One other question I have is whether the ACD and or AYC maps take both braking and throttle into account. There's a huge difference (to me) between pure braking and braking with throttle (as in: left-foot while still on the gas). Do the maps in the OE controller have both of these as variables? If they don't, then I'd say that the OE controller needs to be tossed. Or maybe someone can convince me that LFBing isn't all that special, after all.

 

AYC map is pure steering vs throttle..

ACD maps take into account speed vs throttle, AND speed vs. G force, with separate maps for acceleration and deceleration.

 

So, a reprogrammed OE controller might be OK for the ACD, but the AYC is just never going to help on gravel. Great. (That was sarcastic.)

So why, exactly, did I pay the extra $10k for an X? (That was rhetorical.)

 

Actually, I think that is for you to try..

You might experiment with the ayc map...

 

Oh, I will. I am also adding toggle switches to the harness, so I can disable the AYC on back-to-back runs on the same (closed) road.

Given what you said, I don't worry too much about LFB entry. Some rear-wheel speed difference to the outside should be fine; in fact, it should help. What I worry about is mid-corner, on the gas, sawing from counter-steer to straight. My understanding of the maps is that, when in a counter-steer, I'll have the speed difference in the rear to the inside wheel; then when I straighten back out, the AYC will shut off. This could be wildly unpredictable and could easily explain why the car seemed better with the pump dead. The toggles will let me also try keeping the ACD but deleting the AYC.

And before you ask, yes, the ASC was in off/off, so the problem wasn't single-wheel braking.

With all that said - and keep in mind my limited experience on gravel - the X seems a whole lot twitchier in general than WRXs and Evo 8s (the other two cars that I've driven). The X just seems to want to waggle all the time, which, if I get use to, might be nice