I got my hands on a set of jdm cusco zero-2 coilvers and to be honest i have no clue on how to adjust them for drifting purposes. So far i have setting 2 in front and 3 in rear. But would like to do more like adjusting spring. But really dont know what will happen if i make the coil tighter...... Any help?!?!?!!?!?

 

tightening the spring perch will preload the spring and raise the car... and make that corner a little stiffer.
drooping the spring by lowering the spring perch will lower the car.

it is recommended that you set the spring perch such that the spring is not loose, and alter ride height by the shock bracket only. set the ride height on all four corners relatively even and then get an alignment.

if you want to set up your stuff properly, set the ride height on all four corners relatively even, get the car corner weighed and then get an alignment.

 

what is "corner weighed"?

 

http://www.grmotorsports.com/news/01...er-weights.php

 

why do you want to adjust it? do you not like how the car is responding?
before you adjust it, you need to drive the car how it is, and realize how you want the handling characteristics to change.

also, if you want to do a really good job, then, like the other guy said, get the car corner weighted.
otherwise, just mearsure it so the ride height is where you want it, and then get an alignment.