Eibach Springs

[MDIVISION]

Well we know that the US Eibachs will be firmer than these. I think you would get used to the springs. Give it a month or so

[MatthewDavid]

Has anyone heard an update on when the US spec will be released?

[tr3flip]

Originally Posted by MatthewDavid

Has anyone heard an update on when the US spec will be released?

We have prototypes coming out of production the first week of May. Shortly after we'll have them tested and hopefully put the revision straight into production. We should have a small amount of springs from our prototype run available for sale once we've finished all of our testing.

I try to chime in as much as I can on this thread but if anyone has any questions we're always open to phone calls at Eibach. 951.256.8300

-Tony from Eibach

[MDIVISION]

Originally Posted by tr3flip

We have prototypes coming out of production the first week of May. Shortly after we'll have them tested and hopefully put the revision straight into production. We should have a small amount of springs from our prototype run available for sale once we've finished all of our testing.

I try to chime in as much as I can on this thread but if anyone has any questions we're always open to phone calls at Eibach. 951.256.8300

-Tony from Eibach

Would you say you will drop 1" in the front and .5" in the rear?

[tr3flip]

Originally Posted by MDIVISION

Would you say you will drop 1" in the front and .5" in the rear?

So far it's looking like 22mm up front and 5mm in the back. I'll confirm once we get our prototype sets installed and tested.

[MDIVISION]

Originally Posted by tr3flip

So far it's looking like 22mm up front and 5mm in the back. I'll confirm once we get our prototype sets installed and tested.

So exactly as euro spec???

[jackkk]

Yesterday I tried for 5 minutes the friends M4 with Eibach springs.
He has not EDC suspention and it felt like on my 335i with this springs.
It is okay, but the car is bouncing on small hummocks..
The car stace looked perfect, the steering was good, but I don't really like the bouncing feel...
Does the car with EDC has the same problem?

It feels like the shocks and springs doen't work together sometimes.

[Black Gold]

Originally Posted by jackkk

Yesterday I tried for 5 minutes the friends M4 with Eibach springs.
He has not EDC suspention and it felt like on my 335i with this springs.
It is okay, but the car is bouncing on small hummocks..
The car stace looked perfect, the steering was good, but I don't really like the bouncing feel...
Does the car with EDC has the same problem?

It feels like the shocks and springs doen't work together sometimes.

that's how any set of springs is likely going to work with stock shocks

lowering without compensating for lack of suspension travel, spring rate that is progressive and not matched to OEM valving (which is designed for linear springs of a certain rate)

unfortunately its going to be the case on any set

I personally am dedicated to waiting for ZCP suspension, at which time I will buy the matching springs and shocks and retrofit. personally, im a fan of the performance of the stock suspension

[jackkk]

Originally Posted by KennyPowers

that's how any set of springs is likely going to work with stock shocks

lowering without compensating for lack of suspension travel, spring rate that is progressive and not matched to OEM valving (which is designed for linear springs of a certain rate)

unfortunately its going to be the case on any set

I personally am dedicated to waiting for ZCP suspension, at which time I will buy the matching springs and shocks and retrofit. personally, im a fan of the performance of the stock suspension

Okay tnx. If the same will be with the EDC suspention, it will be waste of money for me.
I will wait for something that will work with the stock EDC button. something like KW DDC that I had on my 1M and I really enjoyed this suspention.

[CSanto]

Originally Posted by KennyPowers

that's how any set of springs is likely going to work with stock shocks

lowering without compensating for lack of suspension travel, spring rate that is progressive and not matched to OEM valving (which is designed for linear springs of a certain rate)

unfortunately its going to be the case on any set

I personally am dedicated to waiting for ZCP suspension, at which time I will buy the matching springs and shocks and retrofit. personally, im a fan of the performance of the stock suspension

Swift springs are supposedly linear. I'm thinking these shouldnt have the bounce that was spoken about.

[CanAutM3]

Originally Posted by CSanto

Swift springs are supposedly linear. I'm thinking these shouldnt have the bounce that was spoken about.

According of the pictures published, the Swift F8X are variable rate springs.

And even if they were completely linear, if the spring rate is greater than the stock one, there will be more bounce.

[CanAutM3]

Originally Posted by jackkk

Yesterday I tried for 5 minutes the friends M4 with Eibach springs.
He has not EDC suspention and it felt like on my 335i with this springs.
It is okay, but the car is bouncing on small hummocks..
The car stace looked perfect, the steering was good, but I don't really like the bouncing feel...
Does the car with EDC has the same problem?

It feels like the shocks and springs doen't work together sometimes.

It is very possible the springs will feel differently with the EDC suspension since EDC has the ability to vary the damping rate.

[tr3flip]

Originally Posted by MDIVISION

So exactly as euro spec???

No, we are bringing down the front an extra 2mm and increasing the rates front and rear over the Eibach Euro M3/M4 kit.

