[Seattlesquash]

Originally Posted by leeks

This is a few years too late but as I'm combing through the forum to see what everyone has done for their brakes. I'd like to point out that, as far as I gather from RealOEM, @Soravia is right about that for the E90. For example, randomly picking a E90 325i vs a E90 335i of the same production date (09/2010 in this case). Everything seems to match up nicely in size/diameter etc.

But if you had an E92 (like me). Things starts to get rather complicated at the rear.

Rear is easy mod, and you got several options but done in a few hours and no issue on E92!

Get it done my friend!

[leeks]

Hey @Seattlesquash, i was messaging @bluewater328 and he mentioned that you did the mod.

Well my situation is a little trickier + plus I'm lazy. What did you end up doing? I think I might just end up getting the fronts of the performance brakes and leave the rear as-is (replacement set).
I need everything to look OEM to get anywhere close to inspection here. But I'm sure the yellow fronts and the silver metallic rears will send tears everytime I think about it

[bluewater328]

Originally Posted by leeks

Hey @Seattlesquash, i was messaging @bluewater328 and he mentioned that you did the mod.

Well my situation is a little trickier + plus I'm lazy. What did you end up doing? I think I might just end up getting the fronts of the performance brakes and leave the rear as-is (replacement set).
I need everything to look OEM to get anywhere close to inspection here. But I'm sure the yellow fronts and the silver metallic rears will send tears everytime I think about it

Or buy the f30 335i front 340mm calipers. They are grey, will look stock if someone didn't know and significantly add braking power; or the grey 135i 6piston (actual E9x spec'd/listed "Performance brake upgrade"). No attention added. Or you go hardcore.

[Biginboca]

Originally Posted by bluewater328

Or buy the f30 335i front 340mm calipers. They are grey, will look stock if someone didn't know and significantly add braking power; or the grey 135i 6piston (actual E9x spec'd/listed "Performance brake upgrade"). No attention added. Or you go hardcore.

This! I ended up just doing the front swap only on my 328i e92. I’m running the 340mm rotors and the grey brembo 4 pots for the last 18 months. This is an amazing upgrade for the price and is all you need. It looks totally stock also! The calipers even say bmw on them and are more than adequate for a 328.

[Soravia]

The biggest park of the 4 pot is much better brake pedal feel.
It is not as much but you can also improve the 335i brake pedal feel by using ECS Tuning unequal length brass caliper pin bushing kit.
Just be sure to sand blast the used rotor pin holes or use a rebuild. Dirt and stuff in bushing insert hole will deform the soft brass and make the tight fit pin hole unusable.
A budget trick for existing 335i brake owners.
I've only done the front pair. Not sure if rear pair will add more pedal feel.

[W37V]

Originally Posted by Biginboca

This! I ended up just doing the front swap only on my 328i e92. I’m running the 340mm rotors and the grey brembo 4 pots for the last 18 months. This is an amazing upgrade for the price and is all you need. It looks totally stock also! The calipers even say bmw on them and are more than adequate for a 328.

I have the same setup. It's more than adequate for daily driving. I am about to upgrade the rears to 335i, with modified parking brake. I am somewhat confused with everyone talking about improved brake feel. If anything, the setup made mine bit softer, to the extend that I lead my lines 3 times just to make sure everything is proper.

[Biginboca]

Originally Posted by W37V

I have the same setup. It's more than adequate for daily driving. I am about to upgrade the rears to 335i, with modified parking brake. I am somewhat confused with everyone talking about improved brake feel. If anything, the setup made mine bit softer, to the extend that I lead my lines 3 times just to make sure everything is proper.

Me too! I did a lot of bleeding. I was able to code the sport brake option and that helped the mushy pedal, and I think I just got used to it in time. The stopping power is there for sure!

[Soravia]

Originally Posted by W37V

I have the same setup. It's more than adequate for daily driving. I am about to upgrade the rears to 335i, with modified parking brake. I am somewhat confused with everyone talking about improved brake feel. If anything, the setup made mine bit softer, to the extend that I lead my lines 3 times just to make sure everything is proper.

