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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > 135i Caliper fit 335i?



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      07-08-2008, 10:29 AM   #23
PARTS MAN
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there is a factory bbk that bmw has for the e90. uses 6piston calipers,rotors,and hardware
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      07-08-2008, 11:05 AM   #24
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Quote:
Originally Posted by PARTS MAN View Post
there is a factory bbk that bmw has for the e90. uses 6piston calipers,rotors,and hardware
link?
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      07-16-2008, 01:22 AM   #25
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Why would you want a SMALLER brake? The 335i has bigger brakes than the 135i. Bigger piston count doesn't necessarily mean better performance.

FWIW - I believe the stock 335i system to be pretty capable. Put it this way - I had to replace a set of race pads recently because the 335i brakes are so powerful, they BENT the race pads. Literally bent them.
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      07-16-2008, 10:30 AM   #26
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Quote:
Originally Posted by PARTS MAN View Post
there is a factory bbk that bmw has for the e90. uses 6piston calipers,rotors,and hardware
I've heard about this too but haven't seen any news surface in regards to availability.
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      06-16-2017, 01:29 PM   #27
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the fronts bolt up to my 2011 335 xi with just the heat sheild modified, 135 08' rotors, and a slight trim of the mount as it has small clearance issues. the rear i still do not know. i was told of a few ways but i am exploring options as the e brake inside the hub doesnt clear most rotors. and just from driving it, say hat you want about mathematical formulas, the fronts are better with the 135 set up.
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      06-16-2017, 03:19 PM   #28
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So while it's true that the front rotors are slightly smaller the pads are deefinitely significantly longer and six piston on the front making them poasibly more surface area and the obvious advance of a more efficient six piston system. The rears seem more opinion based. I am going to try several options tomorrow on the rears. The problem with the rears is the 335 xi 2011 has a drum emergency brake that doesn't clear most rotors. I've read a washer as a spacer can solve this when using 2013 535 x drive rotors and I know I could simply cut my 335 rotors to fit because aside from the Shield and some minor grinds they bolt up. I can either grind the inside of the 535 rotor to fit, use spaced washers so it doesn't have to fit, or grind stock rotors and hVe them cross drilled and slotted while I do. Keep you guys updated after the weekend. And my personal opinion is if it's not for the track the six piston are way better than the 335 as I beat warmled two 335 rotors and 0 135.
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      06-16-2017, 03:20 PM   #29
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Or I can completely change my e brake mechanics....
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      06-16-2017, 03:28 PM   #30
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Quote:
Originally Posted by stressdoc View Post
Do we know if the 6 pots outperform the OEM floaters on the 335? If not, what's the point?
Exactly, the 335i rotors are bigger so they might have better brake. Only way I see a upgrade is going with f30 335i brakes on the e90.
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      06-16-2017, 05:03 PM   #31
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Holy old thread revive batman. The 135i guys are having major issues with the ceramic heads if the Pistons cracking. Plus if there was any benefit of the 6 piston calipers on the e90 why didn't BMW put them on as stock like they did on the 135i. Or why did the e series m3 and m5 come with the same design of sliding single piston calipers as the 335i? Because they work and work well.
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      06-19-2017, 12:48 AM   #32
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Quote:
Originally Posted by david in germany View Post
Holy old thread revive batman. The 135i guys are having major issues with the ceramic heads if the Pistons cracking. Plus if there was any benefit of the 6 piston calipers on the e90 why didn't BMW put them on as stock like they did on the 135i. Or why did the e series m3 and m5 come with the same design of sliding single piston calipers as the 335i? Because they work and work well.


