EKB18BPR3

whats the difference in performance between regular single spring coilovers like the ground control and one with the helper spring coilovers like the weapon-r?

Takeoff

One has one spring and the other has two

EKB18BPR3

i know that....like said in my question..the performance difference is what im after

batibot

i guess the name says it all....

spoon_ek9

the helper spring wont give u any performance gain. it will pervent the spring go off the spring seat.

IM ALL BOB

Now when u say it helps control the Main spring from coming off the Spring seat.. this is meant so you don't bottom out the suspension correct? and if it helps from your suspension from bottoming out.. therefore it gives a better overall control of the car to the driver?

JeffS

No.
The purpose of a helper spring IS to keep the spring under pressure so it doesn't come unseated, but this has nothing to do with bottoming out. If your suspension becomes highly unloaded, then the spring can become unseated. When the wheel is loaded again, the spring can bind. Mostly this results in a popping noise as the spring shifts back into place. I would imagine that there's a small performance disadvantage from this shift as well.

That said, there's not many times (on the street) that this would happen. Instances that I can think of when it would...
- you run a large rear swaybar and you pick the inside wheel up off the ground during a hard turn (autocross)
- you jack the car up
- you hit a huge bump/dip/swoop in the road
- you're jumping curbs on a track

There is also a train of thought that says helper springs can sometimes contribute to wheel hop as well... personally, I wouldn't worry about helper springs for most applications.

IM ALL BOB

good Info Jeff thanks