F85/F86 rear brake caliper upgrade

[pk9394]

Do anyone upgrade the rear brake caliper? Just don't know why BMW cheap out these rear calipers in all these 100k cars. even the new M5 had the single piston caliper!

[foldpages]

Originally Posted by pk9394

Do anyone upgrade the rear brake caliper? Just don't know why BMW cheap out these rear calipers in all these 100k cars. even the new M5 had the single piston caliper!

It's not just BMW. AMG is doing the same. Long post here:

https://mbworld.org/forums/w211-amg/...-calipers.html

[Kraftwerk AG]

Originally Posted by foldpages

It's not just BMW. AMG is doing the same. Long post here:

https://mbworld.org/forums/w211-amg/...-calipers.html

Yep this is a pet peeve of mine also. Even on the models with the Carbon Ceramic brake package as an option, single piston calipers!

[pk9394]

But the cheap ugly alfa Q4's have 4 pistons on the back

[foldpages]

Originally Posted by pk9394

But the cheap ugly alfa Q4's have 4 pistons on the back

I remember reading somewhere it has to do with the electronic parking break - but no clue if that's true or not. It's probably just a way for BMW to save some bucks.

[musa]

At times BMW simply takes their sweet time adopting the latest and greatest tech in their vehicles. I recall when touch screen head units were common place way back in 2013 and yet it took nearly 4 years for BMW to install them on their expensive vehicles. It can be puzzling.

[iconoclast]

My E63 wagon has carbon ceramic and Brembo calipers all four corners. 6 pot front and 4 pot rear. The '14 E63 Wagon I owned had the standard steel brakes (red caliper) and all four corners were Brembo as well with the same configuration.

[EricU]

My 2016 FtypeR has Brembo carbon ceramics on all four. 6 pot front and 4 pot rear with separate rear electronic parking brake. Not sure why my F85 just had 1 pot rear...

[DgjoX6M2016]

I am sure there is a lot of engineering work and complex calculations going on here and the clamping force needed at the rear disc simply doesn't require any more piston surface area. Might not look as 'fancy' but it is likely it simply isn't needed. I suspect too much clamp in the back will require ABS intervention all the time.

[Maverik259]

It's to save money. 4pot in the rear of a front engine vehicle just aren't needed on the street. But that doesn't excuse them as far as I'm concerned. Hell even a 2 piston fixed would look better than the floating 1 piston and not cost that much more. But hey they do it and you still buy it.

As far as an upgrade, you have brembo rear or the rear 4 pots from the panamara can be made to fit the rotor. A company out of Russia does it. Sells on eBay for $1600. Includes calipers, paint, adapters, and as brake lines.

Hell my dads 2014 F type R doesn't come with any type of fixed calipers! (Or a rear view camera or heated seats) lol

[EricU]

Originally Posted by DgjoX6M2016

I am sure there is a lot of engineering work and complex calculations going on here and the clamping force needed at the rear disc simply doesn't require any more piston surface area. Might not look as 'fancy' but it is likely it simply isn't needed. I suspect too much clamp in the back will require ABS intervention all the time.

I have to admit that I do like my "fancy" rear brakes weather they are actually necessary or not...

[yewlock]

Originally Posted by Maverik259

It's to save money. 4pot in the rear of a front engine vehicle just aren't needed on the street. But that doesn't excuse them as far as I'm concerned. Hell even a 2 piston fixed would look better than the floating 1 piston and not cost that much more. But hey they do it and you still buy it.

As far as an upgrade, you have brembo rear or the rear 4 pots from the panamara can be made to fit the rotor. A company out of Russia does it. Sells on eBay for $1600. Includes calipers, paint, adapters, and as brake lines.

Hell my dads 2014 F type R doesn't come with any type of fixed calipers! (Or a rear view camera or heated seats) lol

Originally Posted by EricU

I have to admit that I do like my "fancy" rear brakes weather they are actually necessary or not...

My neighbor have a new SVR. Look nice and exhaust note sounds good. How is the reliability of the F type?

[pachieh]

Originally Posted by foldpages

I remember reading somewhere it has to do with the electronic parking break - but no clue if that's true or not. It's probably just a way for BMW to save some bucks.

It's not as they have an electronically activated traditional e-brake shoe setup.

As for the retrofit by tronik, don't know if anyone on here actually did it. Tronik got banned for some reason from the board.

