Copied over from the suspension thread....
Did a little testing on Sunday. Hmmm....
No ABS interference that I could detect. My test comprised of taking the OEM size rear wheel/tire that I have extra, and putting them on the front. So....with a 225-45-17 on the front on a 7.5" rear wheel, and 235-45-17 on rear (same size rear wheel), I could not detect the ABS doing anything funky. I did some typical autocrossy type stuff, then a very high speed threshold brake zone on a slight bend.
Now, the type of tires were pretty different in that their grip levels were a lot less than the rears, and I could easily get some minor lock up in the front, but the ABS was pretty aggressive and allowed a fair amount of scrub. (The way I like it) Could not induce ice mode. I'm not sure this car has an Ice Mode.
There was rubbing up front, as mentioned there would be, but......most of the rubbing was on the fender liners, and under the spot where it was rubbing, the liner was quite far away from the structure itself. Like a "bubble" in the liner that was being rubbed, but not any actual bodywork. If I removed the liners, there would likely be no rubbing. There was some inside rubbing at full lock too, but during my little test I decided that this amount of lock would rarely be seen at an autocross. This type of rubbing was harmless.
So....I am still considering this setup closely. My problem is that I STILL cannot find front wheels. I never imagined I would have this much trouble. May have to get creative with spacers and a different offset wheel.
Anyway, wanted to report back about the ABS.....I'm not where this information came from, but real life testing so far says there is not foundation to it. Comments?