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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > LSD and MPG



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      08-08-2008, 01:08 AM   #1
McLuVan
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LSD and MPG

would an lsd lower ones mpg's?
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      08-08-2008, 01:16 AM   #2
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o_o
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      08-08-2008, 05:14 AM   #3
McLuVan
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alrighty................
I see how it is
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      08-08-2008, 07:37 AM   #4
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      08-08-2008, 07:40 AM   #5
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Why would you think that?
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      08-08-2008, 08:03 AM   #6
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Quote:
Originally Posted by McLuVan View Post
would an lsd lower ones mpg's?
A recent TV show proved that people "driving under the influence" use much more gas than sober people, so I guess the answer is "yes".

Last edited by WilyB; 08-08-2008 at 08:25 AM..
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      08-08-2008, 08:10 AM   #7
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Quote:
Originally Posted by WilyB View Post
A recent TV show proved that people "driving under the influence" use much more gas than sober people, so i guess the answer is "yes".
Not only that, it's illegal!

Actually, if a LSD is generating any kind of additional friction, heat, over a standard diff, then you are wasting more energy. So if you are always going around turns, its possible that you will be wasting more energy with a LSD. I don't know if it is quantifiable for the average driver though. On my M-Diff, it used a hydraulic pump to increase clutch pressure as it sensed one wheel spinning too much.
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      08-08-2008, 08:38 AM   #8
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The Quaife is an automatic gear-operated Torque Biasing differential. It operates just like your standard open-diff in normal driving.
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      08-09-2008, 03:04 AM   #9
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Quote:
Originally Posted by Magna3 View Post
The Quaife is an automatic gear-operated Torque Biasing differential. It operates just like your standard open-diff in normal driving.
oh
thanks man
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      08-09-2008, 03:05 AM   #10
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Quote:
Originally Posted by hotrod182 View Post
Not only that, it's illegal!

Actually, if a LSD is generating any kind of additional friction, heat, over a standard diff, then you are wasting more energy. So if you are always going around turns, its possible that you will be wasting more energy with a LSD. I don't know if it is quantifiable for the average driver though. On my M-Diff, it used a hydraulic pump to increase clutch pressure as it sensed one wheel spinning too much.
yeah
because I know a lot of ///M3 owners were getting worse mpg with the 4.10 upgrade
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      08-09-2008, 07:12 AM   #11
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You will use similar amounts of fuel.

You will burn more tyres as it's so much fun.

You will save on rear brake pads if you turn off dsc.
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      08-09-2008, 08:03 AM   #12
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Quote:
Originally Posted by WilyB View Post
A recent TV show proved that people "driving under the influence" use much more gas than sober people, so I guess the answer is "yes".
The trails from the other vehicles headlines might look cool but would make it difficult with trying to stay on the road.
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      08-09-2008, 08:04 AM   #13
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Quote:
Originally Posted by McLuVan View Post
yeah
because I know a lot of ///M3 owners were getting worse mpg with the 4.10 upgrade
That would be due to the increased revs they were running at the same road speed.
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