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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > does the 335Xi have the option to be RWD like an STI?



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      11-26-2010, 03:03 PM   #133
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Quote:
Originally Posted by ********* View Post
^ Yea, clearing codes isn't my concern. It's people flipping the switch when the car is running, possibly damaging the diff/xDrive system.
Yeah, thats no biggie.... As long as the driver turns the car off, hits the switch and turns the car back on. Should take no more than 30 seconds.
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      11-28-2010, 02:14 AM   #134
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subscribing. also it might be a good idea to post this on n54tech or in a separate sub-forum to catch the attention of all the interested xdrive owners, as not many make it all the way to the xdrive forum.
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      12-03-2010, 01:54 PM   #135
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If you pull the fuse for say a nice couple rounds of RWD fun and put it back in does everything go back to how it use to be like the dash not looking like a Christmas tree and speedo working again fully?
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      12-03-2010, 03:19 PM   #136
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Quote:
Originally Posted by Pseudo Nim View Post
I'm curious - since "normally" the car doesn't put more than 60% torque to the back wheels, is it possible that when you do the fuse trick, it doesn't send 100% of the power to the back? Just wondering - clearly I don't know anything about it.
I thought so too until I took it out for a spin. The powers there all right.

The engine keeps the same power flowing, with the diffs and clutches taking care of distribution. With an interfering module (that would normally send the power to the front) disabled, the power has to go to the rear, as the front driveshaft is connected to the rest of the system, not the system connected to the front driveshaft.
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      12-03-2010, 03:21 PM   #137
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Quote:
Originally Posted by MusclezMarinara View Post
Does the odometer work? i did this to my cayenne and the odometer stopped lol
also made a switch for the cayenne
Odo stops working.

Quote:
Originally Posted by besfort View Post
If you pull the fuse for say a nice couple rounds of RWD fun and put it back in does everything go back to how it use to be like the dash not looking like a Christmas tree and speedo working again fully?
Everything normal. You may have a check engine light for the first few starts, but will eventually go away.

Keep in mind, the faults get logged.
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      12-05-2010, 12:23 AM   #138
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Quote:
Originally Posted by issabmw View Post
Quote:
Originally Posted by MusclezMarinara View Post
Does the odometer work? i did this to my cayenne and the odometer stopped lol
also made a switch for the cayenne
Odo stops working.

Quote:
Originally Posted by besfort View Post
If you pull the fuse for say a nice couple rounds of RWD fun and put it back in does everything go back to how it use to be like the dash not looking like a Christmas tree and speedo working again fully?
Everything normal. You may have a check engine light for the first few starts, but will eventually go away.

Keep in mind, the faults get logged.
Are the faults anything to be concerned with service saying anything?
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      12-05-2010, 12:03 PM   #139
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Quote:
Originally Posted by Mthusiast View Post
Are the faults anything to be concerned with service saying anything?
Yea who cares, tell them the fuse keeps going out and you keep replacing it

Just be like it has someting to do with the circuit.
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      12-05-2010, 01:19 PM   #140
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Quote:
Originally Posted by TheRox View Post
Yea who cares, tell them the fuse keeps going out and you keep replacing it

Just be like it has someting to do with the circuit.
This. Or...

Act like you dont know what an engine is and they wont suspect a thing.
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      12-05-2010, 01:57 PM   #141
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Quote:
Originally Posted by Mthusiast View Post
Are the faults anything to be concerned with service saying anything?
I'll check with the OBD tool and post what it says
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      12-08-2010, 08:41 PM   #142
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im still kind of hesitant on this mostly because you guys are all 335s and i'm a lonely 328 but id love to have this work for me too. any light on if the fuses are the same for both??
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      12-08-2010, 08:47 PM   #143
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Quote:
Originally Posted by sk8board511 View Post
im still kind of hesitant on this mostly because you guys are all 335s and i'm a lonely 328 but id love to have this work for me too. any light on if the fuses are the same for both??
I did it on my 330 and I believe the person who found the fuse for us N52s, had a 328.

Fuse #20 on N52s, 26 on N54s
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      12-09-2010, 01:10 AM   #144
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thanks im going to try it tomorrow well today...
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      12-09-2010, 02:06 AM   #145
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Originally Posted by sk8board511 View Post
im still kind of hesitant on this mostly because you guys are all 335s and i'm a lonely 328 but id love to have this work for me too. any light on if the fuses are the same for both??
I did it on my 2008 328xi coupe AT.. It's been snowing lately and let me just say, awesome.. Pull fuse 26 behind the glove box(5amp) and ur good to go. Mileage does not get logged, wipers are going and everything goes back to normal after a few starts and miles... Have fun!
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      12-09-2010, 10:40 AM   #146
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I haven't read through this whole thread, but on BMW's website they state the following that X-Drive can switch 100% to any axle

"The BMW all-wheel drive system, xDrive, ensures your BMW has the best possible traction at all times, enhancing agility and keeping you safely on track, even on fast bends.

