Originally Posted by Cpt.America

Here is what you need to remember:

25 caster = 0mm bumpsteer
30 caster = 3mm bumpsteer (what I am running now)

You can do the math to figure out how much you will need at 27, 29, 32, etc. If you changed caster but didn't adjust bumpsteer washers to keep the car at 0 bumpsteer, you actually made two changes at once. You will feel the affects of bumpsteer just as much as caster... so your test was inconclusive until you make those change corrections.

There might be a difference in how much B.S. washers you run depending on the angle of your camber link as well, but I haven't tested that. The key is to just make sure you measure your bumpsteer before and after your caster changes to make sure you keep it the same so you aren't making two changes at once.