has any one heard of this and if so where do i find it i was reading a superstreet magazine and the had a car shootout, they had several events and the had a drift event, there was an sti that did real good in it and the caption said whoever invented the handbrake disconnect for the center diff is amazing. ive been trying to find out about this but no luck

 

Definately on the STI DCCD system and the EVO ACD system, the centre diff unlocks when you hit the handbrake to eliminate stress on the centre diff when performing handbrake turns. (ie. locked rear wheels, rotating front wheels.) I had never thought of doing this for drift, but I guess you could get to the trigger on the handbrake and fool it into thinking the handbrake is applied to open the centre diff. Although that said, I dont believe this provides 100% rear drive, just a bias towards the rear. With the rex it was 65R 35F max bias, and I think the evo VIII was similar but in the IX it has allowed a much more significant rear bias.

 

Incorrect!

 

Then what is correct?

 

The evo is a 50/50 split.

The 3 acd settings modify the lock up rate of the diff that transmits torque to the rear wheels.

the evo in factory form cannot be made rear wheel drive.

 

Ok, it discusses bias. SuperHatch is of the opinion that the system can't send more than 50% of the power to the rear; but he's not completely sure. Plus, ACD may have more of an effect on that power distribution percentage.

However, it doesn't discuss disconnecting the center diff when you grab the handbrake.

So, which part are you referring to is incorrect and what is your conclusive evidence. I'm still confused...

 

Ok, I agree it can't be made rear wheel drive (unless some welding is involved).

And, if the ACD uncouples the center diff when you grab the handbrake, it would make it completely FWD.

 

https://www.evolutionm.net/forums/sh...d.php?t=175195

 

So then technically if you triggered your ebrake just enough so that the light was on, could you do a traditional rwd brakestand?

 

There us ACD tuning available in japan as well as upgraded ACD ECU's as well
http://japanparts.com/db/partslist.p...maker=&volkey=

Ralliart also use to have a center locking diff to make it rear wheel drive on non ACD equipped Evos as well

 

Technically yes if you have the open diff in the front. It is a lot harder to keep the slide though with the helical front diff on the 04 RS and 05+

 

Or Maybe install one of these...


Mitsubishi Centre Diff Controller


MoTeC is proud to announce the release of the MoTeC MDC - Mitsubishi Diff Controller.

MoTeC's Mitsubishi Diff Controller (MDC) replaces the factory fitted Active Centre Diff (ACD) controller. It is a bolt in replacement making use of the factory mounting points.

The MoTeC MDC is suitable for EVO 7, 8 and 9s fitted with the ACD system from the factory. The MDC can be used in cars fitted with the ACD/AYC (Active Yaw Control) but the AYC will be disabled.

There are six selectable control modes, 0%, 100% and four user configurable modes. The control modes can be cycled through using the factory dash mounted ACD button. To prevent unauthorised copying of configuration data, configurations cannot be read out of the MDC.

 

That looks nice,

But you before anyone asks You can't go 100 rwd. The Diff isn't designed for it.

 

Correct. It is percentage of centre diff lock from 0 - 100% not perfcentage of drive front/rear split 0 - 100%