kijima - Thanks a lot for your response. Thatīs the same answer I got from people in Australia.
I donīt want to go off-topic, but how is the manifold on an RS different? Since we have no GSR or MR here to compare it with, I would like to know the difference.

Thanks!

 

as i said before i would give my abs sytem up for the RS

But that will expire soon, I heard my ABS will be gone for good ... soon.....

 

in the older models, that wasn't different. But the turbo itself,the RS transmission, the tune , the MR some cases if im right even had different valving then others exept the RS MR. etc.
I would assume the X RS line will be a same . Also the new 2010 Grupe N cars are lighter some 40 + lbs vs the previous once. Due the lightened up body parts. Example the floor panel.

 

Yes and no.

I'm amazed at what's different and what's stayed the same from the Rs to the road car. It's very different in the X to previous models.

 

I should have answered this sooner...my bad

I've tried Gravel and Snow modes on different surfaces, and they seem to cause slower throttle response and more understeer than Tarmac mode.

So, I've stuck with Tarmac mode for autocross, and turn off the ASC (as much as possible).

 

want to pick the thread up.
anyone solved the initial question? how to activate abs on x rs?

 

Given that an RS doesn't have ABS, it's going to be very difficult.

Open your hood and look at the plumbing on the brake-lines. If you have a real RS, then it goes from the MC to the prop valve to the calipers. No large ABS unit anywhere under the hood.

 

I apologize if it's already been answered, but do you know why they decided not to put ABS on the RS? Cost?

 

The RS was the version meant for people building a race-car ... Open-class or Group N rally-cars in particular. You cannot have an active rear diff under FIA rules, so that's why an RS doesn't have AYC. Nobody runs ABS on gravel, so that's why an RS doesn't have this, either.

 

I looked up the abbreviations, but didn't find AYC in there. I've read it some where, but can't remember what it means. I remember reading the RS being the stripped down model for "race" enthusiasts. Do you know why FIA won't allow active rear diff? What is an active rear diff? Also, ABS on gravel would be counter productive I take it?

 

I cannot explain why the FIA does what it does because it often makes no sense, but they have only allowed one active diff -- the one in the center -- for a long time. The new rules might not allow any active diffs at all; I haven't paid much attention since the switch to two doors and 1.6 liters, but I think I saw something about no more active centers in WRC.

Backing up a step, an active diff is any diff controlled by external devices. Therefore, the AYC (active yaw control) rear diff in USDM Evo Xs and some non-US 9s counts as an active diff, since it is controlled by the same computer that controls the ACD (active center diff). In general, active diffs are more complicated but better, because they can be programmed to do things that internally-activated diffs, such as conventional clutch-plates (aka Salisbury diffs) or helicals, can't do. However, the AYC is not good on gravel, because it can't tell the difference between an on-purpose counter-steer drift and an oh-my-g*d-I'm-gunna-die drift. A conventional diff is what you want in the rear, anyway. This is why the RS doesn't have AYC, but does have ACD.

As to ABS, some rule-sets don't allow it and most rallyists don't want it. So the RS doesn't have that, either.

Even more, most RS cars don't have A/C, a radio, or fancy seats, and come with the legal minimum number of airbags (since they'll be tossed, too). They come with small (pathetic) brakes that aren't even fixed-caliper (because those get tossed, too, in favor of a gravel set-up), although you could order an RS with the large Brembos for tarmac, if you wished.

In summary, it's stripped down to the minimum to make it legal to sell without wasting time and money on stuff that the FIA doesn't allow.

I really wish that I'd found one for myself.

 

Thank you. The thought of having a RS is nice if used for racing, or track driving only like you mentioned. The AYC can't be deactivated though, correct? You can change the traction control from Tarmac, Gravel, Snow, and off though; or am I thinking of something entirely different? Are the RS models hard to find now?

 

You are mixing two issues when you talk about Tarmac, Gravel, and Snow (which are ACD/AYC modes) and traction control. Evo Xs have both Type 1 and Type 2 traction control and then a bunch of fancier ASC stuff. Type 1 is simple throttle-cut when more or more tires spin. Type 2 is when the ECU applies the brakes to individual wheels to prevent tire-spin. The fancier ASC stuff are to correct for over-steer and under-steer, again by applying the brakes to a single wheel. The key point here is that neither traction control nor ASC involves the differentials, while ACD/AYC mode is all about the control of the center and rear differentials.

You are correct that the AYC cannot be deactivated. Well, you can drive around without a pump (as I am), but that also deactivates the ACD. The real options are to have your AYC map reprogrammed to be less aggressive and/or swapping in a medium-locking diff, such as the Cusco RS. Or you can dump the AYC completely and put the rear diff from an Evo 9 in the car. In fact, that's how an RS comes: with the non-AYC diff from a late Evo 8 or USDM Evo 9.

RS models are just about impossible to find in North America. You can get a right-hand-drive from the UK or Japan, but that has some down-sides (beside being expensive). It's hard to get a left-hand-drive RS because the Eastern Europeans bought them all. Evo Xs are the absolute rage in semi-pro rallying in Eastern Europe.

 

So did you completely remove the pump, or just disconnect and cap the lines? What benefit does that provide to you?

AYC mapping is done by a tuning shop, dealership, or either?

 

My pump corroded and died. Happens to lots of Evo Xs. New pump will be put in a different location (inside the trunk). The only benefit is that I've learned a lot by continuing to push it on gravel with an open center and rear. I'm pretty sure that I'll be swapping in a Cusco RS at some point.

AYC mapping is done by specialists only. Dealership can't do it. PDM in Chicago and ACD Tuning in Nashville are two options.