H&R springs or Eibach springs?

[Tbonem3]

Suspension for the light csl will not necessarily be appropriate for your 3400lb m3.

[Ragincajun5220]

OP states his problem with his current set up is that it's too stiff and bouncy. This problem will remain with basically all of the lowering springs. I've only personally used Eibach, but a spring is a spring. They're all basically the same rate, so the amount of lowering is the major difference.

If you must lower, I'd say Dinan is the only way to go. The less lowering the better. But you will have best ride and handling with the stock springs short of quality coilovers.The car was engineered brilliantly for road use from the factory.

This makes sense to me, without having personal experience with any of these spring setups.

the csl dampers could provide a good solution with lowering springs as they are shorter than the oem m3 dampers.

as far as I know, no manufacturer provides shortened replacement dampers outside of the coilover kits.

personally, on my new to me m3 I plan to try out the csl setup for this reason. I’ll report back with the results.

[01SG]

OP states his problem with his current set up is that it's too stiff and bouncy. This problem will remain with basically all of the lowering springs. I've only personally used Eibach, but a spring is a spring. They're all basically the same rate, so the amount of lowering is the major difference.

If you must lower, I'd say Dinan is the only way to go. The less lowering the better. But you will have best ride and handling with the stock springs short of quality coilovers.The car was engineered brilliantly for road use from the factory.

[Tbonem3]

according to this post they are 400/450

https://www.e46fanatics.com/threads/...ested.1064012/

So too much up front and too little in the rear. No wonder you're bouncing around funny.

[Tbonem3]

Out of curiosity, why is dinan lower on the list than eibach?

I would think the more minimal drop of the dinan would result in better ride quality and performance when using stock height shocks / struts (either oem or aftermarket)?

But people want a drop. Eibach gives you both. If drop isn't important, than stick with stock suspension which has maximum travel. Everything's a compromise of some sort. How much is the question.

[Ragincajun5220]

Spring hierarchy

Eibach
Dinan
Vogtland

H&R
Tein

Your ride height is good no issue there imo.

Out of curiosity, why is dinan lower on the list than eibach?

I would think the more minimal drop of the dinan would result in better ride quality and performance when using stock height shocks / struts (either oem or aftermarket)?

[Nate047]

I had Eibach springs and Bilstein B8 (I think) shocks, it was really nice for around town use. IMO it was the perfect OEM+ ride height and comfort vs sportiness balance. But it’s definitely a far cry from a more aggressive coilover. So just be aware of what you’re trading off and make sure that’s what you want.

[01SG]

Could just go stock springs. Better in all ways in my opinion, unless you have that wheel gap fetish which I never understood.

[maupineda]

I will look into them.

I have H&R coils but dit not like their stiffness, I went Swift since it has pretty much any rate you want. I went with 225 front, 600 rear. But my plan is to lower the rear to 500. For rears I chose TCK.

[Maxima SE]

Swift

I will look into them.

[Maxima SE]

But you can also get 2.5" (63.5-65mm) springs from many other brands like hypercoil, swift, h&r, vogtland, et al. I dont quite remember, but I thought eibach coilover kit came with something like 500/600 which is too much up front imo. Try a 350lb. 600 rear is perfect for street car.

according to this post they are 400/450

https://www.e46fanatics.com/threads/eibach-pro-street-s-coilover-for-e46-m3-tested.1064012/

[maupineda]

Swift

[Tbonem3]

But you can also get 2.5" (63.5-65mm) springs from many other brands like hypercoil, swift, h&r, vogtland, et al. I dont quite remember, but I thought eibach coilover kit came with something like 500/600 which is too much up front imo. Try a 350lb. 600 rear is perfect for street car.

[oceansize]

I have the springs that were shipped with the eibach coilovers. I don’t know what the rates are. Who makes replacement springs for them with a softer rate ?

You can order the coilover springs straight from Eibach. I've experimented.

[Maxima SE]

Spring hierarchy

Eibach
Dinan
Vogtland

H&R
Tein

That said, before you go back to a stock like setup, you could get lower spring rates for your coilovers. Do you know what you have now?

Your ride height is good no issue there imo.

I have the springs that were shipped with the eibach coilovers. I don’t know what the rates are. Who makes replacement springs for them with a softer rate ?