cfjan

If the ZR-1 rotors are identical to those used in Ferrari, can you re-use the hat and just swap the rotors?!

997gt3north

Better question would be can "we" use the rear zr1 rotor (it is a 380mm) for our front rotors and use the porsche hat ???

There has to be someone on this board that owns / has a friend that owns a zr1 / has a friend who is a GM / Brembo parts person who can check if the ZR1 rear 380mm rotor is exactly the porsche fit - this would be a classic - then we would just need to fine the 350mm rotor off some VW

cfjan

Only way to find out is to compare them side by side.. !

prosper

Even if it is not a perfect fit,
I am sure,
you can always machine a hat that will make it fit...

as long as the thickness of the ZR1 rotor match the thickness of Porsche PCCB caliper,
if you plan to use this ZR1 rotor as replacement caliper for your PCCB setup...

and for people who want to upgrade from the standard steel Porsche brakes,
I am sure it will be cheaper to buy the ZR1 Caliper too... you just need to machined a mounting so the ZR1 caliper
can mount to Porsche mounting...
the only thing you should do is
to repaint the ZR1 caliper so it will not be "obvious"
that you are using a ZR1 caliper hehehe

I don't know about the brake bias (front/rear)
effect on using a ZR1 Front caliper on a combination of Porsche standard rear caliper though...
because ZR1 is Front Engined while 997 is Rear Engine, so the brake bias might be different...
or maybe change the rear Porsche steel set up to
ZR1 rear carbon set up too...

mikymu

Paul has a good suggestion. I will call some Chevy dealer to see if they have the ZR1 rotor for comparison since I have the PCCB off ...

GT3

At least something good came out the ZR1. ...... jk

Subscribed.

mikymu

OK, just called couple Chevy dealer and no one have it in stock. After taking another closer look at the ZR1 rotor vs PCCB I don't think we can make it work. The bobbin bolt pattern on the ZR1 look different front PCCB both 997.1 and .2 version. Rear ZR1 380 mm rotor has 10 bolts compare with front 997.1 and .2 PCCB with 12 bolts etc.

ZR1 rear



More ZR1 rotor pic



997.1 Front PCCB

MarekN

The rotors are not identical, in fact, eventhough Ferrari and Porsche now both buy from the same company - joint venture Brembo SGL, for some reason the surface texture and color of the rotors for Porsche and Ferrari/ZR1 differs. I think that they do this on purpose because it somehow doesn´t feel right for a Ferrari to have the exact same brakes as a Porsche.

It´s all carbon-ceramic, but probably made to look different on purpose.

As for the price, there is only one natural explanation, and that is - we want them bad enough to buy them, for all sorts of reasons. Don´t expect to get a discount neither just because the new company boasts about more economical production. That´s just for making even more money. The cost will come down only after the carbon-ceramics trickle their way to regular sports cars in the M3 range and below that, where there will be much more pressure on the prices from the manufacturers themselves. After that, it will be politically and psychologically impossible to maintain the current price for our cars. On the special cars like the Veyron, the cost will be the same no matter what because that is a different level. But on our level (GT3 and similar), we will have to wait it out for a little bit longer to get a good OEM deal.

_rocket

Thanks for the heads up about chevy prices.

What's the thickness of the zr1 rotors?

I doubt that 10- vs 12-bolt makes any difference strength wise. Just find a competence machinist to make hats for you.

CRex

Can anybody pls comment on the safety of mixing and matching these brake components? I got the impression that the hub, rotor and hub-rotor screws+nuts are pretty specific to each other.

I'm all for smartly reducing our cost of ownership but can't get around the thought of skimming on arguably THE most important part of our cars.. who wants any doubt when driving at 9/10ths on the track?

The Baron

This thread validates my reasoning for ordering my '10RS withoutt PCCB.

Having pounded both steel and PCCB at the limits and driven both on the street, the PCCB are not 3-4 times better than steel as the pricing would have you believe.

PCCB is better for some track applications but steel is FAR better for the street.

NJ-GT

The ZR1 rear rotors and the F430 rear rotors look identical, 10 bolts and large swept area, with a carbon fiber look near the hat.

I will definitely check with a chevy dealer with the rotors in stock, and bring a pair of front and rear Ferrari CCB rotors.

