Yuille36

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?

hachiroku

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

Yuille36

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.

e500slr

Doesn't the BMW 1M use a single piston front caliper? I don't think it's simply a matter of more pistons the better just like an engine, sometimes a V8 is superior to a V12.

Yuille36

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.

MTV10

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?

hachiroku

wow you're correct. I thought I read somewhere the GTR had fixed multi piston calipers. I guess not.

Yuille36

Thank you for that correction, I appreciate that

Yuille36

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

Kreuzfeuer

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

Yuille36

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.

Yuille36

Somebody please provide a really good answer to my question....please. I really do think it's all about cost savings.

Forrest Gump 9

Too many complaints about squealing brakes

Yuille36

But that's an easy fix, just by changing pads.

Forrest Gump 9

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.

Yuille36

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

Elhonaz

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.

Yuille36

I certainly understand this fact, I remember when I looked at a W212 E63, and was surprised to find that they eliminated the Alcantara headliner
they had the same old headliner you find in a standard C Class, what a let done

Yuille36

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?

hachiroku

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.

Yuille36

Thanks.....I just realized that we both have 07 E63's and Audi A4's

hachiroku

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.

Yuille36

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

Kreuzfeuer

Look on the plus side -- pads for the floating calipers are cheaper, for all of those standing burnouts

Yuille36

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?