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      05-02-2018, 04:40 PM   #71
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Drives: 2009 E92 328i 6MT
Join Date: Jun 2017
Location: Boynton Beach, FL... USA

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Originally Posted by atmosphericM View Post
^ It's not just MPG, though. Personally, I don't want to be cruising down the highway at 4000+ RPM. If you drive 70 mph, that's one thing. I'm not that guy.....

Also, Quaife is great. It's like Wavtrac.. soft feeling and maintenance free (unlike clutch-type 2/3 way LSDs). Closest thing to a "stock" LSD as far as feel and maintenance (minus the crappy one-tire-fire performance).
It might not be as bad as you think....

I don’t know how fast you drive but I’m doing 3750rpm at 90mph and would be doing about 3850-3900 at 90mph with 3.91.

If you drive 100mph then yes you will likely be over 4000rpms a lot.