Why did AMG stop using 4 piston rear calipers
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
Why did AMG stop using 4 piston rear calipers
I noticed for quite sometime that AMG as a whole stop incorporating 4 piston rear calipers on all their AMGs. If I'm not mistaken, I think in 2016 they stopped using them, and started utilizing a sliding rear caliper. Why? I mean, you have a better clamping force with a 4 piston caliper than a sliding rear caliper. It is that the front 6 piston calipers are doing most of the work. Typically most cars have a 70/30 or 60/40 brake proportion anyway. Can someone shed some light on this for me?
SPONSOR
Joined: Sep 2014
Posts: 3,647
Likes: 818
From: Worldwide
2007 Mercedes E63 AMG
beyond cost savings there is no reason to do so. I don't like it either but AMG's higher models do have multi piston calipers on the rear.
example.
AMG GT does not
AMG GTR does
example.
AMG GT does not
AMG GTR does
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
I have looked at various pictures of the AMG GT R's rear brakes and they are one piston rears. Not two piston as you describe.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
I just saying that 4 piston offer a better clamping force on the rotors, then a single piston. And why did AMG get rid of them on their cars, I think that it's a cost savings. They probably feel that a single sliding caliper, offers enough clamping force for their rear brakes.
MBWorld Fanatic!
Joined: Aug 2014
Posts: 1,060
Likes: 98
From: Montreal, QC
E55 AMG & C63 AMG
Been wondering the same thing. Sliding rear calipers are a joke.
It is especially ridiculous on a car equipped with CCB's... a sliding rear caliper on the rear? Seriously?
It is especially ridiculous on a car equipped with CCB's... a sliding rear caliper on the rear? Seriously?
Trending Topics
MB World Stories
The Best of Mercedes & AMG
8 Oddball Mercedes Ideas That Actually Made it to Production
Verdad Gallardo
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look
Verdad Gallardo
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
But to continue the conversation, as this isn't about the AMG GT R, but all AMG's 
And the question still remains, why has Mercedes-AMG choose to utilize a single piston floating rear calipers isn't of the 4 piston Brembo's that they used on all 55s and 63s of the past. I don't think that a single AMG model today, even has 4 piston rears anymore 
But I'm glad that my car still does 
And the question still remains, why has Mercedes-AMG choose to utilize a single piston floating rear calipers isn't of the 4 piston Brembo's that they used on all 55s and 63s of the past. I don't think that a single AMG model today, even has 4 piston rears anymore But I'm glad that my car still does
Super Member
Joined: Jan 2010
Posts: 692
Likes: 11
From: Murfreesboro, TN
SRT-6
That is really bizarre. I know one of the first mods we always did in the Crossfire crowd was try to find a set of 4/2 (or 6/4, if you had $$$) and swap out the old single-piston floaters (which SUCKED).
A friend of mine swapped a Brembo 6/4 setup onto his R170 AMG, and it would almost detach your retinas when the brakes were applied.
Ultimately it's hydraulic force multiplication + swept area that stops the car, so if they can achieve the same brake bias with a single (less-complicated, cheaper) caliper, then there's the "why".
But, this is the same company that put's Burmeister sound systems in their cars so LOL
A friend of mine swapped a Brembo 6/4 setup onto his R170 AMG, and it would almost detach your retinas when the brakes were applied.
Ultimately it's hydraulic force multiplication + swept area that stops the car, so if they can achieve the same brake bias with a single (less-complicated, cheaper) caliper, then there's the "why".
But, this is the same company that put's Burmeister sound systems in their cars so
LOL
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
I remember when the S63 broke from the norm and went with the big twin floating front caliper, I thought that was ludacris, but it offered a better and smoother braking feel. Well, I can see that for such a big luxury car. I know that in my car, you touch the brake pedal and you immediately feel the initial bite. More often and not, that applying the brakes can be harsh, meaning they bite hard. And that's the power of 6 piston calipers. When you have a car with 500+ HP, you need outstanding brakes to slow that beast down, not some floating caliper.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
Somebody please provide a really good answer to my question....please. I really do think it's all about cost savings. 
