You can change the style the forum displays by selecting your preferred style at the bottom left of the site.
We have made an enhancement so that old threads should now link from search results to the correct thread. This is not yet in place for single post links
Here are some crappy phone pics I just took of my 996 calieprs and 314mm brembo dics.
The annulus of the disc is about 60mm, it looks like you could loose 10mm off the inner edge of the pad?
Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
In simplified form, I think Stu has hit the nail on the head: Just fit the biggest you can under the wheels you have!
It does look like DBA make a two piece disc for the A8. Doubt whether its cheap, but might be worth enquiring. Another rule is don't make what already exists!
28mm disc, 40 & 44 mm pistons, 50mm high pad and they are cheap. Trailing orientation so no swapping pipes around etc. I can send or post a bracket sketch if you know the disc diameter.
great info dude!
Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
Here are some crappy phone pics I just took of my 996 calieprs and 314mm brembo dics.
The annulus of the disc is about 60mm, it looks like you could loose 10mm off the inner edge of the pad?
So you could. Although you would lose a good chunk of pad area. Maybe not a problem if you're only carrying around a 7A, but I wouldn't want to with an I5T.
I also wouldn't fancy taking to the Bridgeport every time I wanted to change pads, which would also be more frequent with less pad area.
To be honest if you want affordability, availability and durability use all OE components. If you want less unsprung weight, go for all aftermarket components. There would be a substantial weight saving and as its all engineered to work together, no compatability problems. After all we are talking about brakes here!
As a case in point, those Alcon discs are I believe very hard to source and expensive. Even with AP stuff, you will be paying over £200 a replacement disc.
its looking that way, I wanted the best of both world, just would be nice to have a setup for track that was quick & easy to swap so as not to trash the everyday kit, can't have it all I guess.
Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
@4wheeldrifter....£200 replacement disc eh Stu, if only!!!... :mischeif:
£200 a disk? Yeah. If only, eh? I would be happy with a set of pads for that.
I thought about having a summer brake setup, then a winter set that I could squeeze under the 17"s, but decided to try to do one set that did both. It has not been easy, or cheap.
Oh by the way, those BMW calipers use a much smaller pad than the Porsche caliper and they are lug mounted. The pads are the same size as the Seat Leon Cupra R.
Before anyone gets worried that IS a AP caliper, were currently designing a 330mm kit for another german vehicle using these after some good reports from other users.
Disc wise the Powervane rotors are ok but there are quite a lot of options out there, obviously a pair of 330 x 28 AP rotors are something like £500 rrp so it depends what your budget is, I use 330 x 36mm floating rotors but I'm probably going to get the calipers machined and drop back to a 32mm as their more common and affordable.
As mentioned though brakes are expensive but they transform a car
Its not too hard to machine your own bells from a set of universal bells from a company like Hi Spec. I got mine done this way, they machined them with a 15mm offset. I then machined the centre and the bolt holes. They are 7mm thick. 10mm in my opinion is way overkill!
If you are using a disc around 330mm you want to get bells with a 203 pcd. That covers a large range of AP discs around that size so you could drop down to smaller discs to go under 16" wheels if you wanted.
As for the pads being large on the porsche calipers a grinder flap wheel fast sorts that. You only need to do the one side, the back can over hang.
Oh by the way, those BMW calipers use a much smaller pad than the Porsche caliper and they are lug mounted. The pads are the same size as the Seat Leon Cupra R.
They are relatively easy to mount once the disc diameter is over 300mm .
Reducing the size of the pad isn't a bad thing, it doesn't change the brake performance but will shorten the interval between pad changes.
I don't have the cupra R on my list but I do have:
honda integra dc5,
BMW E38,
BMW E65,
BMW E31,
Ferrari F550,
Fiat Coupe,
Maserati 3200GT,
Nissan Skyline R33 GTR/ R34.
Pagid Part Number T5091
CL Part Number 4061
Ferodo Part Number FDS 998
Mintex Part Number MDB 1752
Brembo Part Number 07.8301.66
Its not too hard to machine your own bells from a set of universal bells from a company like Hi Spec. I got mine done this way, they machined them with a 15mm offset. I then machined the centre and the bolt holes. They are 7mm thick. 10mm in my opinion is way overkill!
If you are using a disc around 330mm you want to get bells with a 203 pcd. That covers a large range of AP discs around that size so you could drop down to smaller discs to go under 16" wheels if you wanted.
As for the pads being large on the porsche calipers a grinder flap wheel fast sorts that. You only need to do the one side, the back can over hang.
If you are grinding the pads back because of a small annulus, then you will probably have to watch the clearance between the pad back-plate and the bell-rotor fasteners.
So you would effectively only be able to use the pad until you have the depth of the bells plus bolt heads left, giving you only a few mm of pad use. That could get expensive in the long run, not to mention tedious having to change pads regularly.
But you are right, pad material does not take much effort to remove.
Also reducing the pad contact and frictional area is not really ideal. It's all about friction and heat transfer.
I've weighed up a lot of options before ending up with the brakes I have. I have also made up a few plywood/chipboard mock disks and rotors along the way, to assess what will fit and what will not.
I've looked through many options in the Alcon, AP Racing and Brembo catalogues, and to use a Brembo caliper with a two piece bell and rotor you really need a Brembo disk.
I can however recommend the AP Racing CP5200 caliper shown above. I have a pair of those that have done many years of miles and service, with the only fault being the squeals when combined with Ferodo DS2500s and brake dust.
I have also found a advantage to calipers being bolted together, rather than being monoblocks.
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Although you would lose a good chunk of pad area. Maybe not a problem if you're only carrying around a 7A, but I wouldn't want to with an I5T.
:mischeif: 
.
Comment