Even lighter rotors??
 

Went to audi yesterday. I've seen a wave cut before on rotors but a new 2014 RS-5 got me thinking. Why not ask Z1 to cut the weight even more on their rotor by doing a wave patten? Less weight doesn't offset the less material loss or something?

I think the wave cut requires additional manufacturing processes which may increase their price over round rotors. From what I've read on Audi's as well, it was a solution to increases their resistance to warping more than a weight saving thing.

Check out this thread on R8 Talk Wave cut Rotors!

Wonder what the cost vs savings lbs vs less material means fast heat up time is.

Why does it look like it's wavy on the outter face and still a full round rotor on the inner face? That's definitely not the shield.

Ceramic brake rotor are the lightest.

Lol, umm yeah. Loan me $10,000

It is the heatshield, I've seen it on a coworkers RS5.

Looks like the shield.

Why not just shave the rotors down if you really want to save weight?

For a machinest to do one set it'd be a lot. Cheaper for someone like Z1 to order like 100 pairs at whatever cost over the original.

Can't see people ordering 100 sets of rotors that don't last as long or cost a few hundred extra dollars.

And if they can turn your brakes for $10, just have them turn them like 5 times, lol.

Wilwood High-Performance Disc Brakes - Hat (Bell) Mount Rotors

Willwood has a few, they call them scalloped rotors that are not safe for street use and mainly used for midget. The biggest they have are 12 in and might be able to be used with the hats for their kits for our cars. But doesn't hurt to call and ask if they would fit the akebonos.

If you have thinner rotors then the pistons in the calipers will have to extend further to push the pads into the rotors. This will make the pedal feel soft.

Yeah, but if we're really trying to save 1lb here and there at whatever expense, I think shaving the rotors is just as viable of an option. I still think its a little bit out there of an idea, and not worth it.


The other thing, if rotors are not CAST with holes or in roughly the same shape as the final shape, the rotors will be week. Z1 and every other company making rotors gets a bad rap because CUSTOMERS order drilled rotors, I doubt they want to deal with the crap PR of having a BUNCH of scalloped rotors cracking to hell.

This would be a neat option to have but it would be more cost effective to go with the Z1 rotor upgrade rather than paying a few hundo more for a pound or two.

... He wants to have this done TO the Z1 set

Lol I don't want to lose thickness. It shouldnt be that much. Someone needs to make the rotor right? Whether its a mold or something, changing it to a new shape/design should be easy.

Why reinvent the wheel lol. If u guys did more research robispec already did everything with the brake man calipers and wavy rotors!

Well there it is. Seems simple. You make a round blank or wavy blank. Price shouldn't differ, it's all one mold per say.

Z1 want to do a group buy with the new design?

I won't buy them, I have my rotors and they are better than good enough for me

It's not the cost of casting. It's the cost of the machining smooth.
And Z1 currently doesn't even cast the holes in the rotors, I'm not banking on them not wanting to going through the bitch of making these.

Oh, and THOSE rotors you posted are shittily designed. Look how much dead space there is between where the pad touches and the center of the bore.

Lol group buy? If anyone Is really serious I will ask and get something going

http://img.tapatalk.com/d/14/03/18/ebeguzas.jpg

He shaved over 60 lbs on the frs http://img.tapatalk.com/d/14/03/18/putupu4y.jpg

Hmmm.. Im always fan of unsprung weight reduction..
Might consider it if the price is within budget. Please check for us the price of front and rear set.

Will do

would do a better job at weight reduction going to the gym and shedding 5-10 pounds, alot lighter on the wallet and won't look as stupid as those ugly things look

I can't get lighter and my weight isn't being spun which is 10 times more important. I'd have to lose 100lbs.

Lol, not 10 times.

But if you want a real improvement, shave your tires. The further out the weight is, the more valuable it is to lose

It's 1.4x for rotors and the like, right? The flywheel is a lot more if my memory hasn't failed me once again.

There is no direct, defined corresponding number between sprung and unsprung weight.

Rotors aren't the best way to shave the MOST MEANINGFUL weight though, tires are, then wheels, then rotors, heading inwards to the hub.

No, but there's a rule of thumb I learned long ago, and promptly forgot. As much of an issue as this car has with brake cooling, I'd be wary of making the heat sink too much smaller.

I believe Rays says 1:5 for wheel weight loss, so I imagine for rotors it's less

Right, that's why I was remembering 1.4x- One pound lost from the rotor is about 1.4 pounds of unsprung weight lost. i.e., it's not as dramatic as we would want to believe. Will you notice a difference between stock and rotors 20 lbs lighter than stock? Absolutely. Will you notice a difference between rotors 20 lbs lighter than stock and rotors 21 lbs lighter than stock? Not a chance in hell.

Rule of thumb is said to be 10 times. Or is it more? A pound off rotation is like 10 off the body? It adds up quick I know that!

I've done tires, I've done wheels, now I am at the rotor yo!

See that's my main question.

But if you have money in hand and want to buy...take my money for the 21lbs :tup:

I'm thinking that's for rotational mass hanging off the crank like a pulley or flywheel. The rotors are nowhere near that much. That would mean that some of these two piece rotors claiming 20 lbs lighter than stock would be the equivalent of 200 lbs off the body, and that's a really bold statement.

True. I was sad when I removed 35 total from the wheels yet I didn't put down 400HP like rule of thumb says, every pound is like 10HP too :roflpuke2:

Right. The 100 lbs=1 tenth in the 1/4 mile would mean you'd pick up two tenths just from a rotor swap, and I just don't see it happening. I wish, that's the best bang for the buck imaginable.