I came across information that to do BBK upgrade, must also bring the car to BMW to update software so to "Sync" the car with new brake system. Is it true?Anyone bro here can confirm this?I am keen on BMW performance brake as I do not want to upsize my rims.Thanks.Qoute"Basically the new set of brakes will have to be recognized by our Bimmer's OBC for:1) Brake pad wear indicator2) DTC sync-ing & calibration"
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Yes its true. I have the Performance brakes fitted, and followed the instructions to re-code the DSC after the install. To me it feels as tho the brake bias was shifted more rearward after the re-code, resulting in better braking stability after the recode.
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I donno about the rest of the BBK kits. The BMW Performance Brake is made by Brembo and has Brembo stamps all over the calipers. Front discs are also brembo, rear discs are made by BMW germany. I donno how it compares to other BBKs as I've never driven an E90 with other brake systems. But Freddie did tell me that the BMW performance brake feel is "very good". He's done a lot of Brembo installs so he should know better than me la.
Here's some blurb on this by Stoptech http://www.stoptech.com/tech_info/wp_brakebiasandperformance.shtml
The most dramatic front-bias impacts are usually brought about by “big brake kits” which are not properly matched to the intended vehicle. Any time that a bigger front rotor is installed, there is a simultaneous need to decrease the effective clamping force of the caliper (installing smaller pistons is the easiest method) to offset the increased torque created by larger rotor effective radius. The objective is to maintain a constant amount of brake corner output (torque) for a given brake line pressure as Figure 6 illustrates. Unfortunately, too many upgrades do not take this factor into account, and those poor cars end up with both bigger rotors and larger pistons which serve to drastically shift the bias even more forward. While rock-solid stable under braking, stopping distances will go up dramatically.
This is exactly the reason why StopTech performs instrumented testing for every single kit and application they develop. You’re not just buying parts – you’re also buying the assurance that the brake bias has been developed and tested to be optimized for your exact application.
Here's some blurb on this by Stoptech http://www.stoptech.com/tech_info/wp_brakebiasandperformance.shtml
The most dramatic front-bias impacts are usually brought about by “big brake kits” which are not properly matched to the intended vehicle. Any time that a bigger front rotor is installed, there is a simultaneous need to decrease the effective clamping force of the caliper (installing smaller pistons is the easiest method) to offset the increased torque created by larger rotor effective radius. The objective is to maintain a constant amount of brake corner output (torque) for a given brake line pressure as Figure 6 illustrates. Unfortunately, too many upgrades do not take this factor into account, and those poor cars end up with both bigger rotors and larger pistons which serve to drastically shift the bias even more forward. While rock-solid stable under braking, stopping distances will go up dramatically.
This is exactly the reason why StopTech performs instrumented testing for every single kit and application they develop. You’re not just buying parts – you’re also buying the assurance that the brake bias has been developed and tested to be optimized for your exact application.
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