i made up my mind im going to run coils at all 4 corners of the zuki. my question is how long do the control arms need to be to flex good? any suggestions? any rule of thumb?

anyone?

Generally, the longer the better your suspension will flex. That isn't always the best overall though. All four of my rear links are the same at about 36". I really can't remember the exact length but it's something like that. Hope that helped at least a little bit:skull:

I think the better question would be 'At what angle should I mount my control arms?'. I run a short armed XJ and wheel a lot with a long armed version (borton's XJ-thing). He has tons of travel in the front, but I can make most of the obstacles that he can (the ones I can't make, I'd attribute to my driver error more than my vehicle setup). I'm running a standard Rubicon Express 'Super Flex' arm setup, and he's running a Currie TJ modified for length, 3 arm arrangement with a limiting strap.

Get them as close to parallel (to your frame) as possible and you'll have good results.

My rears are 36 inches long and I am running a 33 inch tire (until my boss allows for the bigger one). I am running a RE 3.5 rear spring and can easily unseat it with a highlift.

Ride is good and smooth at speed. Flex is probably more than is needed in 99% of the crap I wheel.

Front arms are 32 inches long. One radius arm, one LCA and a Trackbar. Limited only by the shocks.

Front and Rear I am keeping my total travel to about 12 to 14 inches from full compression to full droop. This is seems to be a really good setup for my 107 inch wheelbase (yes I said 107 it is 105 stock and pushed back 2 inches)

My arms are at about EDIT 8* or so. I will go measure for you and edit later.

Long arms are the way to go IMO but lots of guys just use huge drop brackets and wheel everywhere I do.