996+993+964+3.3T+944T brake spec.

palle7688 · 02-21-2004, 06:43 AM

Anybody knows where I can get dimensions of the discs: dia, thickness, height(offset), hub dia. Eks.;'84-'89 Carrera:282*24, height: 26, hub: 155.
And pad dimensions height,wide,thick. Eks.:'85-'88 944T: H*W*T: 67,4*97,8*17,5 mm.
I do know Bill Verburg's brakepage, it's very good, welldone and informative but it's lacking in respect to some of these, (hope he won't be offended by this, that is NOT my intention)

Bill, If I do get some usefull info, will you be interrested in these to update your page, I'll be glad to pass it on to you. I think you've started something good. I've tried to send you a private mail but your inbox is full (guess it's from all us, who relay on your knowledge)

Thanks in advance, bring me some info

palle7688 · 02-24-2004, 12:17 PM

Come on, somebody must know these spec's or know a site.

MuffinMan · 02-24-2004, 12:48 PM

Bill Verburg has all of that information on his site. Do a search on him.

palle7688 · 02-24-2004, 01:49 PM

MuffinMan:
I wished, but not height of disc's and height of pads, at least not all.
What I want to know is how big the svept area is on certain disc is and how deep dish it is.
I need this info because I have these 996 calipers and know they can be installed. For the rear 996 calipers I've found out that they use pads that are 112*73*15,5 (W*H*T) I then need a rotor that has a equal svept area (possibly a 930 rotor but I have not been able to find pad size for it)
For the front it's even worse. Acc. to Bill Verburg it's not possible to install 964 rotors on my car (SC) but I've heard of others that have done that.

Beepbeep, help me here please.

Chris Streit is using 944T rotors but needed to grind of a little on the lower wishbone.

All this is good but if, say, a boxster front rotor will fit without problems why not use it?
Boxster front rotor is 318 mm dia., 28 thick and has a height of 67 mm (here I need dia. at hub)
944T front rotor is 298 mm dia., 28 thick and has a height of 77 mm, hub is 170mm. 170 mm is also the app. dia. of a 911 hub at the wheel/outb. end.
As you can see, you can get a bigger dia. rotor (larger svept area?)same thickness (fits caliper) and possibly you don't need to grind your a-arm.
A little curiosity, a rear '84-'89 Carrera rotor (290*24, 83 height, hub dia. 169) almost fit in front (1-2 mm grinding of the hub outer edge is ok) it would only be a matter of caliper fitment. Therefore a 930 rear rotor might fit also (309*28, height 83, unable to find hub dia.)
Next problem is fitment. Some rotors (older, not so deep)are bolted to rear side of hub while others (newer, deeper) are slid on wheels studs and then screewed to the front side of the hub.
As you can see I've done some research.
If only I knew!!!!!!!!!!!!!!!!!!!!!

beepbeep · 03:29 PM

Hej Palle!

Is this the page you already have URL to?
http://www.pelicanparts.com/MotorCity/wmv/brakes.htm
We used C2 Turbo discs in the front with slightly machined hubs, together with Big Red (993TT) calipers. I believe Bill had some familly issues for a while, that's probably why he isn't reponding right now.

By the way, what's your general idea that you need all the info for? We can probably measure our 930 and 964T rotors if it can help you. I believe it's best to stick to tried-and-true brake conversions on SC's and Carrera's.
In our case it was Big Reds front (relativly cheap, powerfull, easy to fit with adapter) and 930 rear (bolt-on rotors, calipers need some machining but no adapters).

beepbeep · 02-24-2004, 01:58 PM

Turned hubs:

Assembled:

Billet adapters:

beepbeep · 02:19 PM

Front brakes test (left/right calipers are swapped

), click to enlarge:

beepbeep · 02:28 PM

This is how Mattias modded our rear 930 calipers (click on pictures to enlarge), I'm trying to pursuade him to start doing this for money