[iconoclast]

Originally Posted by DgjoX6M2016

I am sure there is a lot of engineering work and complex calculations going on here...

i read that as calculations and financial engineering. i believe it is to save cost on something that is most likely not needed to begin with and is an aesthetic improvement for majority of the people who drive these vehicles. i would love a proper four pot set up in the rear but the vehicle brakes just fine without issue as is because even the $14k ccb upgrade (p/n: 34112317804) has the larger caliper and the rear still utilizes the single piston. the nice thing about the ccb kit is not only does it save you about 50lbs in unsprung weight but it also lightens your wallet.





if i recall correctly there is a guy over on the x5 forum who took the fronts from E70 X5M and installed them in the rear.

[ajob]

Don't mess with the brakes, they are part of a complex, highly engineered system.

[tastelid]

Originally Posted by musa

At times BMW simply takes their sweet time adopting the latest and greatest tech in their vehicles. I recall when touch screen head units were common place way back in 2013 and yet it took nearly 4 years for BMW to install them on their expensive vehicles. It can be puzzling.

touch screen in a car still seems pointless to me, just a fingerprint magnet

but my bmw bikes have brembo brakes...

[EricU]

Originally Posted by iconoclast

i read that as calculations and financial engineering. i believe it is to save cost on something that is most likely not needed to begin with and is an aesthetic improvement for majority of the people who drive these vehicles. i would love a proper four pot set up in the rear but the vehicle brakes just fine without issue as is because even the $14k ccb upgrade (p/n: 34112317804) has the larger caliper and the rear still utilizes the single piston. the nice thing about the ccb kit is not only does it save you about 50lbs in unsprung weight but it also lightens your wallet.

[img]https://i.ebayimg.com/images/g/23QAA...Q4/s-l1600.jpg[/img]

[img]https://i.ebayimg.com/images/g/klsAA...Q~/s-l1600.jpg[/img]

if i recall correctly there is a guy over on the x5 forum who took the fronts from E70 X5M and installed them in the rear.

CCB's also have no dust to clean so saves time. However, my F85 rims are ceramic pro'ed so brake dust just wipes off with ease.

[EricU]

Originally Posted by yewlock

My neighbor have a new SVR. Look nice and exhaust note sounds good. How is the reliability of the F type?

My 2016 FtypeR has 6750 mi. Reliability has been ok...

1. Cooling fan failed at 4000 mi and car overheated. Required stopping at side of highway and a flatbed ride to dealership.

2. Eats batteries. Replaced twice already.

All of above covered by 5 yr warranty...

[Maverik259]

Originally Posted by yewlock

My neighbor have a new SVR. Look nice and exhaust note sounds good. How is the reliability of the F type?

Not bad. No major issues that he's told me about. His biggest complaint is the interior knobs are getting all gummy from the Florida heat.

Originally Posted by iconoclast

i read that as calculations and financial engineering. i believe it is to save cost on something that is most likely not needed to begin with and is an aesthetic improvement for majority of the people who drive these vehicles. i would love a proper four pot set up in the rear but the vehicle brakes just fine without issue as is because even the $14k ccb upgrade (p/n: 34112317804) has the larger caliper and the rear still utilizes the single piston. the nice thing about the ccb kit is not only does it save you about 50lbs in unsprung weight but it also lightens your wallet.

[img]https://i.ebayimg.com/images/g/23QAA...Q4/s-l1600.jpg[/img]

[img]https://i.ebayimg.com/images/g/klsAA...Q~/s-l1600.jpg[/img]

if i recall correctly there is a guy over on the x5 forum who took the fronts from E70 X5M and installed them in the rear.

Ya but they look so damn good! And you can still replace that rear caliper with a 4 pot! Lol Just need to have the correct brake pads!

[pk9394]

Originally Posted by Maverik259

As far as an upgrade, you have brembo rear or the rear 4 pots from the panamara can be made to fit the rotor. A company out of Russia does it. Sells on eBay for $1600. Includes calipers, paint, adapters, and as brake lines.

Interesting...

[iconoclast]

Originally Posted by Maverik259

Ya but they look so damn good! And you can still replace that rear caliper with a 4 pot! Lol Just need to have the correct brake pads!

What about the booster? When swapping to CCB there is a different booster. When going to MPBK F15/F16 one needs to code for the upgrade. What would be needed to get that rear set functional without changing pedal feel and drivability?

[Maverik259]

Originally Posted by iconoclast

What about the booster? When swapping to CCB there is a different booster. When going to MPBK F15/F16 one needs to code for the upgrade. What would be needed to get that rear set functional without changing pedal feel and drivability?

The coding would be the same as F85. As far as the booster Idk anything about it. Just swap it?