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.

So how come this thread became sprung vs unsprung?

I got forged rays wheels and felt huge improvement in everything I mean EVERYTHING. I will do it again and again without a doubt.

You get what you pay for.

That's where the discussion always goes after we start talking about brake rotors. :rofl2:

i emailed thebrakeman for more clarification on his product and how much it would be for the kit on the ribosec 370z. i will post up his response.

I messaged Robispec hopefully he can chime in or give me additional info.

Is it a rotor or a two piece? I am weirded out now that DE pointed out its like half the pad has nothing to touch.