156 Brembo upgrade bracket interest thread. - Alfa Romeo Forum
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Well Happy 156 Brembo upgrade bracket interest thread.

I was wondering how many people would be interested in a bracket which allows the bolt on fitment of 166 4 pot Brembo calipers. I have a source who can produce the brackets and a one off build would be 100 euros (£85) but a run of several sets would bring down production and transport costs. They are made of an alloy which is stronger and lighter than steel. This is a big brake conversion for £100-150 for the calipers, discs hoses and pads can be had for less than £100. All in you're looking at £300 for kit which would cost you three times that from a tuning shop.

More pictures here:
https://docs.google.com/folder/d/0B_...xMdUtVUWs/edit

Info on materials here:
ASM Material Data Sheet

https://www.alfaowner.com/Forum/alfa-...ml#post5266304

Regards,

Nick

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What disc would you intend to use with that bracket? Looks quite a small bracket so presumably early 156 GTA discs 305x28mm?

This needs to use an easily available off-the-shelf disc otherwise it will get expensive. I believe the later GTA discs 330x32mm would be out of the question if you used the 166 caliper as the discs are too thick? The original 166 discs are 310x28mm but they wouldn't bolt onto a 156/147 hub because the PCD is different.
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(Post Link) post #3 of 576 Old 25-03-13 Thread Starter
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Yeah, the garage who fitted them suggested drilling out the 166 discs :S so 305 GTA discs it is!

Nick
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I'd be interested in these am I right (after reading the original thread) that this is also possible on the GT
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Quote:
Originally Posted by AutobotVanguard View Post
Yeah, the garage who fitted them suggested drilling out the 166 discs :S so 305 GTA discs it is!

Nick
Well you could drill out a 166 disc back to 5x98 PCD. Thing is you need to be 100% what route you're going down before you get the brackets made up as the bracket determines how far out the caliper sits, brackets for the 305x28mm disc will be approx 2.5mm smaller than brackets designed to hold the caliper further out for 166 310x28mm discs.

I think going for 305mm discs is the better idea so long as there is enough friction surface on the disc so it sweeps all of the pad surface (this needs checking). Don't forget the 166 calipers are from the Brembo large family of calipers rather than small, and take the same pad as the 330 calipers on later GTAs and the GT 3.2.

If the price is right I'll have a pair of brackets as 166 calipers are fairly plentiful.
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Drilling 166 310x28 discs instead of using off-the-shelf GTV/GTA 305x28 discs is a daft idea!
Make them to use a COMPLETELY STANDARD disc.
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As said if it was going to use a 305mm GTA disc I would be interested otherwise would be a pain down the line to change discs.
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Quote:
Originally Posted by David C View Post
Drilling 166 310x28 discs instead of using off-the-shelf GTV/GTA 305x28 discs is a daft idea!
Drilling discs shouldn't be done if there is an alternative. 330x32mm discs are out because the calipers is too narrow. That only leaves 305x28mm discs, or drilling. Do you know if the diameter of the friction surface part of a 305x28mm disc is at least equal to the height of the brake pad for a large Brembo caliper? Because if its not then you couldn't really use 305x28mm discs.
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I think going for 305mm discs is the better idea so long as there is enough friction surface on the disc so it sweeps all of the pad surface (this needs checking).
They don't. The pad overlaps the disc by a few mm.
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They don't. The pad overlaps the disc by a few mm.
I'm not sure I'd be too keen on that, as the disc will effectively be cutting into the pad rather than wearing down the pad, even if its only a few mm from its edge anyway. I suppose on the positive side you won't get lipped discs when they are halfway worn.
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Can a spacer not be added to the caliper to widen it by the 4mm? sure I saw that somewhere, although obviously that would cost more.
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Originally Posted by edraven71 View Post
Can a spacer not be added to the caliper to widen it by the 4mm? sure I saw that somewhere, although obviously that would cost more.
Yeah you could space out the caliper, but you'd also need to remake the external balancing pipes that pass fluid around to the other half of the caliper as well as buying new pad pins which are 4mm longer. Then you could use a bigger bracket and use 330x32mm 5x98 PCD discs.

Or maybe use 159 330x28mm discs, no need to space out the caliper but they'd need re-drilling to 5x98 PCD.. Hmm.
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Originally Posted by Pud237 View Post
I'm not sure I'd be too keen on that, as the disc will effectively be cutting into the pad rather than wearing down the pad, even if its only a few mm from its edge anyway. I suppose on the positive side you won't get lipped discs when they are halfway worn.
I'm currently in the testing phase on that
My pads are only now starting to go around the side of the disc. One other thing to consider about this is the thickness of the pads vs thickness of the disc.
If the thickness of the unworn disc = 2 x the thickness of one new pad or less, they will have to be changed a fair while before they have worn out, otherwise the pads will have contact with each other, rather than on the disc.

I'm fairly sure new pads have 14mm braking material, that is 28mm overall. That is equal to the new disc, which will obviously decrease as the brakes are used. They would have to be changed at around 5mm thickness to avoid contact with each other, which could have exceedingly dire consequences.

I used part worn pads this time, so I'm unable to test this theory, but even with this set, I'll change at around 5mm.


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Hi
Have just read through this thread, Interested in what is being discussed and offered.

