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      01-06-2012, 10:14 AM   #1
tscdennab
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Eibach Sportline vs Pro-Kit spring rates and stiffness ?

Hi,

Does anybody know the spring rates of Eibach Sportline (not Pro-Kit) ? I can't seem to find this information anywhere...I am not sure what to choose between Bilstein B12 Pro-Kit (includes Eibach Pro-Kit springs) and Sportline (includes Eibach Sportline springs). I am sure the Pro-Kit is very similar to my M-Sport judging by the spring rates, but I'm not sure how the Sportlines are much stiffer or not ?

Thanks !
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      01-06-2012, 10:47 AM   #2
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You're right abotu the Pro Kit springs, not sure about the Sportline spring rates though. Have you tried contacting Eibach? Give them a call, they have been very helpful/knowledgable whenever I called them.
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      01-06-2012, 11:12 AM   #3
tscdennab
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Quote:
Originally Posted by cssnms View Post
You're right abotu the Pro Kit springs, not sure about the Sportline spring rates though. Have you tried contacting Eibach? Give them a call, they have been very helpful/knowledgable whenever I called them.
After a bit more research I found out that the Sportlines have the same spring rates as the Pro-Kit, they just lower the car more:

http://www.e90post.com/forums/showthread.php?t=189173
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      01-12-2012, 01:24 PM   #4
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Keep in mind that Eibach has a different spring kit for the 335 than what you're looking up. The part numbers in your post above are for the 328 and 330. Eibach does not offer a Sportline for the 335.
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      01-12-2012, 06:25 PM   #5
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Originally Posted by tr3flip View Post
Keep in mind that Eibach has a different spring kit for the 335 than what you're looking up. The part numbers in your post above are for the 328 and 330. Eibach does not offer a Sportline for the 335.
You are right, thanks. This made my choice easier, I have already ordered the Bilstein B12 Pro-Kit suspension
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      02-03-2015, 09:43 PM   #6
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Thread revival time.

In the last 2 yeras, Ive used my 135i on the track 70% of the time, and on the street 30% of the time. Looking for better handling, less weight transfer and squat during cornering, braking, accelerating.

I dont care for adjustments, want something low maintenance, and budget is limited, so no coilovers.

Getting ready to pull the trigger on damper/spring upgrade for my E82/135i within a few days.

My short list is the following, all sitting at the same price level:
  1. Bilstein B12 kit (Bundled Eibach springs have 148+456 lb/in rates)
  2. Bilsteins B8 with Swift Spec-R springs (201+503lb/in rates).
  3. Koni Sport with Swift Spec-R springs (201+503lb/in rates).


Which kit would you choose and why?
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      02-28-2015, 09:40 PM   #7
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Quote:
Originally Posted by dcaron9999 View Post
Thread revival time.

In the last 2 yeras, Ive used my 135i on the track 70% of the time, and on the street 30% of the time. Looking for better handling, less weight transfer and squat during cornering, braking, accelerating.

I dont care for adjustments, want something low maintenance, and budget is limited, so no coilovers.

Getting ready to pull the trigger on damper/spring upgrade for my E82/135i within a few days.

My short list is the following, all sitting at the same price level:
  1. Bilstein B12 kit (Bundled Eibach springs have 148+456 lb/in rates)
  2. Bilsteins B8 with Swift Spec-R springs (201+503lb/in rates).
  3. Koni Sport with Swift Spec-R springs (201+503lb/in rates).


Which kit would you choose and why?
What kit did u go with?
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      02-28-2015, 10:06 PM   #8
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Quote:
Originally Posted by matty088 View Post
What kit did u go with?
Bilsteins B8 with Swift Spec-R springs (201+503lb/in rates), rear M3 guide rods, and Dinan Rear Shock Mounts. Parts will get installed by a local shop in about two weeks ...

Longest lasting dampers and stiffest springs out there, short of a coilover. More wheel clearance than a coilover setup.

I get to keep using my four 18x8.5 ET52 rear stock wheels and hopefully 255/35R18 tires.

Should be a step up from stock dampers and springs, which Ive been abusing at the track for two years.

More money left for for tracking events.
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      03-01-2015, 12:30 AM   #9
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Any idea how much of a drop those springs are? I am leaning towards the koni yellows now but worried the hr springs will be too much of s drop
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      03-25-2015, 09:29 PM   #10
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Hey Dcaron, ca va?

How's those B8 struts? I just ordered a set of XI ones and eying a set of Eibach Pro Line springs for my car..

thanks!
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      03-25-2015, 09:40 PM   #11
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Love to hear about drop on those swift spec r springs. I think the b12 kit isn't much of an upgrade in the handling department over stock sport suspension. I like the konis but there is no way I want the hr springs that slam the car. The silly looking. Perhaps the swift are the key??
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      03-26-2015, 01:46 AM   #12
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Quote:
Originally Posted by matty088 View Post
I think the b12 kit isn't much of an upgrade in the handling department over stock sport suspension
Based on what experience with the kit? My '11 E90 with sports suspension handles nowhere near as good as my previous '08 with the B12 kit. I've gone from sports to B12 and now back to sports and IMO it's a big handling upgrade.
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      03-26-2015, 09:19 PM   #13
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Quote:
Originally Posted by kentgbr View Post
Based on what experience with the kit? My '11 E90 with sports suspension handles nowhere near as good as my previous '08 with the B12 kit. I've gone from sports to B12 and now back to sports and IMO it's a big handling upgrade.
Seems like a pretty antagonistic response.
Like everyone else that frequents forums I have researched reviews and my comment is based on this second hand knowledge. Is that ideal? Of course not. But this is generally the purpose of forums. That's why I am here at least. To Learn.

They seem like a comfort upgrade first and perf upgrade second. Even the sales pitch on the websites speak to a small performance upgrade and are good if "your stock suspension is getting old". Trust me id rather get the b12. It's a very cheap option. But I struggle to find reviews that aren't speaking about how comfortable they are as the MAIN message of the review.

Most importantly, Intuitively it doesn't sound too great to me to upgrade a suspension to the same spring rates.
Apparently you think these are a big perf upgrade. Could you expand where you are feeling the main improvements?

Last edited by matty088; 03-26-2015 at 09:24 PM.
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      03-27-2015, 12:17 AM   #14
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Quote:
Originally Posted by matty088 View Post
Seems like a pretty antagonistic response.
Like everyone else that frequents forums I have researched reviews and my comment is based on this second hand knowledge. Is that ideal? Of course not. But this is generally the purpose of forums. That's why I am here at least. To Learn.

They seem like a comfort upgrade first and perf upgrade second. Even the sales pitch on the websites speak to a small performance upgrade and are good if "your stock suspension is getting old". Trust me id rather get the b12. It's a very cheap option. But I struggle to find reviews that aren't speaking about how comfortable they are as the MAIN message of the review.

Most importantly, Intuitively it doesn't sound too great to me to upgrade a suspension to the same spring rates.
Apparently you think these are a big perf upgrade. Could you expand where you are feeling the main improvements?
Didn't mean to antagonize - just wanted to respond to your comments with opinions based on direct street and track experience with the product. The B12 kit feels tighter and more controlled than OEM sports suspension - it's very noticeable. Eibachs seem stiffer than the D8/D4 ZSP springs they replaced. I'm skeptical of the "same spring rate" common knowledge until real test data is presented as proof. Wouldn't recommend it as is for 70% track use like dcaron9999's requirement, but it's good for spirited driving and the occasional HPDE. Good luck with whatever you decide to get.
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      03-27-2015, 05:21 PM   #15
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Great response. Ty very much. Solid all around
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