Then just don't take the roof out. Roof out the car is 20% stiffer than the old Z06/ZR1 with the roof bolted in. With the roof lateched in place it's 60% stiffer.

 

Instead of going off topic and talking about me, why don't you address the OP's question in post number 1, which was............. "There's a lot of good information out this morning on the new Z, but has anybody read anything about the weight of the car? I hope all this new down force isn't due to the added pounds. So, what do you think the C7Z will weigh in at? I'm guessing 3350 pounds."

 

I didn't "jump all over" you, I pointed out that your statements that "the Z51 is 3440" was inaccurate, and it is.
Chucks car is under 3400# with a full tank, I didn't weigh mine, but it would be ~3410#. Perhaps a fully loaded up 3LT car might weigh 34xx and maybe the 3LT package adds lots of weight.

I'm betting the Z06 will come in at under 3400#. There are a few videos out there and in at least one of them, one of the engineers comments on "materials" they used "under the hood" to offset the weight of the Eaton. We've heard it's going to have a CF torque tube and I'm sure in coming months will learn more.

Regardless, as much of a pig as people thought the C7 was going to be months before owners took delivery, they've proven to be much faster than the outgoing base and GS C6's. I would expect the C7 Z to be no different, but also figure there will be 8-10 months of people trying to tear the car down and tell us all how it's going to be slow and a step back from the C6 Z06/ZR1, etc., etc..
S.

 

I believe that photo is of the heat shielding in the center tunnel not a carbon fiber torque tube.

 

How about a bottle of locktite

 

Looks like the heat shield is cut away and that is CF underneath it. Would make sense they need to heat shield the torque tube/driveshaft if they were CF.

 

But the specifically said light weight wheels, smaller supercharger I would suspect about 50 pounds less then the ZR1 with near 50/50 distrubution

 

I will make an educated guess that the z07 package will be at 3340 with a half tank of gas. The z51 already has the extra wt of brakes, bars, and dry sump. The lighter brakes, wheels will be about the same, carbon fiber tunnel will help. The z51 already has all the cooling lines and pumps so that will not be an add.

 

Curb weight is with a full load of fluids, so the ZR1's curb weight of 3333 includes a full tank of gas. You need to fill the C7's Z06 gas tank to 18.5 gallons(another 55 lbs) for a true comparison, so your 3340 lbs would jump to 3395 lbs.

The C6 ZR1 wheels and tires(same size as the C7 Z06) weigh more than the C6 base Z06's wheel/tires and more than the base C6's. I doubt that the C7's base wheels/tires or the C7's Z51 weight the same or less than the C6 Z06 wheels/tires.



Then figure another 75 lbs or more, for the supercharger and the heat exchanger, and plumbing, for the Z06 over the weight of the Z51.

 

What do you think is smack in the middle of the picture? It's the heat shielding cut away showing the carbon tube.

 

I agree that it looks like a spiral wound composite tube, and not a piece of steel tubing, but can you link me to where GM says the Base Z06 is going to have a carbon fiber torque tube?

 

Well thought they said hood was lighter as well and a carbon fiber driveshaft is lighter, auto bit lighter, but seriously you guys are getting all worked up over nothing.
You are basically looking at a zr1 here. This is far above the c6 and its 505 hp so what if the c6 z06 was 3150 or whatever it was. And so what if this car is 300 pounds heavier. Big deal .It only takes 30 hp to make up for 300 pounds more weight .And its not going to make dick all difference in handling or braking or accelerating. This car with its 600 plus hp is going to completely eat up a c6 stock z06.

And on the street this bit heavier matters even less .

My 2007 SL55 has 510 hp stock and is a porker at 4300 pounds. Its still decently quick and you can gain like 100 hp with simple mods like pulley and tune.
With these mods it would be similar in power to weight to my stock 08 z06. Which was a plenty fast street car.

My 2007 911 turbo is around 3400 pounds , very close in weight to the new z06. And it has only 480 hp stock but you can get to around 600 again with simple mods ,exhaust and tuning and it has amazing traction being awd. And its pretty damn quick stock. But this z06 has over 120 more hp and torque than my 911 turbo.

So quit worrying about the new z06 being a bit heavier than the z06 and really its going to be close to zr1 weight. Will say it again this is really not a c7 z06 its a c7 zr1.

