BBK Idea

[adamazing]

I might have stumbled on another viable BBK build, and I'm not sure if it's been discussed before.


I discovered that RS5 "Audi Ceramic" Calipers are half the price of the standard 8 Pistson RS Calipers, while also accepting larger rotors (380mm vs 365mm). So I did some parts shopping, and to me, it looks like you can piece together a 380mm 6-Piston RS BBK for right under $2,000 (excluding tax and pads).






RS Ceramic Caliper (Right)
Part Number: 8T0615108B
https://www.ecstuning.com/b-genuine-...ht/8t0615108b/

RS Ceramic Caliper (Left)
Part Number: 8T0615107B
https://www.ecstuning.com/b-genuine-...ft/8t0615107b/

ECS Stage 4 Upgrade Rotors (380x34) and Caliper Bracket
ECS Kit Number: ES#3221135
https://www.ecstuning.com/b-ecs-part...883ecs01ktkt4/


I'm not even sure the caliper bracket would be needed since the Ceramic calipers are designed to fit 380x34 Carbon Ceramic rotors. They should just bolt up to the hub since the regular RS5 calipers do, no?

Anyone have any idea why this wouldnt work? (Assuming you have wheel clearance)

[johnnySV]

killer concept, subscribed to see the results!


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[audisean1]

Great find.
Check out audiusaparts.com for even better prices.

http://www.audiusaparts.com/oe-audi/8t0615108b

$389.22


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[LINDW4LL]

Anyone have any idea why this wouldnt work? (Assuming you have wheel clearance)

Nice idea, OP. A fun fact- the ceramic calipers are actually the same as Porsche 19Zs (though the pistons appear to be a different material, I assume to accommodate the higher temps ceramic rotors see- but the same casting. A few companies make BBKs using the 19Z calipers (ECS & JHM). The part you linked from ECS may not work as those brackets are marketed as being for the RS5 8-pistons, not the 19Z. It's possible that the same brackets are used for both calipers, but I'm not certain whether that's the case. Nonetheless, they do offer a specific kit for 19Z brackets and 380mm rotors here.

https://www.ecstuning.com/b-ecs-part...03755ecs01akt/

[adamazing]

Nice idea, OP. A fun fact- the ceramic calipers are actually the same as Porsche 19Zs (though the pistons appear to be a different material, I assume to accommodate the higher temps ceramic rotors see- but the same casting.

A few companies make BBKs using the 19Z calipers (ECS & JHM). The part you linked from ECS won't work as those brackets are for the RS5 8-pistons, not the 19Z. However they do offer what you're looking for!! Here is the correct link- this is all you'd need to get these calipers working.

https://www.ecstuning.com/b-ecs-part...03755ecs01akt/

I dont even think the brackets would be needed. The brackets in that link are only there to push standard RS5 calipers outward an additional 15mm to fit over 380mm rotors.

The standard RS5 Calipers bolt right up to our hubs without a bracket and fit 365mm rotors. The Ceramic Calipers already fit 380mm rotors without any brackets on the RS5, so deductive logic says they should have the same mounting points and not require any brackets.

[LINDW4LL]

I dont even think the brackets would be needed. The brackets in that link are only there to push standard RS5 calipers outward an additional 15mm to fit over 380mm rotors.

The standard RS5 Calipers bolt right up to our hubs without a bracket and fit 365mm rotors. The Ceramic Calipers already fit 380mm rotors without any brackets on the RS5, so deductive logic says they should have the same mounting points and not require any brackets.

Great point. The only issue would be if the ceramic rotors have a different offset, however I'd be willing to bet that is not the case and they will work with the stock bracket.

[adamazing]

Great point. The only issue would be if the ceramic rotors have a different offset, however I'd be willing to bet that is not the case and they will work with the stock bracket.

True, same rotor specs (380x34) but the hats might increase or decrease offset.

[adamazing]

Great find.
Check out audiusaparts.com for even better prices.

http://www.audiusaparts.com/oe-audi/8t0615108b

$389.22


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That was actually where I first found them. I cross referenced on ECS and used that link for demonstrative purposes since they have pretty pictures, lol.

[adamazing]

Well, it's a moot discussion for me. I just went out and measured clearance in my wheels and there's no way I can fit these. I'd have to upgrade to 20" wheels or move to a 19" cast/rotary forged wheel.