Originally Posted by KennyPowers

that's how any set of springs is likely going to work with stock shocks

lowering without compensating for lack of suspension travel, spring rate that is progressive and not matched to OEM valving (which is designed for linear springs of a certain rate)

unfortunately its going to be the case on any set

I personally am dedicated to waiting for ZCP suspension, at which time I will buy the matching springs and shocks and retrofit. personally, im a fan of the performance of the stock suspension

All Eibach springs are engineered and tested around the factory suspension travel and shock valving limits. The rates on the Euro kit are very conservative. Not sure why Eibach Germany decided to do this but my guess would be to stay within TUV regulations. I don't know for sure.

What I do know is that even though are kits technically rated as progressive springs, once you get into the working rate of the spring it becomes progressive. Even at static height the spring will already be into the linear rate of the travel.

I think it's safe to say that this new M3/M4 Pro-Kit will perform in the same great way as our E90/E92 M3 kit with factory dampers.

[CanAutM3]

Originally Posted by tr3flip

No, we are bringing down the front an extra 2mm and increasing the rates front and rear over the Eibach Euro M3/M4 kit.



All Eibach springs are engineered and tested around the factory suspension travel and shock valving limits. The rates on the Euro kit are very conservative. Not sure why Eibach Germany decided to do this but my guess would be to stay within TUV regulations. I don't know for sure.

What I do know is that even though are kits technically rated as progressive springs, once you get into the working rate of the spring it becomes progressive. Even at static height the spring will already be into the linear rate of the travel.

I think it's safe to say that this new M3/M4 Pro-Kit will perform in the same great way as our E90/E92 M3 kit with factory dampers.

Seems like a great setup

Can't wait for availability

[Black Gold]

Originally Posted by tr3flip

No, we are bringing down the front an extra 2mm and increasing the rates front and rear over the Eibach Euro M3/M4 kit.



All Eibach springs are engineered and tested around the factory suspension travel and shock valving limits. The rates on the Euro kit are very conservative. Not sure why Eibach Germany decided to do this but my guess would be to stay within TUV regulations. I don't know for sure.

What I do know is that even though are kits technically rated as progressive springs, once you get into the working rate of the spring it becomes progressive. Even at static height the spring will already be into the linear rate of the travel.

I think it's safe to say that this new M3/M4 Pro-Kit will perform in the same great way as our E90/E92 M3 kit with factory dampers.

I don't meqn to argue, but what does "tested around the stock suspension travel" mean?

You cannot get around the fact that you are removing 1 inch of suspension travel from the car in the front if you drop the car by an inch. This will result in worse ride and performance, there is not really any way to get around this. Is there another reason or explanation I'm missing?

And honestly, imo the performance and ride on the e90 was nothing to be excited about. Worse ride and worse suspension control imo

[MatthewDavid]

Wait 5 mm rear is less than a quarter inch; is that right?

Originally Posted by tr3flip

So far it's looking like 22mm up front and 5mm in the back. I'll confirm once we get our prototype sets installed and tested.

[MatthewDavid]

So basically what you're looking for is the least worst option, right? Swift & Eibach will be less ideal than stock, goes without saying I suppose, but better than H&R, and you're still doing springs anyway (and not full on coil overs)? Why not K&W HAS?

Originally Posted by KennyPowers

I don't meqn to argue, but what does "tested around the stock suspension travel" mean?

You cannot get around the fact that you are removing 1 inch of suspension travel from the car in the front if you drop the car by an inch. This will result in worse ride and performance, there is not really any way to get around this. Is there another reason or explanation I'm missing?

And honestly, imo the performance and ride on the e90 was nothing to be excited about. Worse ride and worse suspension control imo

[MDIVISION]

Yeah I think that's where I'm headed.

[JTO24]

Interested in seeing the pics and 3rd party reviews of the US spec springs.

[tr3flip]

Originally Posted by KennyPowers

I don't meqn to argue, but what does "tested around the stock suspension travel" mean?

You cannot get around the fact that you are removing 1 inch of suspension travel from the car in the front if you drop the car by an inch. This will result in worse ride and performance, there is not really any way to get around this. Is there another reason or explanation I'm missing?

And honestly, imo the performance and ride on the e90 was nothing to be excited about. Worse ride and worse suspension control imo

Every vehicle we develop suspension for comes into our Eibach facility in Corona, CA where we disassemble the factory suspension. We rate the springs, shock dyno the factory dampers and then cycle test the suspension without the springs to measure travel. With all three of these variables tested it's pretty easy for us to determine rate and height for a performance spring. Spring rates are typically increased by about 20% over stock.

Just because our spring is lowering the M3/M4 by 22mm (1" = 25.4mm) up front does not mean you're taking away 22mm of compression travel. There's this thing called "motion ratio" that has to be factored in which would make this number less.

Technically, the shock travel remains exactly the same. All our springs are doing is moving the compression travel down slightly which is fine. BMW uses really good shocks on these cars and they have built in shock travel limits that allow us to use more of this compression travel. We test these limits and build our springs to increase performance, not take it away.

[Chris H.]

When are these going to be made available?

Thanks

[tr3flip]

Originally Posted by Chris H.

When are these going to be made available?

Thanks

Springs are currently in production at our CA facility. They're expected to be completed the first week of May and we will then do our testing with the new design.