[Mahler9th]

In my experience with my car (racing application), radial tires of course want more negative than bias plys. A lot more.

I am pretty sure that this is an inherent difference (see, e.g., the Puhn book-- an excellent reference).

In my experience, the amount of negative out back can be a trade off around a "sweet spot." A little more and you can go a bit faster, but the tire wear trade off might not be ideal.

So for example with the Goodyear bias plys we used for about a decade, you had more capability at about 1-2.25 negative out back, but somewhere around 0.8 was almost as fast with much better tire wear. Everything else being equal.

When a bunch of us switched to radials, we had to go up to a "radial" camber range. My comrades made the switch before I did and settled in around 2.25 out back with the Hoosier radials. Give a take.

For toe, I have pretty much always used about 1/16 total in out back for all trailing arm Porsches-- never had much reason to fiddle beyond that relatively standard spec. Street, AX or racing application.

For the front I have almost always used about a 1/8 to 1/10 of an inch out.

Again all tires and all applications.

That being said, gotta be careful on longer street drives on the soft comp tires with that much toe out. I remember learning this back in the day when I made the long drive to Buttonwillow.

Buy oh she turned in crisply in AX...