BBK from 335i

TMR · 11-26-2010, 04:06 AM

Will my stoptech BBK from my 335 work on a M3?

elh0102 · 11-26-2010, 08:15 AM

Stoptech or Dave Zechhausen could tell you for sure. I think, if the bias division is the same it should work. If not, they would have to install different size pistons, and you might need different mounting brackets. Since the M3 can accommodate the larger rotors, you would give up a bit of cooling capacity and, I think, clamping leverage, but that's getting beyond my level of understanding.

montreal red · 11-26-2010, 09:38 AM

i believe all you need would be different mounting brackets.

gilbertfg · 11-26-2010, 10:24 PM

What about a bigger master cylinder too!?

montreal red · 11-27-2010, 12:45 AM

Quote:

Originally Posted by gilbertfg

What about a bigger master cylinder too!?

bigger master cylinder? i dont think u need this. if you buy an m3 specific kit, u can use the oem master cylinder. if op is trying to retrofit a bbk from a 335 onto an m3, u wont need a bigger master cylinder either.

elh0102 · 11-27-2010, 06:01 AM

Quote:

Originally Posted by gilbertfg

What about a bigger master cylinder too!?

Shouldn't make any difference if the bias setup is the same. If I understand correctly, this is what determines the appropriate combination of piston sizes.

HP Autosport · 12-02-2010, 01:09 PM

There are a few things that need to be taken into account.

You will need new mounting brackets. You'll have to see if the piston sizes are the same. You'll need to see if the rotors/hats will work on the m3 hub and if they will not obstruct proper mounting of the caliper. Lastly, you'll need to confirm that the master cylinder is indeed the same size and provides the same amount of pressure as the 335. This could great a very hard or soft pedal depending on the variance.

TMR · 12-02-2010, 01:13 PM

Quote:

Originally Posted by HP Autowerks

There are a few things that need to be taken into account.

You will need new mounting brackets. You'll have to see if the piston sizes are the same. You'll need to see if the rotors/hats will work on the m3 hub and if they will not obstruct proper mounting of the caliper. Lastly, you'll need to confirm that the master cylinder is indeed the same size and provides the same amount of pressure as the 335. This could great a very hard or soft pedal depending on the variance.

Thanks for the reply. I called Stoptech and they told me they were completely different kits. So i sold my BBK. I guess i'll roll with stock breaks

11-26-2010, 04:06 AM	#1
TMR Brigadier General 394 Rep 3,161 Posts Drives: M3 Join Date: Jun 2008 Location: Torrance iTrader: (12)	BBK from 335i Will my stoptech BBK from my 335 work on a M3? __________________ 2015 M3 BPM Tuned, Eibach, Magnaflow and more www.tmrmzine.com/m3/f80 SOLD E92 Slēk Carbon Fiber Widebody M3 www.tmrmzine.com/m3/slek/ SOLD E92 335i Stage 3+ with all the toys www.tmrmzine.com/335/ SOLD E39 M5 Modded, What a great car! www.tmrmzine.com/m5/
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11-26-2010, 08:15 AM	#2
elh0102 Captain 15 Rep 751 Posts Drives: 2009 335i coupe Join Date: Apr 2010 Location: USA iTrader: (0)	Stoptech or Dave Zechhausen could tell you for sure. I think, if the bias division is the same it should work. If not, they would have to install different size pistons, and you might need different mounting brackets. Since the M3 can accommodate the larger rotors, you would give up a bit of cooling capacity and, I think, clamping leverage, but that's getting beyond my level of understanding.
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11-26-2010, 09:38 AM	#3
montreal red chris 278 Rep 12,144 Posts Drives: White Boat Join Date: Jun 2007 Location: Toronto iTrader: (31)	i believe all you need would be different mounting brackets. __________________ Current: 2013 F10 M5 & 2016 Mini JCW 2013 GLK350 (gone), 997.1 GT3RS (gone), 2009 WRX STI (gone), e92 M3 (gone)
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11-26-2010, 10:24 PM	#4
gilbertfg Turning wrenches for the USA since 2001! 93 Rep 373 Posts Drives: G80 Join Date: Aug 2006 Location: Mannheim, DE iTrader: (0) Garage List 2023 BMW [0.00]	What about a bigger master cylinder too!?
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12-02-2010, 01:09 PM	#7
HP Autosport Supreme Allied Commander 3886 Rep 54,519 Posts Drives: F80 M3 Join Date: Mar 2007 Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com iTrader: (36)	There are a few things that need to be taken into account. You will need new mounting brackets. You'll have to see if the piston sizes are the same. You'll need to see if the rotors/hats will work on the m3 hub and if they will not obstruct proper mounting of the caliper. Lastly, you'll need to confirm that the master cylinder is indeed the same size and provides the same amount of pressure as the 335. This could great a very hard or soft pedal depending on the variance.
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