And who knows , I can see Gm offering a stripper totally track type one at some point in the model run. Just the same as they now offer the z28 . That one could be quite a bit lighter. Full manual seats, etc. But for the average guy bit heavier z06 is a very reasonable trade off considering the huge power output difference from z06 c6 to c7 z06.

 

They don't talk about it in the Press conference but it was mentioned in the Hot Rod magazine.

I am pretty sure that the engineers sooner or later are going to informed in which areas the Z gain and loss weight like they did it in the Base Stingray with a chart of every pound per item that the base car gain weight.

 

The frame is stiffer in some areas where it needs to be and not on others to save weight... they did say the c7 chassis is 99lbs lighter than the c6z chassis i believe. or was it the regular steel c6 chassis? because the C6Z chassis was 127lbs lighter than the steel frame.

 

Seriously? An extra 300 pounds won't make a difference in the performance of the car?
SMH

 

Hot Rod magazine also said this about the Z06.

"If we had to guess, we’d say the Z06 will sport carbon-ceramic rotors, even more carbon fiber bodywork than the Stingray, and a high-revving naturally-aspirated powerplant that will make us all but forget about the LS7. We’re crossing out fingers for a 396, because if you’re reusing engine designations, L-78 has a nice ring to it."

If they missed the mark that much about the engine and the carbon fiber body panels, what makes you think they have the "inside" info on the torque tube construction?

Oh, and the carbon-ceramic brakes they mention...the base Z06 is fitted with steel rotors. The carbon-ceramic brakes are only available in the top of the line(ie: expensive) Z07 option package, not across the board on every Z06..

 

No, they said the C7 Stingray chassis is 99 pounds lighter than the C6's steel chassis. The C6 Z06 chassis is 136 pounds lighter than the C6's steel chassis(or 37 pounds lighter than the C7 chassis).

 

No it won't for 99% of the average people out there. And even on a road course not much at all. for every 100 lbs you take off a car goes one tenth faster or one tenth slower if you are adding pounds.
For every 100 pounds you add or take away its like 10 hp in actual effect.

I am an old drag racer. My twin turbo trans am is heavy as hell now was around 3500 stock but with the twin turbos, heavy dana 60 rear end ,etc is around 3800 pounds. But the car can easily make over 800 engine hp on low boost. Do you really think that extra weight matters?
It still handles decently and braking is not that much affected by the extra 300 pounds but did upgrade to bigger corvette brakes cheap enough swap.

I also have a stripped down race car my 91 talon but at a certain point makes more sense to simply add more power. If you are going to buy your car to track all the time and not talking drag racing type of tracking then guess 300 pounds might matter to you. If it does then you can get c6 z06 cheap these days I hear. But am 100% sure the new c7 z06 will destroy the old lighter z06 in every category acceleration,handling,braking. 300 pounds is nothing.
But lotus of course and some other companies do go for superlight cars and usually a lot less hp. Each to his own..

Oh and some drag cars run better with more weight in them . Especially in rear of the car.. Like running extra gas for more traction. And some drivers are like 100 or 150 pounds heavier than other drivers.
Seriously my SL55 weights 4300 pounds but it still accelerates and handles amazingly for a heavy pig of a car. And my pricey as hell new 911 turbo weights around same as new z06. And no is complaining about its handling,breaking, acceleration.
They will probably offer a stripper version of the z06.They just did with the z28.

 

I'm curious what drag cars run better with more weight in them?

 

In their latest issue this is what they said and they were spot on:

Got my latest "Hot Rod" magazine today in the mail (0314 issue). Column on page 10 had the following tidbits:

"C7 Z06 chassis is 20% more rigid than the C6 Z06 with the targa top removed and 60% more rigid with the top in place."

"The Z06 will be the only car with more than 600 hp to offer an automatic transmission: the new eight-speed 8L90E."

"The steel torque tube of the Stingray will be replaced with a woven carbon-fiber torque tube in the Z06".

"New Z06 features wider bodywork to cover a 2.2 inch wider track in the front and 3 inch wider track in the rear, with wheel and tire sizes from the C6 ZR1."

"There will be three levels of Z06 available with varying degrees of aerodynamic downforce, the top being called Z07".

"Powered by a supercharged 6.2L direct-injection LT4 V8 that produces an estimated 625 hp and 635 lb-ft of torque using a compact 1.7L supercharger capable of 20,000 rpm and 9.5 psi of boost."