:

palle7688 · 02-24-2004, 03:14 PM

Beepbeep.
Wow, those are really nice pic's.
I've heard about Bill's father, my condolences,
Yes, that's Bill's URL, have studied it many times, it's good.
It's good to know that it's possible to install 964/965 rotors in front with a little turned of the hub.
996/Boxster S calipers are a modern design, cheaper, easier to get hold of and needs no machining, only adapters.
Rotorwise I would like to have some to fit inside my 16" Fuchs.
Brakes are always in evolution, you have youself been a part of that by installing big reds and 965 rotors.
Pad height I need for not getting pad out over the edge of rotor.
Thanks, Palle

beepbeep · 02:49 PM

P.S. We never assembled front fenders with this brake setup so we really don't know if it rubs or not. We don't even have wheels yet. If Bill say it rubs it probably does, we'll find soon enough. He's brake guru and we're only messing around and hammering square pegs in round holes.

Actually I hope wheels will rub, then I can pursuade Mattias to go for 930 front flares in fibreglass

Also, Big Reds and 964T rotors will (barely) fit in 16-inch wheel, 930 setup will fit in 15-inch wheel.

Kahuna · 02-24-2004, 04:36 PM

Machining the hubs must make some extra room, I have the same Big Red/322mm rotors but in 2 piece floating versions with custom hats, they would never allow 16" Fuchs fitment.

When I was doing my brake upgrade Bill showed me some early and late 930 rotors, the late 930 rotors are the ones that need the wide fenders, Beep Beep seems to be doing the same thing that Timmins does with 993tt floating rotors to fit on a 911.

palle, Bill has posted some engineering drawings with ALL of the dimensions that you asked for, do a search, they are in the archives somewhere.

Bill, said that he would be back tomorrow sometime, I'm sure that he will jump in here.

palle7688 · 02-24-2004, 11:18 PM

Thank you guys, I'll keep up searching.
Beepbeep, Why should your wheels rub? after all you have only added about 4/5 mm to the hub. Perhaps it's save you a spacer.
You must be very exited, I know I would.

palle7688 · 02-25-2004, 01:05 PM

Kahuna: I think you're right. Instant-g and Beepbeep seems likewise.
But would a 996/boxster 318*28 rotor fit the same way?
And would they fit under 16" fuchs?
Very interresting!!
Maybe I should pay my OPC a visit and meassure some rotors.
I'll be back when I know more.

beepbeep · 02-25-2004, 03:00 PM

993TT calipers and 964T rotors fit in 16-inch Design 90 wheel, we tested.

Bill Verburg · Bill Verburg's Garage

Palle I've got the specs for the entire Brembo line. But unfortunately the calipers that Porsche uses are proprietary and not included in my data. There may be some similar ones though.

Again I have to say that I know nothing about the 996 calipers or rotors except the most basic specs.

It's very hard to believe that the Big Red on 322mm rotor will fit in a 16"wheel. I believe Beep but I measure them at ~340mm from one side to the other w/ the caliper extending ~60mm beyond the rotor face.

palle7688 · 02-26-2004, 05:51 AM

Bill, I would love to have those spec's. What I need is: overall dia./thickness, height, hub dia.(int./drum), additionally hole size at hub and size of mounting bolts.
Since I already have calipers, I'm mostly interrested in rotor spec's anyway, I'm a bit selfish here. In the long run I'm thinking about creating a chart like yours.
You can PM to me or post them here, your choice. If it's available online you can PM an URL.
Bill, are you aware of how instant-G, Steve Timmins doing his brake upgrade?

Bill Verburg · Bill Verburg's Garage

Palle there's too much, here are some possible Brembo front rotors for use w/ 996 front calipers

AP and Alcon both have additional choices, check put their sites

For the rears you will likely need to use Carrera rotors like on TREs rear Monoblok kit. In fact if you can get the front figured out TREs rear monoblock kit would be a perfect match.