Olly Powers

Hi all,

Recently purchased some second hand Alcon calipers and discs etc.


Discs are fairly worn and I'm wondering what options I have for replacements.
I've heard the Prodrive discs are very expensive.
Does anyone know if the newage Brembo disc will be compatable?
Cheers in advance,
Olly

ozzy

It all depends on the hub measurements for the disk as that's what makes them line-up inside the calipers correctly.

So, a Brembo disk make have all the obvious measurements i.e. thickness, diameter, but it may sit too close or too far out from the wheel hub to sit inside your calipers.

You're right, the original ones are mega-expensive. Contact Ian @ Godspeed in Wales as he could make some alloy bells and give you a nice two-piece disc to replace it.

Stefan

ozzy

PS Ian has made up discs for the Prodrive/Alcon WRC calipers in the past. I just don't know if he's done your ones.

awd wrx

No the STi Brembo discs wont suit as they are 30mm thick , the Alcon ones are 28mm thick , so the brembo disc will not fit inside the Alcon calipers , Godspeed does offer an AP 330mm x 28mm disc and bell to replace the one piece Alcon discs you have , when they wear down you only need the outer part of the disc as you re-use the bells again , not sure of the current cost of them so email Ian - ian@godspeedbrakes.co.uk

Olly Powers

Thanks for that.
So does that mean I could use any 330mm x 28mm disc from the Subaru family?

awd wrx

no , as there isnt a disc that size fitted to a Subaru , only the alcon upgrade you have

Olly Powers

Ahhh right.
So is Godspeed the only other people apart from Prodrive who make discs for the Alcons?
Sorry to keep bugging you.

awd wrx

I'm not sure , they are the only ones I know of

Chelspeed

Sounds like you need to talk to Mark28. See this thread, you may need 8 mates though....

http://bbs.scoobynet.co.uk/showthread.php?t=512109

Chelspeed

> I'm not sure , they are the only ones I know of

But you posted on the other thread so you must have known about BGD? I think you should come clean about your relationship with Godspeed. You seem to be their major supporter and apologist on here. You even tell little white lies on their behalf. Are you a shareholder, Ian's brother or just a satisfied customer?

Just to keep it fair, I'm a many times satisifed, many times customer of BGD over many years and many cars, no other involvement....

Olly Powers

Are these calipers very rare then?
I find it hard to believe only two companies on the planet make discs that fit.
I appreciate that they can be custom made but its not a custom set-up. These came from the manufacturer, so why so few "off the shelf" choices?
Cheers
Olly

stockcar

the original design is copyrighted by Prodrive and are only available from Subaru agents..............plus in the great scheme of things they are a very small use item

have been told today that Subaru have apparently reduced the cost of this replacement, not sure how true that is??

alyn

Olly Powers

Thanks Alyn that would be interesting to know if they have.
Not wanting to stir anything but if Subaru copywrited the design for the disc, shouldn't they be the only ones selling it?
Or are Godspeeds ok because they are of a different design?
If so, whats the other crucial measurement for the disc to make sure it fits the Subaru? Its 330mm x 28mm.........and what else makes it different from another 330mm x 28mm disc?
Do BGD now stock these discs? Or are they still a special order item?
Cheers
Olly

RON

There's far more to it than that Olly, the Godspeed/BGD design is completly different to the standard one, as firstly they are two piece, secondly the 'bell' is alloy.....
The actual size of the disc is merely the start, there's disc/hub offset to consider, hub or bell thickness....stud spacing.... etc etc etc./.......
I 'think' that Ian Godney (godspeed) may have these discs/bells on the shelf..... no promises though..... i don't know his premises intimately...

Olly Powers

Yeah sorry Ron, didn't mean it to sound like I thought there was only one other measurement.
So are these measurements a secret?

S.P.Developments

Two things to be aware of,

1, The discs in the pic are incorrectly fitted, (ie the grove should be trailing)

2, Dont buy discs that have been drilled, unless you are prepared to change them on a very regular basis, (they will crack).

Stay with what you have got, you only get what you pay for..

John

RON

Of course they're not.... you have discs don't you.......!

RON

Very true, but i have a godspeed kit on my car, i've done umpteen trackdays, and lots of fast (ahem) road milage, and have had no issues, and will replace the discs when i need to... with another set!!!

Olly Powers

Don't you start with me!
I'm just curious as to why, if there aren't any issues, hardly anybody makes discs for them?
Do the rally cars use these calipers? If so, do they use the Prodrive one piece discs or 2 piece?

RON

The Rally cars don't use these calipers, they use specific race ones...... i'm pretty sure that the 'Alcon' discs are only used on Subaru's... hence no doubt the rather high price.....testing and development still had to be done....

awd wrx

Chelspeed , whats your problem ? told lies ? WTF's that about , search a bit more on me and you will see I work about 100 yds from Ian , and have fitted a few of his kits , so yes I will praise them to those asking , same as you do the same about BGD , I was answering a question asked.excuse me for forgeting to mention that BG did make a set once for someone

Bigbrakes , you mentioning about getting what you pay for , the discs used in Ian's discs and bells are AP's as he doesn't make a 330mm disc , cant really get a better known name than these.

Olly , Not many offer a copy of this set up as the market isn't big , you will only get the smaller companies offering smaller batches for them , you could ask any engineering company to make you bells to suit some 330mm discs, I guess someone not setup to make them would end up charging more for them

Olly Powers

Ok lets go another way,
If the newage Brembo disc is 30mm instead of the desired 28mm, can it not be machined down?

awd wrx

not really , as a 30mm thick disc will have a minimum thickness of 28mm , which is the thickness they need changing , so cant be done

Olly Powers

So the difference between them is the gap in the middle?

RON

I guess so, but also bear in mind that the Alcon is a completely different caliper, and no doubt a different disc to hub offset aswell....... so not much help really....

RRH

IIRC the Alcon one piece replacement disks are approx £180 a side- whis is not unreasonable in my mind- from subaru dealers. They are readily available.

By comparison 330x28 AP rotors (not including the bells) are circa £170 plus vat a side.

I'm not sure what kind of price Ian charges but they use AP rotors as mentioned earlier. I'm guessing he's making his own bells so they will be excellent as well and made to suit the rotor. As mentioned above avoid drilled rotors as they WILL crack sooner rather than later.

stockcar

spoke to Subaru a couple of days ago and the pukka discs are £250inc./side................