedderized Camaros. I also have this feeling they may have spent some time looking at my project thread which was all about weight reduction... and not just any weight but specifically unsprung weight. I'm down to 3688 and that's with a full tank of gas, A/C, full factory sound system and the stock interior completely intact including the heavy factory seats, so I KNOW there's still potential areas of improvement which I fully expect they're exploring.

They've said nothing about flywheel, clutch, driveshaft. Not only reducing weight but reducing inefficiency and resistance in the drivetrain lets more power make it to the rear wheels. A stock SS is rated at 426 hp but only about 370 makes it to the rear wheels. That's 56 hp being eaten up by the inefficiency of everything between the engine and the rear wheels. I gained 9 hp to the rear wheels just by switching from the inefficient factory 2-piece driveshaft to a 1-piece driveshaft. Weight and efficiency of the flywheel and clutch play a big part too. Better oils can play a part in reducing friction which eats away at power transfer. It's going to be interesting to see what they've done with drivetrain efficiency.

Al O's dialog is extremely encouraging because it shows they have approval from the top to DO IT RIGHT. They have one of the very best people in the industry, Mark Stielow in charge. And they also have the great advantage of the fact that they make the car to begin with so they can do all kinds of things that just wouldn't be practical or possible for us as individuals to do.

I have the feeling this car's performance is not only going to surprise people, but outright shock them at what it can do. The fact you'll be able to drive it off the showroom floor with this level of performance is almost ridiculous lol.
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Old 05-13-2013, 11:47 AM   #21
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hello $80,000 wooooooooo
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Old 05-13-2013, 11:56 AM   #22
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Extensive lightweighting saved 300 pounds over the Camaro ZL1
To optimize the track performance of the Camaro Z/28, the engineering team subjected it to an intensive lightweighting program, saving 100 pounds (45 kilograms) compared to the naturally aspirated Camaro SS and 300 pounds (136 kilograms) to the supercharged Camaro ZL1.

This makes no sense the way he said it. The ZL-1 is 300lbs heavier than an SS. Yet the Z/28 is supposed to be around 300lbs lighter than a ZL-1 AND 100lbs less than an SS. Shouldnt that be 400lbs less than a ZL-1? I mean Im no mathmatician, but as long as I've been knowing and been taught that 4100-400= 3700.
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Old 05-13-2013, 01:34 PM   #23
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Hahaha ^ that is pretty funny.
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Old 05-13-2013, 01:52 PM   #24
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Quote:
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The factory weight for the SS is 3860 lbs ...
What weight is your SS at now Doc?

I am wondering if it costs less to shave the lbs off an SS with mods... or start with a Z28.

Since we don't know the cost of the Z28... probably a moot point.
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Old 05-13-2013, 02:00 PM   #25
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...I'm sure their 300/100 lb reductions were preliminary goals, minimums, guesstimates....They wouldn't have put it out there unless they knew they could meet or beat it...

The final number will be a lot lower and touted as an engineering accomplishment and added "wow-factor"....(as it should be)....
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