I've also been looking for someone who can make the Brackets for the Alfa Radial Fitting Brembo Brakes-as used on the top line versions on the 159 & Brera with the 330x32mm discs (5x110 PCD).
I've got the brakes and I'd like to Upgrade my 159 SW 1.9jtdm to the bigger 330x32mm Standard Off the Shelf Discs & Pad Parts- but need to find somebody who knows what they are doing in Manufacturing the Adapter Brackets.
The Calipers use a 130mm Radial Mount with a 50mm Offset- while the Lug Fitting which is 90*degrees to the Hubs is spaced at 150mm.

Would be good to hear if your supplier can help

david44

(PS... I think Not using Off the Shelf Parts- redrilling Discs is goona be very difficult to explain the Insurance Companies when you tell them of the Modifications you've made. They are just gonna say NO....
If you have an accident with these Redrilled Items, they will say the disc brakes are untested and are not certificated and are not fit for purpose...and will not payout.)

Last edited by david44; 25-03-13 at 23:16.
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This whole debate sums up the reason why 166 calipers don't make a lot of money second hand
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Quote:
Originally Posted by david44 View Post
Hi
Have just read through this thread, Interested in what is being discussed and offered.

I've also been looking for someone who can make the Brackets for the Alfa Radial Fitting Brembo Brakes-as used on the top line versions on the 159 & Brera with the 330x32mm discs (5x110 PCD).
I've got the brakes and I'd like to Upgrade my 159 SW 1.9jtdm to the bigger 330x32mm Standard discs- but need to find somebody who knows what they are doing in Manufacturing the Adapter Brackets
The Calipers use a 130mm Radial Mount with a 50mm Offset- while the Lug Fitting which is 90*degrees to the Hubs is spaced at 150mm.

Would be good to hear if your supplier can help

david44
What calipers have you got? 159/Brera calipers designed for 330mm discs are not the same as the GTA/GT3.2 calipers for 330mm discs. The 159/Brera calipers are narrower and accept a 330x28mm disc, the GTA/GT3.2 calipers take a 330x32mm disc.

Off the shelf disc options are 330x28mm in 5x110 PCD (159/Brera) and 330x32mm in 5x98 PCD (156/147/GT etc)
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I believe they were originally from a Brera- Silver with the Alfa Logo.
Looking for Brackets to be made similar to the attached pics.

pb3.jpg

pic22.jpg.
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Ah OK. They do sound like Brera calipers. You will need to use 330x28mm discs with them, which are the correct PCD for your hubs anyway.

I don't have a source for the brackets but it shouldn't be too difficult. You could also use original brackets from Alfa and 2.4 JTDm front hub carriers I believe.
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Thanks for that
I've had a good look at the Eper Parts Bin- and in addition spoken with a few technician guys in the know.
The 2.4 jtdm & 3.2 V6- have a different Hub Assembly to the 1.9 & 2.2 etc. The Calipers bolt directly onto the Hubs.

Hence the idea of having Brackets made, rather than the expense of the new Hubs with different Diameter Drive Shafts.

Look forward to hearing your thoughts- Cheers

david44
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Do the hubs take different diameter driveshafts? Its not something I've looked into before on the 159s so I don't know from the top of my head. If they do, then yes it means going to the expense of also changing the wheel bearings.
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Quote:
Originally Posted by david44 View Post
I believe they were originally from a Brera- Silver with the Alfa Logo.
Looking for Brackets to be made similar to the attached pics.

Attachment 165309

Attachment 165310.
In the first picture that is NOT a 159 caliper, but a GT 3.2 caliper. How do you intend to use the 159 discs with those calipers ? The 159 discs are 28mm thick and the calipers take 32mm thick discs. You would need thicker pads.
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Originally Posted by Ataemonus View Post
In the first picture that is NOT a 159 caliper, but a GT 3.2 caliper. How do you intend to use the 159 discs with those calipers ? The 159 discs are 28mm thick and the calipers take 32mm thick discs. You would need thicker pads.
You are right, the pictured caliper is indeed GT or GTA 330mm caliper

However why would he need thicker pads? Do pads not wear out and get thinner anyway? The calipers should work fine with standard pads or better still GT/GTA pads with a 28mm disc.

If it was reversed however, using a GTA 330mm disc on a 159/Brera Brembo caliper made for a 28mm thick disc, then there would be issues as the pad would be too thick....

Last edited by Cuore Sportivo; 26-03-13 at 03:47. Reason: edited 280mm to 28mm!
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The discs are NOT 280mm thick, that would be huge, they are 28mm.
For the Brembo B/H family calipers (the 330 Alfa ones are part of this caliper family), discs thickness of a new disc should be 30mm or 32mm, thus the minimum worn thickness of a disc is 28mm. Using a 28mm thick discs to begin with, making it 26mm thick when worn out, will result in pistons sticking out too much, too much pedal travel, etc.
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Originally Posted by Ataemonus View Post
The discs are NOT 280mm thick, that would be huge, they are 28mm.
For the Brembo B/H family calipers (the 330 Alfa ones are part of this caliper family), discs thickness of a new disc should be 30mm or 32mm, thus the minimum worn thickness of a disc is 28mm. Using a 28mm thick discs to begin with, making it 26mm thick when worn out, will result in pistons sticking out too much, too much pedal travel, etc.
Yes I meant 28mm! lol and now edited!
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