suspension geometry questions

[hemi43]

Hey all !! I'm just starting a Father & Son project, and would like someone to point me in the right direction as far as the front and rear suspension.
We're building a small off-road buggy and will only be powered by a 14 HP Honda engine.
I'm quite familiar with Ackermann, and have a basic understanding of what needs to be done, but confused about a couple things.I'm looking to have about 8-10 inches of travel.Here's what I need to know;
-caster degrees ?
-how much scrub radius ?
-ideal king pin angle ?
-equal or unequal A-arm?
-Any free software available to figure this out?
Thanks for any replies.
Dan.

I have a few pictures of other "projects" I've done here. www.dantechfabricating.com

[trojan]

-caster degrees ?

6-16. the more caster the more steering effort

-how much scrub radius ?

~ 25-40mm, none will give you no feel, too much will increase steering effort

-ideal king pin angle ?

more of a grey area. your limits are defined by scrub radius, the arms, the brakes etc. the more you have the (combined with caster) more your wheels will "flop" over when turning, which is a good thing. the longer you make the stub, to get more kpi, the weaker the upright is inherently.

-equal or unequal A-arm?

Unequal. gives you progressive camber change during compression. It's a very good thing, offroad.

-Any free software available to figure this out?

http://www.racingaspirations.com/?p=286

[hemi43]

Thanks Trojan ;
That info really helps me out !!
I wasn't quite sure about the unequal length A-arms. dan