Z06Norway

Too all tuners, can someone post the weight of the steel torque tube ?

And is it possible to stick a ZR1 torque tube in there too save weight ?


I dont care about V4


tia


Rune

JoesC5

Since you are posting in the Z06 section, I assume you are referring to the Z06's torque tube. The Z06 has the lightest torque tube as it has aluminum end bells and a carbon fiber center tube(6" dia x ~6' long).

No advantage in changing over to an all aluminum torque tube.

Z06Norway

yes i posted here since all articles say C7 Z06 has a steel torque tube and even if shaft is CF it will not offset the steel.
And you can also have a ZR1 torque tube or C6 Z06 torque tube with CF drive shaft ...

So i want more detail and info from tuners and builders that will take or has taken C7 Z06 apart and can measure and weigh the steel Torque tube

Steve Snake Driver

The Stingray torque tube weighs 13.2 more than the Z06 torque tube.

http://www.debotech.com/news/Corvette-Z06--SEMA/61752

3 Z06ZR1

What? Stock Z06 torgue tube is CF!

PRE-Z06

https://www.corvetteforum.com/forums/c7-z06-discussion/3585156-torque-tube-and-cv-joints-c7-z51-vs-c7-z06.html

The pic posted in that link only makes the carbon fiber section look like the shell (ie torque tube) and the not the actual shaft as I thought that had to be steel to cut down on nvh of 4 cylinder mode. Don't believe the c6 and c7 will interchange as the wheelbase is different between the two, though I know the tr-6070 is longer so that might make up the difference.

https://www.corvetteforum.com/forums/c6-tech-performance/3466115-c7-7-speed-transmission-in-a-c5-or-c6.html

On another note, you can save a lot of rotational weight by ditching the dual mass flywheel as well, hope that helps.

JoesC5

Both the torque tube and the prop shaft are made of carbon fiber on the C7 Z06 and the carbon fiber torque tube (with aluminum bell housings) is lighter than the steel torque used in the Base C7.

I don't understand why you keep insisting that the C7 Z06 has a steel torque tube. It doesn't. That's a fact.

PRE-Z06

Correct me if I'm wrong by all means, but the cutaway picture in the link I posted doesn't so the shaft as being carbon fiber and the c7 "torque tube" is not carbon fiber at all so I have to assume that is indeed a c7z06 prop shaft??? Please help us understand where you are getting you're info from that explains it better, thanks.

JoesC5

Plenty of sources that say the Z06 torque tube is made of carbon fiber....including Tadge(I can't locate the video at the moment)....

"The Z06 swaps the base Stingray's steel torque tube for one made entirely of carbon fiber. This is a tricky bit of engineering. Unlike a traditional drive shaft, which only has to contend with torsional stresses, the Corvette's torque tube deals with forces in every direction. When the driver launches the car, the tube takes the stress of trying to pick up the nose by the engine.

The company ships American carbon fiber to a supplier in Australia, which constructs the 6.5-foot long tube and then ships it to Bowling Green, Kentucky for assembly. The new design is lighter and stiffer than the steel in the base car"

http://www.roadandtrack.com/new-cars...-stingray-z06/

and.........

"The hidden carbon-fiber torque tube

To make cylinder deactivation work on the Stingray, it needed a stiffer torque tube than the aluminum piece used on the C6. They went with steel, which has
three times the stiffness but weighs more. That wouldn't do for the Z06, so it gets a new carbon piece with aluminum bells on either end. "It looks really
cool, and no one will ever see it," says Juechter."

http://www.roadandtrack.com/car-show...#ixzz2qPX7e562

Z06Norway

Thanks, i didn't know that.
Now i know there is no weight savings on TQ tube

I was sure the Tube itself was steel and only shaft inside was made in CF instead of aluminium

Thanks again


Rune

JoesC5

Found the video.....


go to 2:20 where Tadge talks about the torque tube.

And Tadge misspoke a little about the C7 Z06 being the first to have a carbon fiber torque tube. The 2014 Mercedes SLS AMG Black series had a carbon fiber torque tube. I believe that was the first carbon fiber torque tube in the automotive industry.

Higgs Boson

So just to be clear:
The C7 Stingray torque tube is steel and the driveshaft is aluminum
The C7Z is carbon fiber for both?

Does anyone have the part numbers for the C7Z TT and DS?

JoesC5

Yes, both the torque tube and the prop shaft(driveshaft) are made of carbon fiber on the Z06 and a steel torque tube and a prop shaft of aluminum on the Stingray. The torque tube on the Z06; the 6" diameter center section(wound tube) is made of carbon fiber and the end bells on each end of the carbon fiber tube are cast aluminum.

PRE-Z06

In that video he states that it uses a carbon fiber torque tube and that was more difficult to design than the carbon fiber prop shaft used by aftermarket companies. My vision is pretty good and unless the pic is misrepresented, the prop shaft is not carbon fiber in the link I posted above and below...

https://www.corvetteforum.com/forums/c7-z06-discussion/3585156-torque-tube-and-cv-joints-c7-z51-vs-c7-z06.html

Are we looking at the same thing?

Obviously the C7 non z06 uses a steel torque tube, so it's not a pic of it by mistake.

JoesC5

I remember seeing/reading somewhere that the propshaft was made of carbon fiber, but can't locate that source presently. GM did file for a patent on March 21, 2012(at the same time they filed a patent on the carbon fiber torque tube) titled "Propshaft and propshaft assemblies and methods for fabricating propshafts" and it describes a "propshaft comprised of a fiber reinforced composite tube and a splined female insert"

Of course, the filing of a patent doesn't mean that the carbon fiber propshaft ever made it into production

CPhelps

Looks to me like in the first picture, the glossy portion is the inner prop shaft, while the outer portion with the more visible weave is the torque tube? Then the second pictures shows the aluminum end bells to mate w/ the rest of the assy?

FiremanC7

I looked at the picture you referenced and saw a rough weave CF Torque Tube and a smooth wrap CF Propshaft. In fact it looks identical to the CF barrel on one of my AR's.

BobD

PRE-Z06

The 2nd picture, not the 1st is what I was referring to as it shows the prop shaft and it appears to be metallic.

1st picture in post 36 below, may show a break down better...aftermarket carbon fiber prop shaft on the far left and stock in middle, with torque tube on the right.

http://www.stingrayforums.com/forum/stingray-corvette-problems-issues/6162-2014-corvette-needs-torque-tube-replaced-but-dealer-cannot-get-one-anywhere-4.html