qa1's coilover spring rate 2wd rcsb
 

hey all

I picked up a pair of GS501's QA1's and need to order springs for them not sure on what # spring to go with? 500? 600? 650? or?

2004 2wd rcsb plans include ls3/4l80e turbo hopefully within the next year have DJM 2" drop arms and a flip kit so probably be 4/6ish drop once all installed

Bob

Depends on your ride height and weight but somewhere in the 650-1000lb range most likely.

how does ride height determine the spring rate?

this is all new to me so trying to figure this all out

Because your ride height determines what shock to use and where in that shocks travel you need to sit to get the static height correct. Then there is the dynamic considerations that also play into getting it right and this depends on what kind of responsivness you want (cushy or sports car like). It is how you decide between, for example, a 200lb spring with 4" of preload or a 800lb spring with 1" of preload. Same static height but very different driving feel.

ok gotcha!

from what i've read the qa1's are going to get me 2" drop and the arms another 2" or at least around that much

as for ride i'd like it to be sporty with out any bump steer or me getting bounced out of the seat lol my last truck was 5/7 and i tried to play with shocks and even swapped front coil springs out but never really found a ride i was happy with it was more like settled, every one raves about the coilovers so thought i've give it a try this time also plan on relocating the rear shocks

Do you know what the corner weight or front axle weight of your truck is? That is important to getting the right spring also. Hard to say on the drop with the shocks, need to know the distance between the mounting points at the ride height you want.

no i dont know the weight as of now, i'll try to get that some time soon

i have some 2" drop springs i guess i could install them and figure out the distance in mounting points

What are you trying to do with the truck?

daily street truck for the most part with some 1320/mexico trips mix in :angel:

I see. I'm gonna give mine a go with 450 lb springs first and see how that goes on the track. I've also got some 350 lb springs. It's not a street truck though, so you'll need to be quiet heavier. Let us know how it works out.