Hey, I've been reading as many suspension threads as possible as I move through my newbie learning curve. I'm contemplating a modest suspension mod, but I'm not sure I yet understand how front vs rear coil stiffness affects handling.

For instance, if I replace my '05 Sedan Sport Susp. with OEM '05 350Z springs, my front coil will stay the same (314), but the rear stiffness will increase dramatically (from 342 to 427). What's the net effect here, other than lowering me about 1"? Am I better off getting springs which will firm up both front and back, like Tein H-Tech 350z's? It appears from the specs that, with the Teins, both front and back coil stiffness would both increase substantially (358/375).

The main thing I'm trying to accomplish is to eliminate the excessive body roll I feel through even moderate cornering. Currently, I feel like I'm sliding off the seat away from the turn. I hate it. I literally have to change my posture when going hard through an on/off ramp. This is no good. So am I on the right track thinking that the right spring stiffness and drop will go a long way toward solving this?

Comments?

-T

 

You should look into swaybars rather than springs if you're wanting to
reduce body roll.

To answer your first question regarding increasing spring rate on the
rears, you will have more oversteer bias which will improving your turning....but the posture will still not be as good as running stiffer
swaybars, plus if you're running stock shocks your car might undulate
over bumps and dips.

 

Although springs will help, I believe that a good set of sways will help you moreso than the springs for your situation.