I have a V6 and aftermarket plate bumper, icon coilovers 650# springs ride great. My understanding, even with the V8, you should only run the 700# if you have lots of armor. Say plate bumper, winch and skids. Maybe the V8 guys will shut me up lol.
I have run both springs in mine. I was planning to get an aftermarket front bumper with winch. I have the V8 with a full skid package. Even without the front bumper and winch, I thought they were a little too stiff. So basically unless you have a lot of weight like others have said I would stick with the 650lb.
I have 600# springs on my Fox ISP's, front bumper, no skid (yet), and no winch. About perfect now, and expect a little sag with the skid install in the next week or so. To cover yourself, i'd go with 650lb'ers. V8 all the way! :cheers:
I have 700 pound springs and no regrets, rides like a cloud. That said, I have never had the sway bar on with these springs. If I put it on with the preload that I have I'm sure it would be a little different.
V6, Full steel armor/skids/sliders/front bumper/winch. 5200lbs SR5 T4R.
Had the front 660lbs fjc moog coils.
Fine on the street, would slam to the bumpstops offroad.
Loving the new Elka's with 700lbs.
More stable, less nose dive, no slam to the bumps.
No front sway bar.