vids!!

 

bumpbump..

 

We took extreme care during installation that the rear diff was shimmed properly. It was strange to get so much noise with one fluid and none with the other, particularly since M. Daddio was running the Shockproof heavy without a problem.

On the EvoX, it's only used for around town cruising to work and back so I can't comment about the performance difference of AYC.

 

i took your suggestion and ran the factory diaqueen and had the exact same experience. monster chattering sound vanished as i pulled it out of the driveway. Shockproof heavy and motul both failed at keeping it quiet.

 

Did you notice a reduction in lock up at the track?

mine is making hella noise with the diff bushings now.

 

My TRE still makes noise, not bad, but it does.


I think it's just telling me it's still working.

 

edit

 

I will be sending my rear diff out to shep once the winter comes around.

$350 + shipping for a 1.5 way rear diff rebuild upgrade... can't argue with that

Also, kyooch I thought the Gruppe-S ACD ECU flash was only to change the characteristics of the Active Center Differential, not the rear diff like you mentioned in an earlier post

 

will the center diff controller will determine when the power is sent to the rear diff... so it does effect how the rear diff works due to WHEN it gets the power.

 

nice -

i think earlier i was just positing that if the acd locks the rear more aggressively, the rear diff will have more torque to disperse between the wheels, and so perhaps more to the outside wheel. not based on anything factual, just using "logic" - i'm really a complete layman when it comes to how the diffs actually work

 

yea, this lol

the more locking torque thing is just a total guess on my end

 

The acd controlls the center diff lock up by adjusting its pressure. The ACD reflash increases this pressure across the maps to lock up the center diff sooner and more quickly. (so more steering angle and less throttle to lock up diff.... and when it does...it doesn't slowly increase the ACD line pressure...it does it in a hurry.

I noticed the difference from the ACD reflash the most when I had too much rear grip. I would have to wack the throttle hard to get the back to rotate.

Now with a proper alignment for the car... its tied to the pedal.

IDK if anyone is sharing this...but I'm running less than -0.8 degrees of camber in the rear with zero toe. I find that the rear has too much grip @ -1.5 degrees or more and makes the car understeer really badly.

 

Have you tried a touch of toe out in the rear say 1/32 total toe out? I d be interested in hearing about that. I would not recommend that for high speed trackwork though.

I agree with the statement 1.5 neg camber is too much in the rear. Mines is set at -1 with zero toe now. And I backed off the 25mm progress adjustable bar to full soft. Car just works better IMHO

 

I'm running about 1.4 degrees of camber in the rear - i was under the impression this figure is pretty much fixed with the stock setup if i want zero toe?

 

You have two adjustments to adjust camber and toe...and like most adjustments they are not independent, but linked together.

-1.4 is too much camber in the rear from my experience.

I ran toe out in the back...its a handfull on the freeway especially with ruts. It doesn't really help the car turn IMO...it just makes it wander and be unstable. Less camber is more predictable IMO.