[BigDuderShooter]

Just installed set of these, 2011 Coupe. Question is do the arms for the ride height sensors need to be modified? I don't think they're locking out or anything but am wondering if there's some sort of "nominal" position that these are in with normal springs and then are out of that range with the lowering springs that then causes the shock rates to be out of sync?

 

[BV_Mully]

I made no adjustments to mine and haven't had any issues. I have coupe springs on my sedan, which lowers the rear even more. You may have to modify if slammed on coil overs, but the Eibachs don't drop it enough to effect the mag ride.

 

[BigDuderShooter]

OK, I just searched through some older posts,
Modded magnetic ride control rods after lowering
AND
READ THIS BEFORE YOU INSTALL LOWERING SPRINGS!!!!!

Apparently there is no difference to the position of the sensor, as long as it is not bottoming out one way or the other.

The problem I'm having is that the car is just too bouncy up front. The dampening rates between the front and rear are different causing a pogo stick like effect. Not hugely terrible but noticeable. My Gen6 Camaro has stiffer suspension and does not ride like this.

I don't think it was doing this last year. I just picked it up in late September and then about a month later the rear shocks went bad and about a month after that it was stored for the winter. I pulled it out this spring and went right to my shop and replaced pretty much just about everything up front except the tie rod ends. Shocks, Eibach springs, CS UCA and LCA bushings, ball joints, tires are good.

The car is just not balanced front to rear. Putting the suspension into sport mode definitely helps, so 1) the mag ride is working, and 2) stiffening the shock rate helps.

Have an alignment scheduled with a shop that just did a lowered Hellcat on Eibachs so I'm really hoping that is what the problem is.

 

[BigDuderShooter]

After getting it back on the road and aligned there is definitely an extra rebound bounce when hitting the bumps. Kind of like the import tuner cars that get slammed and look like a pogo stick coming down the road. It's certainly not that bad but it's there and I notice it. The alignment shop I took it to did a Hellcat on cut Eibachs and he said that car was even worse but that my car definitely had an extra bounce or two.

There's a disconnect between the spring rates and damping rates. Verified I have Coupe springs for my Coupe, 38148-140. Called Eibach but their tech support is closed until Monday. Definitely has nothing to do with the ride height sensors. I have new shocks all the way around, new LCA and UCA bushings, new balls - upper and lower, new motor mounts, new sway bar bushings. Everything is real tight and smooth except for this little extra pogo bounce.

So is no one else experiencing this? Is this just me or has everyone pretty much accepted that they handle this way when lowered? It gets better when sport mode is enabled, so does everyone just ride around in sport mode?

 

[Prime Time]

Installed mine on my sedan (Coupe springs) a few years back and have not had any of the symptoms you are experiencing. The only thing I noticed is a year or so later I started to get that "Squeak" from the suspension. Other than that the car feels great. I always ride in touring unless I'm feeling spicy......! I open the QTP's, put it in sport mod and I'm GONE!!!!!!

 

[BigDuderShooter]

That seems to be what Eibach is saying as well. It's definitely an extra step of rebound dampening though. It's so obvious driving over speed bumps at low speed. The front will compress, then rebound up past the settling point, and rebound back down to settle in. The rear is right on. It will compress and then rebound to the normal "settled" position one time.

I'm focusing on faulty front shocks. There are two sets of numbers on each one and nothing correlates with GM numbers. BWI who makes these does not interact with Joe's like us. Regardless I sent them an email inquiry. Rock Auto is just as useless. All they want to do is refund or replace...which is cool I guess but I need some damn tech support man.

So I'm wondering if anyone can help correlate the numbers on the front shocks? On the left front I have:

410​

22251173​

21299011​

And on the right front shock I have:

4DS​

22251173​

21298231​

The common middle number might be a BWI part number? And the last 8 digit number a date and/or plant code or something? Maybe the top number a build code or something. The rear shocks have these similar numbers PLUS the actual GM part number, but the fronts do not.

 

[BigDuderShooter]

Problem solved with a new pair of front shocks. The original "new" shocks were bad somehow. All the ballyhoo is gone and it rides like normal, no more pogo sticking. The front and rear are balanced and now you feel more side to side which is perfect.