They're standing behind this pull as torque steer. I argued, but all of the things on this thread that I brought up, they seemed to think would cause the pull while not under power as well. If you guys have any ideas I'd like to hear them- I have to go pick it up in a little bit.
"Torque-steer" huh? OK, at first I was going to write that you should dump that shop like the proverbial hot potato. But the symptoms actually seem to fit, now that I think about it.
I am very familiar with this phenomenon (I commute in a front-wheel drive Saab that can put 280 foot pounds through the steering wheels). The 100 by comparison is solid as a rock, it only goes where you point it.
So, if it is indeed torque-steer, then you need to look at what could cause _that_, which in turn may be what is causing the pulling under acceleration. In my experience, torque-steer is really another name for traction-loss. Since the driven wheels are at the front, when you accelerate hard, you get a weight transfer to the rear, _off_ of the driven wheels. Combined with all of the torque you are feeding through those wheels, which now have less contact with the road, plus the fact that they are made to turn (so you can steer), and you get some squirrely behavior from the steering wheel. Most modern FWD cars (including Saabs) have been able to dial most of this out, but you still get it a bit in high-powered front-drivers (like my Saab, or the Acura TL, etc.). This is one reason why racers like rear-wheel drive so much, and why performance marques like BMW M and Mercedes AMG will never build a front wheel drive car. Interestingly, they will also probably never build an all-wheel drive car, either.
Of course, the problem is, why is this happening now, when the 100, despite being fulltime 4WD, actually has quite stable steering and acceleration. It's possible that the "mini-lift" did cause your caster to go out of whack, which would make the steering more sensitive to this effect, though it would also be more squirrely under braking, and you don't indicate that straight-line braking stability has been affected.
So I guess I've said a lot that doesn't help you much, but I think the easiest thing to do right now is undo the AHC lift, put it back to stock, and see what happens. Basically, undo what's changed, and if that doesn't work, then you know at least where the problem is NOT.