The Porsche PCCB are very different to the Vette/Lambo/Ferrari CCB, both in finish and shape.

prosper

Hi,
as long as you know the spec that is good enough for the raw material for the custom machined hub/hat, it should be safe.
and for the bolt, you can always buy the bolt from Porsche or other brake supplier (brembo/stoptech/ap racing/alcon) from their spare part dept.

and since ZR1 is higher performing car than GT3 RS (on raw straight line speed at least),
plus they weight about the same as GT3 RS (more or less),...
that mean the amount of bolt holes and the diameter of those bolt holes on ZR1 brake rotor
should be plenty enough for Porsche application.

now just in case, you can not use Porsche 997 PCCB Brake CALIPER for this ZR1 rotor,
than you might want to check
whether the brake bias/balance between ZR1 and 997, it might be different,
so you might want to check the piston diameter on each of the 6 piston from the ZR1 front brake caliper
and compare it to the Porsche 6 piston front brake caliper diameter.
if they are the same then the brake bias should be the same.

if they differ a lot than you might need to change the rear caliper of your Porsche to ZR1 caliper to,
so the balance is back...
but then it will have Front and Rear brake bias of a ZR1 which are front engined car...
because for Porsche who have engine in the back,
usually the rear brake bias is stronger compare to the rear brake bias of a front engine car.

Porsche 997 can have stronger rear brake bias/balance because the added weight of a rear engine can help prevent premature rear wheel lock up when braking.

so the best thing for this is for some Brake Vendor or Tuner who know this stuff well and provide ready use ZR1 kit for PCCB application.

but it will be safe and nothing to worry about if the one who do it know their stuff.
and I am sure plenty of people know this stuff well.
They just need to be convinced that they will make money/profit from developing this kit for you guys.

mikymu

Very interesting feedback guys! This is about the most interesting discussion so far for the past couple weeks. Keep it coming since I got nothing else better to do here in California other than building an ark just in case the rain don't stop for another 40 days and nights lol

As far as using the ZR1's ceramic rotor on our GT3/RS ... it's possible but alot of custom work is needed but you still have the rear 350 mm hole to fill. I don't think it's worth the trouble unless you can somehow fit a 390+mm rotor front and 380 mm rear then you will have to use the chrome ZR1 wheels on a GT3 ... oh god!

Here is Pete's custom work on the PCCB to fit his 2000 lbs 912/GT3 hybrid monster: http://www.6speedonline.com/forums/g...0-lbs-gt3.html

prosper

Hi Mikymu,

I am sure some of the Brake Specialist could dismantle the ZR1 caliper,
Powder coat/Paint it to color and emblem similar to stock Porsche and then rebuilt the ZR1 caliper.

In 1993, I buy a Brembo Big Brake kit
for my Lexus GS300 through a speed shop that sourced it from Stillen.
At that time Stillen was the official distributor for Brembo for USA market.

The caliper is the F40 style caliper,
and it came in black color from Brembo.
and since I want it to have the same gold color
as the Brembo Racing Gold Line caliper,
I have the caliper Painted Gold with red Brembo lettering on it. It looks nice and withstand the daily use too. so I am sure you can do the same to the ZR1 caliper.

also at that time, there is no ready to use Big Brake Kit,
and each time people order for their car,
Stillen would have to measure the car and custom made the bracket for the caliper and the hat for the rotors. The hat was floating design too.
Mine was the first Lexus who ever have a Big Brake Brembo Kit installed.
I am using the original Lexus rear disc and caliper,
and have no problem with the brake bias, so Stillen did a good job that time.

and it was a 14inchs rotor or 13.8 inchs (I forget now)... and the Lexus GS 300 stop much much faster than the original factory brake... and the ABS work just fine.
the problem was the rotor start to crack near the crossdrill holes after only about 10,000 km of hard street use, even though the pad still have plenty of material...
but the hat and other custom part are doing just fine...

again I remind you that all the above custom work was done in 1993, and if it can be done at that time,
I am sure it can be done better in year 2010 hehehe...
I spent $5,000 for the front custom made kit
including install and cross drilling the rear oem brake rotor,
and the stainless steel braided line for the rear brake...
but come to think of it, that $5,000 really save my life many times, hahaha
I was young and drive a bit too fast at that time...

by the way Stillen is the distributor for AP Racing brake product now,
and they might be able to custom made a hat for your ZR1 rotor conversion.

Here is the Stillen subsidiary for dealing with AP racing product website :
http://www.brake-pros.com

and here is another website of a seller who use
to sell many Brembo but after some business dispute,
he change to sell Stoptech product.
But he know a lot about Brembo and I think he can service Brembo too, so since ZR1 caliper is made by Brembo,
maybe he can have solution for you:
http://www.zeckhausen.com/
He is a great guy, and I communicate with him several time by e-mail in the past.

and mikymu,
talk about rain and flood on Southern California,...
I just open Jalopnik.com and they have story on this Rain and flooding,
and on the main pictures they have a pictures of Lexus GS300 on flooded Freeway
(I think this is the 10East going from Freeway 1 (PCH right)) ?
What a coincidence, because I just talk about my old Lexus GS300 on this post few minutes ago... and you just talk about
rain, and there is a picture combining your story and my memory hahaha
below is the picture:


I remember this kind of flooding in LA also happened in 1994 or 1995 while I was studying at USC...
do you remember that one ?