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01-14-2020, 07:25 AM | #1 |
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128i BMW Performance Brake Kit Questions and Discussion
I picked up a set of front BMWPerformance calipers and rotors for a good deal and it made me start to consider what, if anything I should do with the rear calipers/rotors etc.
The RealOEM diagram ( https://www.realoem.com/bmw/enUS/sho...diagId=03_0118 ) doesn't spec out a rear rotor anymore however the caliper part number is slightly different than the OEM 128i PN ( 34216768697 / 698 for BMWPerf rears 34216768693 / 694 for OEM 128i rears). The rear calipers are the same as many of the E9X platform and some F3X platform cars, so sourcing used calipers to clean up and paint should be easy. The pad part numbers are interchangeable ( 34216790761 ). The hangup right now for me is deciding what is required for a rotor. The stock rotor is a 300 x 20 mm 34216855005 but the rotor used on the E9X "BMW Performance" style caliper is 34216855007 (Still 300 x 20). Is there a way to find out the exact differences between the 2 rotors and if they are specified the same, I will likely just use the stock rear rotors but if they are NOT the same, I will have to decide what I want to do... if its worth buying and swapping additional calipers, rotors, pads etc. |
01-14-2020, 08:08 AM | #2 | |
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01-14-2020, 08:16 AM | #3 | |
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Edit: after digging a bit more, Based on the pictures from ECS, the rear rotors are PN 34216778051 which is equivalent to 34216855005 which is the stock rotor. Should bolt up just fine Last edited by b1aze; 01-14-2020 at 08:33 AM.. |
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01-17-2020, 07:57 AM | #5 |
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I have a set of StopTech sport slotted rotors, pads and sensors for the 128i I am trying to get rid of. I have a posting on the for sale section but I can give you more info if you are interested!
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02-13-2020, 08:47 PM | #6 |
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So I am in the process of replacing brakes on my 128i with the factory performance brake kit. I'll save the full details, but front brakes are same as 135i - 6 piston calipers, 2 pc drilled/slotted rotors, and pads. Rears are standard 300 mm x 20 mm, 128i rotors, calipers are larger piston, 328xi pieces (may be same as 328i?), and I have pads for 328i/xi which have multiple applications. I'm using Stop Tech drilled rotors on the rear, made specifically for ECS Tuning, same as the front 2 pc drilled/slotted rotors, and Red Stuff pads. So far, only fronts are done (one of the rear rotors was back ordered). Very pleased with brake bite and feel, have not done any bedding (will wait for rears and do it once) yet. Too early to determine the amount of dust.
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E9x M3 front & rear suspension arms; BMW Performance brakes upgraded to drilled rotors in rear; BMW performance shifter; BMW Performance Exhaust; Wave Trac LSD with modified 'nannies'; BMW Euro Intake box; BMW Aluminum Strut Tower bar; ECS front and rear sway bars; 3 stage intake with BPC software; BMW style 78, 17 x 8" wheels with Bridgestone RE 980AS 225/45-17 tires; Koni Special Active struts/shocks, E9x M3 RTABs.
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02-14-2020, 10:27 AM | #7 | |
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02-14-2020, 12:47 PM | #8 | |
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02-15-2020, 04:10 PM | #9 |
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My indy expressed concern that doing coding to the 'sport' brake setting might affect the tune. I'm looking for definitive information that the brake coding is not going to affect the tune. I recall reading that the sport setting will allow more fluid pressure before the ABS kicks in, I believe.
Corrections to the information I have would be welcome!
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E9x M3 front & rear suspension arms; BMW Performance brakes upgraded to drilled rotors in rear; BMW performance shifter; BMW Performance Exhaust; Wave Trac LSD with modified 'nannies'; BMW Euro Intake box; BMW Aluminum Strut Tower bar; ECS front and rear sway bars; 3 stage intake with BPC software; BMW style 78, 17 x 8" wheels with Bridgestone RE 980AS 225/45-17 tires; Koni Special Active struts/shocks, E9x M3 RTABs.
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02-15-2020, 10:32 PM | #10 | |
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02-15-2020, 10:52 PM | #11 | |
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2012 BMW 328i 6-Speed Wagon | Deep Sea Blue with Grey Dakota Leather | Manual Swap, 330i Intake + Tune, 3.15 Helical LSD, Öhlins R&T
(SOLD) 2009 BMW 128i 6-Speed Coupé | Monaco Blue with Black Sensatec | chris_flies' 128i thread |
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02-17-2020, 09:58 AM | #12 |
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Thank you very much, Suprgnat and Chris! Does changing the setting really affect braking performance that I would notice?
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E9x M3 front & rear suspension arms; BMW Performance brakes upgraded to drilled rotors in rear; BMW performance shifter; BMW Performance Exhaust; Wave Trac LSD with modified 'nannies'; BMW Euro Intake box; BMW Aluminum Strut Tower bar; ECS front and rear sway bars; 3 stage intake with BPC software; BMW style 78, 17 x 8" wheels with Bridgestone RE 980AS 225/45-17 tires; Koni Special Active struts/shocks, E9x M3 RTABs.
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02-17-2020, 10:05 AM | #13 |
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I did too many other brake coding changes at the same time to isolate any one thing.
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