What did their big brother Porsche use?
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      06-19-2017, 01:33 AM   #33
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Quote:
Originally Posted by Dan Bilzerian View Post
What did their big brother Porsche use?
6 piston (much larger) calipers with rotors about 40% larger. Apples to oranges.
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      06-19-2017, 01:44 AM   #34
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Quote:
Originally Posted by david in germany View Post
6 piston (much larger) calipers with rotors about 40% larger. Apples to oranges.
They work though, I thought that was the argument.
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      06-19-2017, 02:20 AM   #35
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If you aren't tracking the car, these are fine and might even offer better pedal feel since it is a fixed caliper design. But if you are tracking the car, you are going to overheat these brakes a lot quicker than the stock 335i ones since you have smaller rotor, meaning less mass to dissipate the thermal load.
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      06-19-2017, 03:03 AM   #36
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They do in fact work. You need to allow clearance for the hub of the rotor for the ebrake the carrier and shield. A spacer kit would work but I decided to plain the back of a 535 rotor and use that. Bolted up
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      06-19-2017, 04:19 AM   #37
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Quote:
Originally Posted by Dan Bilzerian View Post
They work though, I thought that was the argument.
Not the point I was making. The specific 6 piston calipers bmw used are smaller and require a smaller rotor and have less surface area for contact with the pad and less cooling area.
The reason 135i guys have the issues with cracked heads is there is not enough surface area on the rotor to disapate heat and the ceramic smolders and crumbles. This causes uneven pressure on the pads and reduces braking even more.

The porche use a considerably larger rotor, bigger pad, and stainless pistons. If they didn't cross drill them like they do they could get away with about 20-30% smaller rotors because the venting reduces contact area (there is a published study on this out there) but I won't try to find it while on my iPad.

Bottom line, this thread was started about using 135i brakes on a 335i. The 135i brakes ARE an upgrade to a 328i or a 128i or even my 118i (I did it on my 118i) but they would be a downgrade to a 335i.
The larger 4 piston calipers from the F series car is different. They are using larger rotors and different pads and they ARE an upgrade to the 335i sliding design for those reasons.
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      06-19-2017, 04:51 AM   #38
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Quote:
Originally Posted by david in germany View Post
Not the point I was making. The specific 6 piston calipers bmw used are smaller and require a smaller rotor and have less surface area for contact with the pad and less cooling area.
The reason 135i guys have the issues with cracked heads is there is not enough surface area on the rotor to disapate heat and the ceramic smolders and crumbles. This causes uneven pressure on the pads and reduces braking even more.

The porche use a considerably larger rotor, bigger pad, and stainless pistons. If they didn't cross drill them like they do they could get away with about 20-30% smaller rotors because the venting reduces contact area (there is a published study on this out there) but I won't try to find it while on my iPad.

Bottom line, this thread was started about using 135i brakes on a 335i. The 135i brakes ARE an upgrade to a 328i or a 128i or even my 118i (I did it on my 118i) but they would be a downgrade to a 335i.
The larger 4 piston calipers from the F series car is different. They are using larger rotors and different pads and they ARE an upgrade to the 335i sliding design for those reasons.
Roger that! The only was the 135i brakes are an upgrade to the 335i is aesthetically.

If I put the front 33i5 brakes on my car would I need to change out the rears to compensate for the bigger brakes up front?
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      06-19-2017, 12:06 PM   #39
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Quote:
Originally Posted by Dan Bilzerian View Post
Roger that! The only was the 135i brakes are an upgrade to the 335i is aesthetically.

If I put the front 33i5 brakes on my car would I need to change out the rears to compensate for the bigger brakes up front?
You will jack up the brake bias either way.. get the f series brakes, skip the 135i brakes. There is a reason BMW does not recommend them on the 335i. You can probably piece together a good kit with F series parts for the same as the 135i brakes and be safer in the long run.
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      06-19-2017, 01:20 PM   #40
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Quote:
Originally Posted by david in germany View Post
You will jack up the brake bias either way.. get the f series brakes, skip the 135i brakes. There is a reason BMW does not recommend them on the 335i. You can probably piece together a good kit with F series parts for the same as the 135i brakes and be safer in the long run.
Even though I have a 325i? I was just going to put on the 335i ones. But if you still think I need the F msport ones then I'll take your advice lol
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      06-19-2017, 01:41 PM   #41
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Quote:
Originally Posted by Dan Bilzerian View Post
Even though I have a 325i? I was just going to put on the 335i ones. But if you still think I need the F msport ones then I'll take your advice lol
Sorry, I didn't notice you had a 325i, For the 325i the 135i brakes WOULD be an upgrade. The 335i brakes would be that much more. Take a look at the thread I started when I upgraded my wife's 328i to 335i brakes. That car stops better than my 335i with the same brakes. For your car, a 325. Find a set of e90 335i calipers, trim the stone shield to fit and stick in a set of budget pads and rotors and you will freak out how hard it stops once it is coded to the upgrade.
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      06-21-2017, 06:32 PM   #42
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What did you change in the coding? +SPBR?
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