Navigating drops on eibach spring

[Yvette]

it clearly states it drops all around 1.2" for our car application,
looking at the drops are all varies............why's that???

I am installing my eibach/koni combo next week or so... I just dont want to be surprised with the outcome....

[arrutled]

I think it will depend on the shock and if people have camber plates or not. As with any product, there is always a margin for error. but I would doubt it would be anymore than +-.2 inches. I had them on my car at one point. Didnt drop it too much.

[lavmugen]

Originally Posted by e90sexion

it clearly states it drops all around 1.2" for our car application,
looking at the drops are all varies............why's that???

I am installing my eibach/koni combo next week or so... I just dont want to be surprised with the outcome....

OT: i think i've read somewhere you are from Surrey. Where are you getting them installed? Are you getting an alignment right away?

[1trip5]

Originally Posted by e90sexion

it clearly states it drops all around 1.2" for our car application,
looking at the drops are all varies............why's that???

I am installing my eibach/koni combo next week or so... I just dont want to be surprised with the outcome....

I'm wondering this as well. I've seen some people say 3/4" even all around, others with slightly less drop in rear (1" front, 3/4" rear).

I'd like to retain the factory stance. It scares me a bit to pay for the install and wind up with an uneven or unexpected drop.

I'm wondering as well if reusing the factory bumpstops is appropriate and if it has an effect on final height.

Suspension experts?

[arrutled]

Originally Posted by 1trip5

I'm wondering this as well. I've seen some people say 3/4" even all around, others with slightly less drop in rear (1" front, 3/4" rear).

I'd like to retain the factory stance. It scares me a bit to pay for the install and wind up with an uneven or unexpected drop.

I'm wondering as well if reusing the factory bumpstops is appropriate and if it has an effect on final height.

Suspension experts?

Bumpstops have no effect on height what so ever. If you dont purchase shorter bumpstops or shave the factory ones you will decrease the spring travel before it reaches the bump stop. Bump stops are like secondary springs that will increase the stiffness before it allows the shock to bottom out. I would suggest you find a vendor for a shorter bumpstop or purchase the bumptop from the performance suspension which is shorter. I know people who just cut the stock ones as well. It depends on how you want to go about it. If I were you I wouldnt worry about the drop as much as I would worry about the shocks and bumpstops.

[thez99]

It was my impression that most people removed the bumpy stoppers when moving to aftermarket springs n shocks...

[1trip5]

ah, i think I have a better understanding of the bump stops now. It seems they are hard pieces of rubber that sit on the shock's piston rod. They prevent the shock from bottoming out (complete spring compression) by absorbing more energy than the spring can at the end of the travel (hence the term 'auxiliary spring'). By reducing the height of the bump stop, you allow the spring to travel more before bump stop absorbs energy. it probably doesn't feel very good when you hit a bump stop. although, better than bottoming out im sure.

Am I catching on?


I can see now how this has no effect on ride height.

[arrutled]

Originally Posted by 1trip5

ah, i think I have a better understanding of the bump stops now. It seems they are hard pieces of rubber that sit on the shock's piston rod. They prevent the shock from bottoming out (complete spring compression) by absorbing more energy than the spring can at the end of the travel (hence the term 'auxiliary spring'). By reducing the height of the bump stop, you allow the spring to travel more before bump stop absorbs energy. it probably doesn't feel very good when you hit a bump stop. although, better than bottoming out im sure.

Am I catching on?


I can see now how this has no effect on ride height.

there you go.

[Yvette]

Originally Posted by lavmugen

OT: i think i've read somewhere you are from Surrey. Where are you getting them installed? Are you getting an alignment right away?

there are 2 shops I can think of right now....
allignment will be done after settling w/ the spring I guess.

[My535i]

I think one of the reasons there are folks reporting different drops is that they are supposed to lower non-sport cars 1.2" lower than stock....but if you have factory sport suspension which is about .5" lower than non sport it will only drop it about .75". (at least that is how it was with my 535i, the same spring lowers the non-sport more from stock than the sport cars but the overall drop ends up being the same)

[1trip5]

Originally Posted by My535i

I think one of the reasons there are folks reporting different drops is that they are supposed to lower non-sport cars 1.2" lower than stock....but if you have factory sport suspension which is about .5" lower than non sport it will only drop it about .75". (at least that is how it was with my 535i, the same spring lowers the non-sport more from stock than the sport cars but the overall drop ends up being the same)

I believe all 135i's share the same ride height (whether you have the sport package or not). Correct me if I am wrong.

So if eibach states 1.2", you would think that every 135i lowered on eibach springs would see approx. 1.2" (+/- .1") after the springs have had time to settle. We are seeing greater variances than that. Of course, measurement technique may have something to do with these variances as well.

[tgxmike]

Originally Posted by 1trip5

I believe all 135i's share the same ride height (whether you have the sport package or not). Correct me if I am wrong.

So if eibach states 1.2", you would think that every 135i lowered on eibach springs would see approx. 1.2" (+/- .1") after the springs have had time to settle. We are seeing greater variances than that. Of course, measurement technique may have something to do with these variances as well.

Yes all 135i are the same ride height, however....

128i withOUT sport/Msport are ~0.5in higher. The Eibach springs fit both cars and are probably rated at the non-sport height of the 128i. (Marketing BS)

My best guess (as I don't have these).....

128i non-sport 1.2" drop
128i sport/MSport 0.75" drop
135i all cars 0.75" drop

[My535i]

Eibach uses the same part number - 2097.140 - for 128i non sport, 128 sport, and 135i. It will definitely lower a non-sport more from stock than a sport.

Originally Posted by 1trip5

I believe all 135i's share the same ride height (whether you have the sport package or not). Correct me if I am wrong.

So if eibach states 1.2", you would think that every 135i lowered on eibach springs would see approx. 1.2" (+/- .1") after the springs have had time to settle. We are seeing greater variances than that. Of course, measurement technique may have something to do with these variances as well.

[My535i]

+1...

Originally Posted by tgxmike

128i non-sport 1.2" drop
128i sport/MSport 0.75" drop
135i all cars 0.75" drop

[TreDirtyFive]

I was on the newer 2011 135i Sport Suspension (which uses linear springs now rather than the former progressive ones) and the car was actually .2 inches, or so, lower than 2010s and earlier sports suspensions. Here is my eibach, spring only, setup with 18s on 40 rubber...It's a touch lower than I'd like..maybe I need to go to 35s.