[yjypm]

I have the rs5 380mm bbk. The cost of pads is killing me (8 pcs of pads to change). The RS 8 pot calipers are also heavy as hell.
I would love to get these calipers if they fit normal 380mm steel rotors.
I would hope the ceramic rotor hat has the same offset as a normal steel rotor hat, but I am not sure if anyone is willing to test it.
If anyone is in LA area and has these calipers I have a pair of 380mm rs5 rotors for you to borrow: just help you test if they fit.

[LINDW4LL]

I have the rs5 380mm bbk. The cost of pads is killing me (8 pcs of pads to change). The RS 8 pot calipers are also heavy as hell.
I would love to get these calipers if they fit normal 380mm steel rotors.
I would hope the ceramic rotor hat has the same offset as a normal steel rotor hat, but I am not sure if anyone is willing to test it.
If anyone is in LA area and has these calipers I have a pair of 380mm rs5 rotors for you to borrow: just help you test if they fit.

How much would you save on pads?

The RS5 calipers are about ~ 11.5 lbs if I recall correctly. My smaller Cayenne 18Zs (relative to the ceramics/19Z) weigh ~ 10 lb. Both these and the standard RS5 8-pots are aluminum monoblock calipers so I'd be surprised if they're significantly lighter.

[Audi 4 Life]

Rather buy 19z kit from JHM FOR A few hundred more. They are only 2400 and you get a much better rotor and caliper and they are bigger. The caliper weight isnt what matters thats dead weight its the rotational.mass thats important thats what makes the jhm kit good it doesn't weigh much more than stock for the size upgrade you get it won't slow down acelleration much.

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[KFizz]

Do you think it would be possible to remove the brackets from these so they fit a smaller rotor?

I like the idea of this but I think the 380mm is a bit much.

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[adamazing]

Do you think it would be possible to remove the brackets from these so they fit a smaller rotor?

I like the idea of this but I think the 380mm is a bit much.

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I don't think it's possible. The bridge is a solid part of the caliper.

EDIT: Nevermind, I guess they can be separated.

[LINDW4LL]

Do you think it would be possible to remove the brackets from these so they fit a smaller rotor?

Certainly possible, though unless you already have a bracket for 365mm the the easier way would be to have some material shaved from the caliper mounting bosses (where it meets the bracket).

[hyperunion]

I don't think it's possible. The bridge is a solid part of the caliper.

EDIT: Nevermind, I guess they can be separated.

Wow...🤔 Didn't realize these calipers were so inexpensive.. they are like cheaper a piece then some places selling new q5 brembos.. ridiculous price considering new official Brembo 6 Piston brake kits for our cars cost close to 4k and up

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[A4 Centaur]

Great find! Certainly looks to be a viable option for folks looking to upgrade.

[Zach L]

Rather buy 19z kit from JHM FOR A few hundred more. They are only 2400 and you get a much better rotor and caliper and they are bigger. The caliper weight isnt what matters thats dead weight its the rotational.mass thats important thats what makes the jhm kit good it doesn't weigh much more than stock for the size upgrade you get it won't slow down acelleration much.

Calipers are unsprung mass. While they won't directly affect power output to the pavement, they're weight affects suspension and handling dynamics.

[Audi 4 Life]

Calipers are unsprung mass. While they won't directly affect power output to the pavement, they're weight affects suspension and handling dynamics.

That's interesting i never thought about it affecting suspension and handling. Thanks for sharing that.

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[adamazing]

Bumping this.

I PM'd Jason at ECS to see if they have the time or the availability to mock this up on a B8 anytime soon.

[jjvwg]

dont count on it. you cant even get them to check caliper templates on wheels before purchase. what you're asking is way too much work of them.

[adamazing]

dont count on it. you cant even get them to check caliper templates on wheels before purchase. what you're asking is way too much work of them.

It's a shot - questions are free. If they don't, they don't. Then we'll have to wait for someone or some people with the components to test fit it all one day.

[adamazing]

UPDATE:
ECS can't help us at the moment. Their supply chain of these calipers is sourced through US dealerships, and there's only two available in the entire country.

Additionally, a part revision is coming for these calipers and the replacements are $1400+.

[SleeperCar]

UPDATE:
ECS can't help us at the moment. Their supply chain of these calipers is sourced through US dealerships, and there's only two available in the entire country.

Additionally, a part revision is coming for these calipers and the replacements are $1400+.

[S4BlackCab]

Subscribed for updates.

Questions:

-What pads fit these calipers?
-who can confirm that these will directly bolt to a B8.5?