Did you run ABS pump sequence to get all the tiny bubbles out?
Also anyone will get better pedal feel just by new pads anyways.

I had a hard time bleeding when I flipped the rear left to right and upside down on the bleed nipple. Couldn't get air out when bleed nipple faces down and air was trapped above it.

[W37V]

Originally Posted by Biginboca

Me too! I did a lot of bleeding. I was able to code the sport brake option and that helped the mushy pedal, and I think I just got used to it in time. The stopping power is there for sure!

Oh yeah. Stopping power is immense. I did 3 hard stops in a row. It made me throw up. With proper tires and surface, with this setup, this car stops on the dime. Totally amazing upgrade.

How did you code sports brakes? I looked for instructions, but I can't find what to change and how.

[W37V]

Originally Posted by Soravia

Did you run ABS pump sequence to get all the tiny bubbles out?
Also anyone will get better pedal feel just by new pads anyways.

I had a hard time bleeding when I flipped the rear left to right and upside down on the bleed nipple. Couldn't get air out when bleed nipple faces down and air was trapped above it.

No I did not. I used a stick to push on the brake pedal while changing the caliper, so fluid loss was minimal. When I do rear brakes, I will flush the system again. Do you have any instructions on how to do ABS pump?

[Biginboca]

Originally Posted by W37V

Oh yeah. Stopping power is immense. I did 3 hard stops in a row. It made me throw up. With proper tires and surface, with this setup, this car stops on the dime. Totally amazing upgrade.

How did you code sports brakes? I looked for instructions, but I can't find what to change and how.

Bimmergeeks Pro Tool is what I used, although there’s a way to code it with the laptop software too obviously.

[bluewater328]

Originally Posted by W37V

No I did not. I used a stick to push on the brake pedal while changing the caliper, so fluid loss was minimal. When I do rear brakes, I will flush the system again. Do you have any instructions on how to do ABS pump?

https://bmw.***********.com/threads/...ke-bleed.3319/

[W37V]

Originally Posted by bluewater328

https://bmw.***********.com/threads/...ke-bleed.3319/

Thank you!
Since post is blocking competing forum, for anyone interested to access mentioned link, search for INPA DSC Brake Bleed.

[Soravia]

Originally Posted by W37V

No I did not. I used a stick to push on the brake pedal while changing the caliper, so fluid loss was minimal. When I do rear brakes, I will flush the system again. Do you have any instructions on how to do ABS pump?

I used the handheld tool from Amazon. It can firmware upgrade through USB so it can be used for many many BMWs. Useful for more than one car, and handy in tight spots.
AutoPhix 7910.

But our forum sponsor ECS Tuning sell similar stuff. Made by other brand Foxwell. 20% off right now. Comes with extra connector for older BMWs.

Click the first link to get sponsorship points for forum

http://www.ecstuning.com/stage/edpd/...=e90postbanner


https://www.ecstuning.com/b-schwaben...020sch01a~scf/

[eljay]

Originally Posted by W37V

I have the same setup. It's more than adequate for daily driving. I am about to upgrade the rears to 335i, with modified parking brake. I am somewhat confused with everyone talking about improved brake feel. If anything, the setup made mine bit softer, to the extend that I lead my lines 3 times just to make sure everything is proper.

I am having the same problem after swapping my 328 setup to 335i calipers. I did the same as you with applying brakes to close the master and I did not have any fluid leaking out when disconnecting the lines and bled all the tiny air bubbles out.

The pedal is way too soft. I used Motive Bleeder, but did not do the ABS INPA bleed. Perhaps that's what I'm missing.

The stopping power is there when I went to bed in the new rotors and pads, but pedal is too soft at the top of the travel. Makes heel/toe difficult now. Frustrating.

[bbnks2]

Originally Posted by eljay

I am having the same problem after swapping my 328 setup to 335i calipers. I did the same as you with applying brakes to close the master and I did not have any fluid leaking out when disconnecting the lines and bled all the tiny air bubbles out.

