[TrustButVerify]

Any options for bigger brakes on the AH3? I have a good feeling the answer is no being that is has a regenerative braking system.

[afranke]

I'll let you know for sure this week when my rotors come in. I think it should be fine with just the rotors and calipers, as the stock rotors and caliper part numbers are listed for multiple cars:

http://www.realoem.com/bmw/enUS/show...diagId=34_1949

http://www.realoem.com/bmw/enUS/show...12#34116799469

As far as I'm aware, the only change the hybrid really adds is the torque converter and the battery (http://www.realoem.com/bmw/enUS/show...diagId=24_1354). The regeneration happens in the electric motor:

"This is really what the regen mode is all about. With the electronic throttle closed and the vehicle still moving, all of its kinetic energy can be captured to both slow the vehicle and recharge its battery. As the onboard computer signals the battery to stop sending electricity (via the controller relay) and start receiving it (through a charge controller), the M/G simultaneously stops receiving electricity for powering the vehicle and starts sending current back to the battery for charging."

http://alternativefuels.about.com/od...genbraking.htm

[afranke]

Yeah, even the BMW retrofit is listed for the AH3, so really anything that fits the F30 in general should work: http://www.realoem.com/bmw/enUS/show...diagId=03_0108

[Lancelot]

I have the M performance BBK, mounted by BMW dealer.

[Kabrich]

Originally Posted by TrustButVerify

Any options for bigger brakes on the AH3? I have a good feeling the answer is no being that is has a regenerative braking system.

I added Brembo GT BBK and rotors to mine this past week.

[Lancelot]

Pictures?

[Kabrich]

Originally Posted by Lancelot

Pictures?

Here they are with my SportContact 6 - probably the only SC6 on a BMW in the USA.

[Lancelot]

Nice! How's the braking feel?
I like your wheels too, which ones are they?

[Kabrich]

Originally Posted by Lancelot

Nice! How's the braking feel?
I like your wheels too, which ones are they?

OEM 437m wheels.

Honestly, mushy - or not what I expected. I think I need to wait for everything to set properly or code for bigger rotors.

[Lancelot]

Originally Posted by Kabrich

OEM 437m wheels.

Honestly, mushy - or not what I expected. I think I need to wait for everything to set properly or code for bigger rotors.

'Mushy' makes me think of two things
- Brake bleeding not done by the book: IIRC there is an ISTA procedure whereby bleeding is done with assistance of the ABS pump, if not done this way it can feel mushy, I've read several threads on the topic here
One here for instance, mentions DIY but I think many independent shops are also not applying this procedure.
http://f30.bimmerpost.com/forums/sho....php?t=1318401

- Coding: perhaps coding for M performance brakes can improve by telling the ABS that a bigger brake system is present, although that won't match exactly I guess it could be something.

[Kabrich]

Originally Posted by Lancelot

'Mushy' makes me think of two things
- Brake bleeding not done by the book: IIRC there is an ISTA procedure whereby bleeding is done with assistance of the ABS pump, if not done this way it can feel mushy, I've read several threads on the topic here
One here for instance, mentions DIY but I think many independent shops are also not applying this procedure.
http://f30.bimmerpost.com/forums/sho....php?t=1318401

- Coding: perhaps coding for M performance brakes can improve by telling the ABS that a bigger brake system is present, although that won't match exactly I guess it could be something.

They claim they were bleed twice.

No idea if by the book.

: