Driven5 wrote:
I'm pretty sure I have posted this ChassisCalcsPublic spreadsheet as an attachment before, but for the life of me can't find the thread it's in. So I'll just post it here again too. I did not create it, but have referenced others to it a few times over the years. It should be a good way to roughly get into the right ballpark. The general claim is that the Lateral Load Transfer Distribution (LLTD) should be biased ~5% more to the front than the weight distribution, for a slight inherent understeer. Of course, this notion operates under a number of general (all else equal) assumptions, not the least of which would be the tire width stagger should also roughly match the weight distribution. So if you're running the same size tires all around with a front weight bias, you'll already have inherent understeer from that as well.
Thanks, I'll check it out. Been meaning to measure the control arms and sway ars and others things to try these clacs. Its AWD so im pretty stuck on same size all around. For now its 245/40/18 since thats what i had on Forester. In the future though i may go to a 265 on 17" wheels.