I know these are the two major differentials available. I know of only a few members who have went the Evosport route. A lot more have went with Dinan and there is mixed reviews, some cars have went thru 2, 3, 4 and even 5 different differentials. Any more feedback from owners and anyone switched from Dinan to Evosport or vice versa. I know also Evosport has a few different levels of their differential available also.
__________________ '10 M6 Alpine White RPi (Pulley, RAM Air Kit, Full GT Exhaust), Charcoal Filters removed, Dinan Stg.2 Suspension, 20" HRE 890s w/ Michelin Super Sports, Vorsteiner Front Spoiler & Trunk Lid Spoiler, Luminar Tint
At the time of purchasing the 3.91 diff I had no bias of any kind. I was very early also and there were no complaints out there regarding the Dinan whining issue.
I bought the Evosport diff because, as I was told, Dinan would not sell it to Active Autowerke. They were doing all the work on my M5 at the time of the the mods.
If this is accurate, well those are life's flips and turns.
I am happy for the outcome and the Evosport diff has been a "balls out" performer. Last January when we did a private track rental the M5 did over 25 1/4 mile passes and thank goodness not a single issue handling the stress and added hp.
I congratulate Evosport.
This month we are going back to Moroso.
__________________ 2006 M5 Alpine White/Silverstone : car and project are dead. RIP 2007 GT3RS ORANGE / BLACK 2006 M5 BLACK / BLACK
FORGED IN A FIRE LIT LONG AGO, STAND NEXT TO ME, YOU'LL NEVER STAND ALONE. FIRST IN, LAST OUT. YOU DON'T ALWAYS KNOW WHERE YOU STAND, TILL YOU KNOW THAT YOU WON'T RUN AWAY. YOU HAVE ENEMIES? GOOD. THAT MEANS YOU'VE STOOD UP FOR SOMETHING, SOMETIME IN YOUR LIFE. W. CHURCHILL SOCIALISM IS A PHILOSOPHY OF FAILURE, THE CREED OF IGNORANCE, AND THE GOSPEL OF ENVY, ITS INHERENT VIRTUE IS THE EQUAL SHARING OF MISERY. W.CHURCHILL A wise and frugal gov't, which shall leave men free to regulate their own pursuits of industry and improvement, and shall not take from the mouth of labor the bread it has earned - this is the sum of good gov't. Thomas Jefferson ...
I have the Dinan diff, and yeah, there was a whine at first, but it is gone now...or as some like to say, I have selective hearing. I know a couple things about diffs. First, that if you make slant cut gears, you can get rid of the whine. However, slant cut gears are not as strong as straight cut gears...which whine more. So...my conclusion is that Dinan's must be cut more straight than E.S.'s I don't know if that's true or not, but I'm gonna go ahead and make that assumption.
How did your clutch hold up? If I may ask.....how many times have you used launch control? Just wondering as I hear widely varying opinions on how often you can use it before you may experience significant wear on the clutch....
Anyone have any figures for the actual performance improvement from fitting the 3.91 diff. 0-60, 1/4 mile,? Simon Atik mentioned an improvement of about 0.2 seconds on each figure but it would be interesting to hear from someone who has actually documented this.