xDrive is the permanent all-wheel drive system from BMW: under normal circumstances, it distributes driver power between the front and rear axles in a 40:60 ratio, and changes this figure variably when the road surface or overall driving conditions change.
Acting virtually instantaneously and a manner so subtle as to be go virtually unnoticed by the vehicle's occupants, xDrive can direct up to 100% of drive forces to one axle. Enabling the driver to start up effortlessly even on slippery surfaces or steep hills, xDrive routes all power to the axles with the greatest traction. When parking, the system reacts to the need for high manoeuvrability at low speed by opening the clutch completely so the powertrain functions optimally.
At the first sign of understeering, drive power to the front axle is reduced. If oversteering is detected, xDrive directs more power to the front axle. Thanks to this dynamic redistribution of power, vehicle stability returns to normal even before the driver notices anything amiss.
Driving on a winding road or taking a fast bend in dynamic style is particularly enjoyable with xDrive: you feel as if your BMW is being guided along the curve. xDrive ensures that none of drive power is wasted on a loss of traction: every kilowatt of power is effectively brought to bear on the road.
xDrive is regulated by Dynamic Stability Control (DSC) and uses information from the latter system’s sensors to monitor road conditions. In addition, brake force courtesy of DSC is used when there is traction difference between the two sides of the vehicle and wheel spin is likely."
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      12-09-2010, 12:53 PM   #147
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Quote:
Originally Posted by Duncanp64 View Post
I haven't read through this whole thread, but on BMW's website they state the following that X-Drive can switch 100% to any axle

"The BMW all-wheel drive system, xDrive, ensures your BMW has the best possible traction at all times, enhancing agility and keeping you safely on track, even on fast bends.

xDrive is the permanent all-wheel drive system from BMW: under normal circumstances, it distributes driver power between the front and rear axles in a 40:60 ratio, and changes this figure variably when the road surface or overall driving conditions change.
Acting virtually instantaneously and a manner so subtle as to be go virtually unnoticed by the vehicle's occupants, xDrive can direct up to 100% of drive forces to one axle. Enabling the driver to start up effortlessly even on slippery surfaces or steep hills, xDrive routes all power to the axles with the greatest traction. When parking, the system reacts to the need for high manoeuvrability at low speed by opening the clutch completely so the powertrain functions optimally.
At the first sign of understeering, drive power to the front axle is reduced. If oversteering is detected, xDrive directs more power to the front axle. Thanks to this dynamic redistribution of power, vehicle stability returns to normal even before the driver notices anything amiss.
Driving on a winding road or taking a fast bend in dynamic style is particularly enjoyable with xDrive: you feel as if your BMW is being guided along the curve. xDrive ensures that none of drive power is wasted on a loss of traction: every kilowatt of power is effectively brought to bear on the road.
xDrive is regulated by Dynamic Stability Control (DSC) and uses information from the latter systemís sensors to monitor road conditions. In addition, brake force courtesy of DSC is used when there is traction difference between the two sides of the vehicle and wheel spin is likely."
Good find

Very useful info, and by the looks of it, its correct.
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      12-09-2010, 01:01 PM   #148
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Quote:
Originally Posted by sk8board511 View Post
im still kind of hesitant on this mostly because you guys are all 335s and i'm a lonely 328 but id love to have this work for me too. any light on if the fuses are the same for both??
It was tested on the N52 first, read first pages

Quote:
Originally Posted by ********* View Post
I did it on my 330 and I believe the person who found the fuse for us N52s, had a 328.

Fuse #20 on N52s, 26 on N54s
this
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      12-09-2010, 07:36 PM   #149
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bump, any word on how to handle the wipers?
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      12-09-2010, 09:46 PM   #150
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how much more weight is in the 335ix vs 3351
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      12-10-2010, 09:53 AM   #151
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Quote:
Originally Posted by pakrat View Post
how much more weight is in the 335ix vs 335i
Weights (2011):

e92 335i: 3560 lbs. Distribution 51.2/48.9 % (front/rear MT)
e92 335is: 3571 lbs. Distribution 50.9/49.1 % (front/rear MT)
e92 335i xdrive: 3582 lbs. Distribution 52.2/47.8 (front/rear MT)

So the xdrive version is 22 lbs heavier than the rwd version (335i). Interestingly the 335is is exactly in between at 11 lbs heavier that the 335i.

I don't want to start any war here, but to me its negligible...How about a 182 lbs driver in a 335i versus to a 160 lbs driver in a 335xi... In fact it would also influence the weight distribution to the point of probably being exactly the same for both cars...
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      12-10-2010, 11:30 AM   #152
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I'm loving the look of this thus far.
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      12-10-2010, 12:45 PM   #153
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Quote:
Originally Posted by Kalud View Post
Weights (2011):

e92 335i: 3560 lbs. Distribution 51.2/48.9 % (front/rear MT)
e92 335is: 3571 lbs. Distribution 50.9/49.1 % (front/rear MT)
e92 335i xdrive: 3582 lbs. Distribution 52.2/47.8 (front/rear MT)

So the xdrive version is 22 lbs heavier than the rwd version (335i). Interestingly the 335is is exactly in between at 11 lbs heavier that the 335i.

I don't want to start any war here, but to me its negligible...How about a 182 lbs driver in a 335i versus to a 160 lbs driver in a 335xi... In fact it would also influence the weight distribution to the point of probably being exactly the same for both cars...
Actually that is an error on the BMW site. The weight difference is a lot more. Check out the difference in weight between the sedan versions and you will see it is closer to a 200 lbs difference that the Xi drive train adds to a car.
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      12-19-2010, 11:11 PM   #154
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Curb weight delta ~200lb.

Nikolas has it right... Delta is significant and quite noticeable to the enthusiast driver in back-to-back drives from a braking and cornering perspective. No e9x variant is what i would call "lightweight", of course... it's all relative...
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