this seems to be the problem with most coil over systems. the bouncing effect is caused by too stiff a spring and/or not enough damping. specifically rebound damping. these cheap ass (relatively) chinese/japanese (and possibly korean) dampers' valving are proportioned all wrong. they are balanced more towards compression than rebound damping.
think about it. when a wheel hits a bump, you want the spring to absorb the energy by compressing. thats what its made to do. if you throw a damper in the mix that resists compressing, it makes the impact that much harder on the car, thus the occupants get jostled.
what we need for a better ride on the street is a damper that easily compresses but is difficult to extend thus reducing the rebound effect (bounce).
in my limited experience, KONI and BILSTEIN are the best, reasonably priced, dampers for a street machine. problem is, they don't have an application for our cars yet.
it's the "porpoising effect" that makes the ride feel a little too stiff. it comes from the rear being under damped on rebound. maybe the rear springs are too high a rate. i think the cheapest fix we have is to replace the 280 LB Meagan Racing rear springs with the 180 LB drop coil rear spring from ROAD MAGNET. i would include the eibach prokit rears but have no experience with them on this car, only the SE-R. you guys that may be upgrading from prokits to coilovers may think about keeping them for future use
I may be calling RM soon to see if i can get just the rears. haha, maybe my old ones, for cheap. and probably throw a rear swaybar into the mix to help balance the rear suspension. here's an old article from back in the day. a lot of it still holds true for fwd cars in general.
http://se-r.net/car_info/suspension_tuning.html
happy reading.
nice car, btw
My Forte ;)
coil over thoughts