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
MBWorld Fanatic!
Joined: Dec 2008
Posts: 2,190
Likes: 35
shrimp boat
Do you know how many people that buy AMG cars actually know what AMG is? Most are buying them because it's the most expensive one in the line up. Squealing brakes is easily fix if you know how to drive and what to do, but it's even easier to bring it back to the dealer and complains.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
High performance brakes will squeal at some point, it's inevitable. That fact is even stated in the owners manual. And your right a majority of AMG owners do even know what AMG stands for! I was at an AMG Performance Drive a few years ago, and won an Official AMG Ball Cap because I answered numerous questions correctly about AMG. I looked around and I was the only person with answers. You can tell that the AMG rep was looking around for someone else to answer the questions, but no takers except for me 
AMG was founded by former Mercedes engineers Hans Werner Aufrecht and Erhard Melcher in Burgstallas in 1967 under the name AMG Motorenbau und Entwicklungsgesellschaft mbH (AMG Engine Production and Development, Ltd.) this fact eludes most AMG Owners
AMG was founded by former Mercedes engineers Hans Werner Aufrecht and Erhard Melcher in Burgstallas in 1967 under the name AMG Motorenbau und Entwicklungsgesellschaft mbH (AMG Engine Production and Development, Ltd.) this fact eludes most AMG Owners
Senior Member
Joined: Jun 2014
Posts: 471
Likes: 32
W211 E55 2003
its 2017. everything is about how to make savings and make more money. the way the car leaves the factory, it has more than enough braking power to handle the amount of horsepower and weight of the car. everything is a compromise between cost and practicality. they can make what ever they want with those cars, it just comes down to where you draw the line.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
they had the same old headliner you find in a standard C Class, what a let done
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
So do you think that the single floating rear caliper, offers more of less of a clamping force on the rotors, as compared to the 4 piston setup?
SPONSOR
Joined: Sep 2014
Posts: 3,647
Likes: 818
From: Worldwide
2007 Mercedes E63 AMG
the differences between floating and multi piston calipers do stand out for performance driving.
floating will be less responsive, have flex in the pedal, and have a higher possibility for uneven pad wear.
I'm honestly not to sure you can feel those differences that much on the rear of the vehicle. the front braking system equates to something like 60-80% of all stopping force. I'm sure you "can" feel it, but it would be marginal in comparison to the front.
floating will be less responsive, have flex in the pedal, and have a higher possibility for uneven pad wear.
I'm honestly not to sure you can feel those differences that much on the rear of the vehicle. the front braking system equates to something like 60-80% of all stopping force. I'm sure you "can" feel it, but it would be marginal in comparison to the front.
SPONSOR
Joined: Sep 2014
Posts: 3,647
Likes: 818
From: Worldwide
2007 Mercedes E63 AMG
ya...love my B6 A4...I've had 4 of them...love my E63 too...I'd get another if something were to happen to this one. seems signatures only display if you're on the full site and not the mobile site.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
I'm the opposite, I've had a total of 6 Mercedes. I loved the E63 so much, I bought another one.
2 E63
1 C63
1 E350
1 C300
1 C230
2 E63
1 C63
1 E350
1 C300
1 C230
Thread Starter
MBWorld Fanatic!
Joined: Apr 2009
Posts: 6,025
Likes: 532
From: Alexandria, VA
07 E63 AMG, 10 C63 AMG, 07 E63 Designo, 07 E350, 09 C300, 07 C230
Certainly, the pads are cheaper but don't look as good as 4 piston rears, besides that they don't perform as well, in my opinion. But AMG thought they were god enough to place them on all of there AMGs these days. So there must be some performance gains associated with them. Guessing....... probably weight savings?
