So far, all the pics that I've seen that show the rotors, showed cross drilled rotors.

Correct me if I'm wrong, but the C5 Z06 still used solid rotors?

You're right. C5 used solid rotors.

"Everybody is doing it, so why don't we" seems to be the reason behind the new Z06 and the "pretty" rotors.

Whatever. If you can afford to buy a new ZO6, you can probably afford some new rotors. Maybe it'll help them sell a few more cars.

Good point.

Yeah, but it's still ghey.

Good point.....

It's just cheap to sell out to stuff like that.

The base model C6 with the Z51??? package has cross drilled rotors. We just received one at work a few weeks ago.

Not actually cross drilled by casted it appears.

I don't see why you guys are SO against cross drilling.

There is no Selling out going on here. I guess porsche and Ferrari "sold out" eh?

Louis, almost EVERY business out there technically "sells out". That's the whole point, give the customer what they want. Don't believe for one second that there is a single automobile manufacturer out there that hasn't made a change to their models lines not because it truly made it a better car, but because it made the customer perceive it as a better car.

In any type of consumer environment, regardless what level you're selling at, perception is reality. Simple as that.

The rotors on the new Z and the Z51 C6 look like quality pieces. They have the same fit and finish as a brembo piece. I know a few delphi engineers that worked on the brake system for these cars and if there was a compromise, it would not have been put on the car.

I will let you know how they hold up in testing

Porsche and Ferrari use rotors that have the holes cast into them when they are made, not cross drilled later. I can't speak to the new C6Z51/Z06 rotors on that. I do know, that even Porsche for a while used blank rotors on it's top line performance cars. My 88 944 Turbo S has blank rotors, while the base 944 Turbos came with "cross drilled" (cast) rotors. The reason? Porsche knew way back then that rotors with holes in them are really just for appearance. The only reason most Porsches and Ferraris today come with rotors with "cross drilled" holes is because the customer expects it, not because of any performance gains. Unfortunately it looks like GM is taking the same route. Personally, if they are going to use "cross drilled" rotors, I would prefer to see them on the base C6 and use "blank" rotors on the performance models (Z51/Z06).

We've been trying very hard to prove that statement to be correct. So far, no luck. It is looking more and more like a myth/marketing hype.

http://corner-carvers.com/forums/showthrea...ead.php?t=21273

I for one am willing to consider this is a different class of rotor than the usual dearth that has holes in it available for our cars.

Ok, let me solve the Porsche rotor question once and for all. I just got off the phone with Tom Charlesworth, who is one of the most recognised Porsche mechanics in the US (as well as being on the PCA tech commity and answering technical support for Porsche North America on 924/944/968 cars). He is Porsche trained and has been involved with Porsche racing efforst, so I think we can trust his answer on this.
His statement is:
FACTORY Porsche cross drilled rotors have pilot holes cast in, but then are machined to finish them off after casting.

Kevin, I'll let you post this on to cornercarvers as I don't have an account there.

Got pics?

Ditto. Until someone finds some pictures of the molds which clearly show pins (for casting the pilot hole) then its still unproven.

...who REALLY cares????

Porsche brakes are pretty much PROVEN day in/day out....and a few weekends a year on my car in SCCA competition...

I think it is safe to assume that for the Z06, GM did the brakes "right".....time will tell...

On the other hand..
How about pics of the machine used to drill the rotors after casting? :leaving:

Just playing devils advocate...

...anybody who has picked up a Porsche rotor will THANK GOD that they drilled the damn things.....my car would weigh 500 lbs LESS without them boat anchors...

Funny thing my buddy noticed about his Z51 C6 is that he has the exact same "cross-drilled" rotor on both sides of his car, meaning that both the right and left rotor have the same part number. The problem is that they look to be directional fin-wise. He thought Chevy had put the wrong rotor on one side but he verifed with the parts department that indeed the right and left, even though they look to have directional fins, both are listed under the same part number.

And yet I've apparently glowed my boat anchors red. I'm not so sure how much lighter I'd want them. The hat on those things isn't where most of the weight is.

Louis ... check your PMs and answer my damn questions ...











:leaving:

....MUCH lighter......PLEASE!

....didn't know Porsche cross drilled the hats....mine aren't

No, no pics, but personally I'll take Tom's word considering the experience and training he has on Porsche cars. I think he probably knows what he's talking about if Porsche uses him as a technical resource on their own cars.

That being said, I have to agree. What difference does it really make. Porsche rotors are track proven to be way better than just about anything else out there. My rotors off my 944 Turbo (16" wheels) are way heavier than the rotors that were on my Z06.

I think there is a general assumption that an Aimco rotor from Autozone has the same metallugy that a Brembo rotor would have.

I doubt it's the case at all ....

From what I've seen on all the GT3R Porsche's and the ALMS things that run...the first thing they do is throw the stock Porsche rotors away. Fine for a hi-po street car....there are better rotors/hats out there for race cars.

There certainly are. The Brembo racing replacements for that application look very nice indeed:




Those teams probably don't mind the nearly $800 per rotor as much as I would though.

That's enough to make me want to find a set of calipers to go with them and drag it all home. Besides, I just got practice installing a set of Porsche brakes this weekend.

....your KILLING me Jon....I LOVE THOSE THINGS...

:drool:

I never meant to infer that the new Z06 rotors would be inferior pieces due to being cross-drilled, but it's generally accepted that the cross-drilling is unnecessary. Just eliminates a potential future upgrade path, as this pretty much means blank Z06 rotors are going to be non-existant, and I'm just not going to pay more money for a treatment that doesn't add any value.

...well, if you want C6 Z06 rotors...it looks like YOU WILL...

actually, $775 each (including hat + rotor)
but then to replace the rotor, it's only $300 each... not too shabby.

Now Now...there are a couple other brake companies out there......AP, Alcon, Brembo, and lets not forget the guys at StopTech. And you can pick up rotors that are just as good as the brembo's for less than 1/2 that cost...just gotta shop around.

...if you got some sources up your sleeve....DO tell!