[S4BlackCab]

Bump

[adamazing]

Subscribed for updates.

Questions:

-What pads fit these calipers?
-who can confirm that these will directly bolt to a B8.5?

We just discovered this potential option about two weeks ago. No one has tried it yet... but you could be the first.

[BIG_ROOSTER]

Caliper on its way and I have a 380 rotor laying around from the 17z and 18z I worked on last year


IT IS KNOWN

[AUDacIouS4]

Did anyone notice the price went
up on those calipers from $400 to $1600?

[punkalex1]

Did anyone notice the price went
up on those calipers from $400 to $1600?

Read up a revision was going to come out for these making them expensive

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[BIG_ROOSTER]

Let me start this off with.

Audi ceramic on top, 18z, then 17z also a banana for scale.

The caliper fits perfectly with the 380mmx36mm rotor. Now if I could only remember what car that rotor is from when I ordered it. I know it was only $70 from advanced auto parts for some strange reason. Has plenty of clearance all around.







IT IS KNOWN

[adamazing]

Oh man, I'm excited to see the end result. It's kind of a moot point now since they exponentially raped the pricing these things now. But definitely still eager to see these up and running.

[BIG_ROOSTER]

What I don't understand is they only raised the price of the passenger side. If you look at the calipers they are symmetrical why couldn't you run a left side on the right just flip the carryover line and bleeder valves


IT IS KNOWN

Edit under further examination you'd have to swap the outside pistons. Holes are the same pistons and inside of seal are different. Looks like just pop them out then swap them and then bob's your uncle and you have two lefts for $450.

[Party_Marty]

Oh man, I'm excited to see the end result. It's kind of a moot point now since they exponentially raped the pricing these things now. But definitely still eager to see these up and running.

wait wait wait, so let me get this right, price was around $400, retailers saw that we could use them for our cars, price jumps to $1800?

[adamazing]

wait wait wait, so let me get this right, price was around $400, retailers saw that we could use them for our cars, price jumps to $1800?

It is extremely coincidental, but I seriously doubt this thread is what caused a nationwide/global hike in price. According to ECS, Audi slotted a revision to this caliper, and that's the driving force behind the massive increase.

[Zach L]

Thanks for posting the pics and your findings!

What I don't understand is they only raised the price of the passenger side. If you look at the calipers they are symmetrical why couldn't you run a left side on the right just flip the carryover line and bleeder valves

Edit under further examination you'd have to swap the outside pistons. Holes are the same pistons and inside of seal are different. Looks like just pop them out then swap them and then bob's your uncle and you have two lefts for $450.

That wouldn't work because of the location of the different size pistons. The larger pistons are at the top of the caliper, and the last to contact the rotor as it passes through the caliper. Even if you swapped bleeder screw and brake line connection points, flipping would cause the piston location to be backward.

[Turbavanttro]

I've confirmed the RS5 Ceramic Calipers with the ECS 380x34mm rotor and bracket kit are a plug and play perfect fit. And the RS5 brackets that come pre-installed on the ceramic calipers need to be swapped with the ECS caliper brackets that come with the ECS rotor/bracket kit. I also used the RS5 ECS exact-fit stainless brake lines, everything fit perfectly.

I'll upload some pics soon.

[jjvwg]

so I have to ask, does anyone else think that the audi ceramic caliper looks exactly the same as the 19Z...my guess is they are exactly the same given they look exactly the same and that many audi/porsche parts are interchangeable. That being said, it appears that purchasing the "audi" calipers will cost you $2000 plus the cost of the rs5 rotor/bracket combo which is $1059, putting you at a total of $3059. If you go the 19Z route you can buy brand new calipers online for $1200, and the rotor/bracket kit off ecs for $716 right now, which totals out to $1916. Thats quite the difference. probably not worth the premium on the "audi" calipers unless you were planning on running the ceramic rotors meant for them which would probably cost more than all of the other parts required for the setup. just my .02.

[LINDW4LL]

so I have to ask, does anyone else think that the audi ceramic caliper looks exactly the same as the 19Z...my guess is they are exactly the same given they look exactly the same and that many audi/porsche parts are interchangeable.

Yep, it's for sure the same casting as 19Z.

As far as cost, when this thread was originally started, the RS5 Ceramic calipers were on sale for $389 per side. Thus the whole idea arising.

[johnnySV]

@turbavanttro if you want to fit up an RS5 master cylinder for reduced pedal throw then i'm happy to share lessons learned... hit me up you know how to find me


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