so i have these on my eg hatch and my buddy adjusted the height for me. we put it on the lift and he used the keys to unlock the perch i think thats what they are called and he spun the spring. the spring was going up and he counted 20 threads on each side. my question is by him doing it that way and not taking them off and twisting the bottom did he change the preload ??? and if he did how do i get it back to buddy club specs ?>?

 

yes. You're suppose to adjust them by the shock tube itself. Use the lower perch to adjust. BC says the spring should just be snug so it's not moving up and down.

I haven't found a good asnwer on what or how spring preload works but I'd fix it!

 

So if he spun the spring perches up, that means the springs weren't "captured" to begin with, as they should have been if you have separate ride height and spring preload adjustments on that particular BC suspension.

Spring preload itself really does nothing on a normal street car which may see limited track use. The spring will be loaded pretty close to the same no matter what the preload is. Varying the ride height does shift corner weights around, but the loaded spring height is essentially the same no matter what.

You would have to put a TON of preload on the spring before it really started affecting the ride of the car. I'm talking hundreds of pounds of preload, which would require the spanner wrench to even get that much load on it. If you get too much preload, beside the car sitting much higher than desired most likely, you would run into problems of the tires losing contact with the road much easier over bumps and dips, due to the reduced suspension droop travel. And tires not contacting the road means it's much easier to lose control of the car and crash.

 

Uh oh looks like someone ****ed up!!!!!!!!!!