The pedal is way too soft. I used Motive Bleeder, but did not do the ABS INPA bleed. Perhaps that's what I'm missing.

The stopping power is there when I went to bed in the new rotors and pads, but pedal is too soft at the top of the travel. Makes heel/toe difficult now. Frustrating.

You have to do with Inpa bleed 2-3x even. Then re-assess. You'll have a softer pedal no matter what. Pedal will have much more "dead space." Then the actual brake engagement will be much more abrupt. So more dead space and then very "clampy" brake engagement. I guess you can say you'll have less travel to fine tune pedal inputs. It's something you'll get used to with muscle memory after a few drives.

I have M3 calipers on my 135i and while people say they don't feel any difference in sponginess it is most definitely much different now. Some people just flat out aren't as in tune with these things.

[eljay]

Originally Posted by bbnks2

You have to do with Inpa bleed 2-3x even. Then re-assess. You'll have a softer pedal no matter what. Pedal will have much more "dead space." Then the actual brake engagement will be much more abrupt. So more dead space and then very "clampy" brake engagement. I guess you can say you'll have less travel to fine tune pedal inputs. It's something you'll get used to with muscle memory after a few drives.

I have M3 calipers on my 135i and while people say they don't feel any difference in sponginess it is most definitely much different now. Some people just flat out aren't as in tune with these things.

Thanks. I'll give it a try. Too bad I just discovered this after having the car lifted with wheels off already. I suppose I can do this with just lifting the car and accessing the bleeder. Just need to make sure not to get any fluid on the wheel.

I'll get used to shorter usable travel. That's no problem. And with ceramic pads, the problem is even worse with less initial cold bite and then STOP. But again, I don't have an issue with adjusting.

It's interesting that all of these applications result in softer pedal. I wonder if a 328 driver would jump into a 335i or M3 and notice a difference or is all of this a symptom of opening up the brake system and never being able to get back to perfectly bled system?

[bbnks2]

Originally Posted by eljay

Thanks. I'll give it a try. Too bad I just discovered this after having the car lifted with wheels off already. I suppose I can do this with just lifting the car and accessing the bleeder. Just need to make sure not to get any fluid on the wheel.

I'll get used to shorter usable travel. That's no problem. And with ceramic pads, the problem is even worse with less initial cold bite and then STOP. But again, I don't have an issue with adjusting.

It's interesting that all of these applications result in softer pedal. I wonder if a 328 driver would jump into a 335i or M3 and notice a difference or is all of this a symptom of opening up the brake system and never being able to get back to perfectly bled system?

It's a function of adding larger calipers without also upgrading the master cylinder bore size. It's a fact that you'll have a softer initial pedal and then a more grabby/high pressure clamping once you get into the pedal more.

[eljay]

Originally Posted by bbnks2

It's a function of adding larger calipers without also upgrading the master cylinder bore size. It's a fact that you'll have a softer initial pedal and then a more grabby/high pressure clamping once you get into the pedal more.

Oh OK. I thought master cylinder upgrade was not needed for 335i calipers and only once M3 or Performance calipers are used.

The master cylinder is the same part number between 328i and 335i: 34336785664.

So, I don't understand why that would make a difference.

[bbnks2]

Originally Posted by eljay

Oh OK. I thought master cylinder upgrade was not needed for 335i calipers and only once M3 or Performance calipers are used.

The master cylinder is the same part number between 328i and 335i: 34336785664.

So, I don't understand why that would make a difference.

It doesn't matter that the master cylinder is the same size... what matters is that you have the muscle memory of how the brakes feel with the smaller 328i calipers and now you put on bigger 335i calipers... that changes how the pedal will feel.

[S65Hunter]

I think I might try and do this. Found a few sets of 335 calipers with brackets for ~$100

*UPDATE*

I'm buying a set of f30 4pots, do I need 335i brakes or will my stock e93 328 brakcets work?