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F30 / F31 / F32 / F33 (2012 - current)
The sixth generation 3 series, chassis code F30. 2013 model year 328i and 335i sedans now in production. Read the F30 frequently asked question thread for all your basic question and dive into all the details in the ultimate F30 information thread.

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  #1  
Old 02-04-2012, 08:24 AM
fb88 fb88 is offline
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Any differenence with stop distance between 335 and 328?

Also I assume F30 still doesn't display the psi per tire?
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  #2  
Old 02-04-2012, 08:28 AM
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justinnum1 justinnum1 is offline
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I would imagine similar distances...good question.
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  #3  
Old 02-04-2012, 09:42 AM
calmwinds calmwinds is offline
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I thought I read somewhere that the 335i has bigger brakes. Could be wrong
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Old 02-04-2012, 09:59 AM
david in german david in german is offline
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335 has larger brakes, the advantage is not stopping distance but more brake cooling under harder braking conditions.
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Old 02-04-2012, 10:15 AM
david in german david in german is offline
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http://www.edmunds.com/bmw/3-series/2008/road-test.html

If you read, the 328 is actually better at braking.
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  #6  
Old 02-04-2012, 11:03 AM
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justinnum1 justinnum1 is offline
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Quote:
Originally Posted by david in german View Post
http://www.edmunds.com/bmw/3-series/2008/road-test.html

If you read, the 328 is actually better at braking.
Nice!
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  #7  
Old 02-04-2012, 11:09 AM
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jwac jwac is offline
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Quote:
Originally Posted by david in german View Post
335 has larger brakes, the advantage is not stopping distance but more brake cooling under harder braking conditions.
The F30 335i not only has larger rotors but also larger fixed calipers versus the sliding ones on the 328i. This wasn't the case on the E9x (the '35 just had larger rotors), so I'd expect the braking performance differences to be more pronounced between the two F30's.
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  #8  
Old 02-04-2012, 11:14 AM
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Originally Posted by pyao88 View Post
Also I assume F30 still doesn't display the psi per tire?
Probably not. BMW and many other manufacturers don't do this on purpose because the measured tire pressure of course varies based on temperature. If the software doesn't display a corrected baseline cold inflation pressure which is what you reference on the door post, the driver/user could misinterpret the readings if if they don't understand how it works.

Therefore, a lot of companies like BMW choose to only display a low warning instead of the actual psi.
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  #9  
Old 02-05-2012, 10:46 PM
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By the physics, the 328i is going to stop sooner (lower mass and constant braking power applied up to but before ABS limits you). The test doesn't get interesting until you repeat it 30 times and put heat into the system. The 335i has better braking equipment for dissipating heat and stopping the heavier car. At that point the stopping distances could increase by 50%.
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Old 02-05-2012, 10:59 PM
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I bet it is more dependant on tires than anything else.

The car with the stickier rubber will stop faster, and BMW is supplying All-Season and Summer rubber on the F30...

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  #11  
Old 02-05-2012, 11:30 PM
david in german david in german is offline
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Quote:
Originally Posted by westwest888 View Post
By the physics, the 328i is going to stop sooner (lower mass and constant braking power applied up to but before ABS limits you). The test doesn't get interesting until you repeat it 30 times and put heat into the system. The 335i has better braking equipment for dissipating heat and stopping the heavier car. At that point the stopping distances could increase by 50%.
So, as long as I am not on the track I can consider my 328 the better stopper.
My normal commute is 50 miles one way on the autobahn. I can actually get on the bahn at times and not even touch my brakes till I get ready to exit at the 49 mile point of my drive.
I normally commute in my 118i though, I can see on it the brakes are not the issue but tire traction when it comes to stopping.
This thread actually changed my mind about upgrading to the BMW Performance brakes on my 3 series. I went throught the same thought process when I was thinking about upgrading my Mini Cooper S brakes to the JCW brakes.. I didn't upgrade them either. I did change to TSW rotors and EBC pads. That car would cause your breakfast from the day before to come up if you hit the brakes hard enough.
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