I will be getting my 12plate in a few days & I can contribute to this as well.

btw, i have an extra rear diff for sale, if anyone wants to buy it, send it in to be upgraded = no down time, then sell the unit out of your car..... no down-time!!

I am so looking forward to some corner exit rotation out of my car!!

 

I did this mod myself, and had the car out today for the first time and wow. Huge difference.

Powersliding an Evo with power on and your *** out feels so wrong.... but a GOOD wrong

 

It's that big of a difference? You can actually feel the rear stepping out a tad?

I'm really interested in this, just wondered what it's really like.

 

You used Shep's service, or setup the rear end yourself?

 

I've got Shep's rear diff mod. And if I weren't running Hoosiers; that answer would be a yes.

To another degree, the IX (or any model with ACD I assume) you can kick out from the factory, but it will almost immediately redistribute power around and it'll come back in. With the rear diff mod, you can keep it hanging out and actually steer the car some with your right foot.

 

How beneficial is this for small courses, like autocross? Sliding the rear end out sounds good for big open road courses, but when turns come up chaotic-ly, how does it react? Does sliding rear end translate into faster times? I'm thinking about doing this. For one, if I do this, I think I can soften the rear swaybar and add more negative camber to the rear wheels again. More traction everywhere should equal faster times? Is my thinking right?

 

^^ Agreed.

I think it'd be very valuable on an Autocross course. Where you would not longer have to man-handle and/or trick the car to force it to rotate.

It's not tail-happy by any means. I first ran it on a track in the rain with street tires. Never once felt the car was going to spin and I was just having fun holding a 4-wheel drift through the exits! There should be some vid earlier in this thread.


Here's another vid showing how much the rear tires are working now:
http://www.youtube.com/watch?v=v53balkxr0U

 

How low of rpms can you induce the oversteer?

 

Thoe99, depends on steering angle and other settings on your camber/toe/rear sway bar... mine seems to hit with peak boost, progressive and controllable, this is with the STU legal build.

 

You mention it's progressive and controllable. My boost hits pretty hard, so does should I expect it to snap oversteer?

 

^^ There is no snap oversteer.

I'm pumping out near 370whp. On 245 street tires - in the rain; nothing is snap.

This will NOT make your car a RWD oversteering monster. You'll definitely still know and feel the front tires biting and pulling. It just allows the rear to lock a little quicker and stay locked - you jsut provide a bit of countersteer and keep the right foot planted and you go.

If you want my videos from the previous page you'll understand....

 

Thoe - mine is in STU trim, so stock boost, mostly stock parts (Power wise) aside from TBE and a tune... yeah there is no snap oversteer, providing the setup is correct. basicly I noticed a stronger corner exit, that allows you to unwind your steering input sooner/quicker so you have maximum power pulling you forward. (and with that reduced steering angle on corner exit, the front end doesn't wash away like they are known for in stock and ST trim)

 

Ugh, look at all that runoff room! I'm so jealous. All we have in New England are walls right in your face.

 

lol. Then come to the Midwest!

That particular track was in Michigan.

 

Road racing looks so fun.