cinaibur

Hey guys. I've been on my tein coilovers for 3 years and 50k miles. I'm honestly considering taking the car back to stock. The ride is killing me right now. The ride quality is fine 98% of the time. Bumps at high speeds feel only slightly stiffer than stock, but the dips are killing me. If I hit anything, that I would describe as an inverted speed bump, it's like driving off a cliff. It sounds like it's going to shatter my carbon hardtop. It didn't used to be so bad, but it has gotten worse. I've gotten under the car, and don't see any leaks on the coilovers and they still rebound like they should, so I don't think they're blown. The car drives dramatically different with the hardtop off, but that can't be the only thing going on. Has anybody experienced something like this?

cinaibur

Been doing a little research and I'm thinking about installing helper/assist springs.

//steve\\

You're probably bottoming out the shocks on those big dips.

cinaibur

No, it isn't bottoming out. Once every few months I hit a big dip and the struts bottom out. When That happens, it scrapes the hell out of the fender liners. It doesn't scrape the fender liners when I hit these "inverted speed bumps". From the searching I've been doing, it appears that I'm low enough that I don't have the correct preload. So when The ground drops out from under me, I don't have enough rebound to maintain traction. I'm only having this issue in the front, so I'm going to take some measurements and see if 60mm helpers will fill the gap between my springs and the perches.

alphalanos

So you think the spring is coming loose when you are hitting the dips. If thats true you need to adjust the pre load like you said. to do that you just raise the car, and tighten the spring collar until it holds the spring firmly and there is no movement. then usually you want to tighten it another 3mm or so to set preload. see if that helps.

tcjensen

Did you recently change your rebound settings? Shock could be shooting into dip too fast due to rebound damping being too soft, or, rebound damping is too hard and instead of wheel being allowed to fill the dip, the whole car is falling into it. Try going further one way or the other and see what happens ...