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      11-20-2019, 01:45 AM   #1
francesco4988
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Eibach PROKIT Issue

Hello guys, i'm finding out that as soon as i load more than 4 peoples in my car (325D station wagon) my 19" wheel touches the fender in the REAR side.
I DO have prokit from eibach, so -2.5 cm around in back side and same in frontside.. I don't really know what to do.. I bought as well 4 bilstein B8 in order to change suspension, do you think that this is going to fix the problem or is it better to put back original springs?

Thx a lot
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      11-20-2019, 07:00 AM   #2
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What trim/spec was the car originally : SE, M-Sport ?

How does Eibach measure that reduction in ride height : from SE or from M-Sport ?

2.5cm lowering from M-Sport might simply be too much.

Are you still running OEM dampers ? If so, they may not have the damping resistance to control the chassis movement when the car is loaded.

The ride height for my car with Ohlins R&T, along with 12mm spacers and 265 rear tyres, means that there is the slightest contact between the outer tyre shoulder and the arch liner, BUT, I didn't even know it was happening until the suspension shop pointed it out.

The Ohlins R&T setup is pretty stiff, so it may be that your current dampers and spring rates are just not preventing your car from reaching the bottom end of its suspension travel.
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      11-20-2019, 07:18 AM   #3
francesco4988
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Quote:
Originally Posted by Watsey View Post
What trim/spec was the car originally : SE, M-Sport ?

How does Eibach measure that reduction in ride height : from SE or from M-Sport ?

2.5cm lowering from M-Sport might simply be too much.

Are you still running OEM dampers ? If so, they may not have the damping resistance to control the chassis movement when the car is loaded.

The ride height for my car with Ohlins R&T, along with 12mm spacers and 265 rear tyres, means that there is the slightest contact between the outer tyre shoulder and the arch liner, BUT, I didn't even know it was happening until the suspension shop pointed it out.

The Ohlins R&T setup is pretty stiff, so it may be that your current dampers and spring rates are just not preventing your car from reaching the bottom end of its suspension travel.
My car is a Modern, so it is supposed to be the "highest" RWD version. Eibach says that the PRO-KIT springs lower the car around -2.5 cm, so it's around 1 cm more than M-Sport version (M-sport declare -1.5).
Actually at home I have some dampers with lower stand, that are made to work with eibach prokit (it's bilstein B12, it's pretty famous here in Europe).
Another thing that i thought about is that i have also some WSP Basel metal gun with very low ET value (19 inch and 255 at rear tire, i dont remember exactly the ET value) , so maybe this is also one of the reason why my rear tire are touching the fender. However I really don't want to put back the original springs and i would like to try to use the new dampers I bought last weekend.

Changing dampers can affect also the height during corner with full load of the car? I tired them not mounted and they seems to be much stiffer than original..

The fact is that i'm really afraid to brake the tires due to friction with the internal fender/arch of wheel..


Thx in advance,

Francesco
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      11-20-2019, 07:29 AM   #4
francesco4988
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The car setup is like this one
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      11-20-2019, 10:43 AM   #5
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What are your rear tire size? 255-??-19

Probably you are running an agressive offset.

19x ?? ET??
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      11-20-2019, 01:11 PM   #6
francesco4988
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Quote:
Originally Posted by Kefka View Post
What are your rear tire size? 255-??-19

Probably you are running an agressive offset.

19x ?? ET??
Quote:
Originally Posted by Kefka View Post
What are your rear tire size? 255-??-19

Probably you are running an agressive offset.

19x ?? ET??
I really don't know which one is the ET but the tire isn't really stretched!!! I mean.. not at all That's funny 😂 anyway it is 255-35-19
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      11-20-2019, 01:29 PM   #7
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What Eibach Pro-kit part number do you have?

Do you want a higher rear spring rate, or do you just want a higher rear ride height?
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      11-20-2019, 01:35 PM   #8
francesco4988
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Quote:
Originally Posted by FaRKle! View Post
What Eibach Pro-kit part number do you have?

Do you want a higher rear spring rate, or do you just want a higher rear ride height?
I just would like that when I load 4 peoples the rear tires don't touch the fenders.. the number of the rear spring I have is this one
E10-20-031-04-22 with front max load 1020 kg and read 1310 kg (it's eibach prokit)
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      11-20-2019, 02:02 PM   #9
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sounds like your wheels are the wrong offset. Do you have specs for your wheels (not tires)?
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      11-20-2019, 02:12 PM   #10
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Quote:
Originally Posted by hybris View Post
sounds like your wheels are the wrong offset. Do you have specs for your wheels (not tires)?
Actually I don't have it.. looking in internet the model of wheel (Basel metal gun from WSP Italy) there are different ETs, from 23 to 34.. I should remove a wheel to figure out which one it is

Do you think could be enough changing dampers? (Bilstein B8)
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      11-20-2019, 02:13 PM   #11
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Quote:
Originally Posted by francesco4988 View Post
Actually I don't have it.. looking in internet the model of wheel (Basel metal gun from WSP Italy) there are different ETs, from 23 to 34.. I should remove a wheel to figure out which one is it

Do you think could be enough changing dampers? (Bilstein B8)
Do you have a url to the wheel? And how wide is it? (wheel width, for instance 9.5" ?)
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      11-20-2019, 02:15 PM   #12
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Quote:
Originally Posted by francesco4988 View Post
I just would like that when I load 4 peoples the rear tires don't touch the fenders.. the number of the rear spring I have is this one
E10-20-031-04-22 with front max load 1020 kg and read 1310 kg (it's eibach prokit)
You have rear spring F11-20-031-03-HA. That spring was recommended in Eibach's original F31 kits, but has since been updated to use rear spring F11-20-014-14-HA. The newer -14 spring is taller by 7mm, but has the same spring rate as your -03 spring.

If you just want to raise the rear ride height you can make cheap kydex shims/spacers to place in or on the rear spring cups like I did once. Dampers aren't really going to change a whole lot, and the method by which they would (high gas pressure) negatively affects ride quality.
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      11-20-2019, 02:18 PM   #13
francesco4988
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Quote:
Originally Posted by hybris View Post
Quote:
Originally Posted by francesco4988 View Post
Actually I don't have it.. looking in internet the model of wheel (Basel metal gun from WSP Italy) there are different ETs, from 23 to 34.. I should remove a wheel to figure out which one is it

Do you think could be enough changing dampers? (Bilstein B8)
Do you have a url to the wheel?
I've just asked to previous owner and they are 8.5x18 ET34, actually I don't know if these numbers are okay for Bmw f31.. what do you think?
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      11-20-2019, 02:25 PM   #14
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Quote:
Originally Posted by francesco4988 View Post
I've just asked to previous owner and they are 8.5x18 ET34, actually I don't know if these numbers are okay for Bmw f31.. what do you think?
Well, it's pretty wide, not sure if the rear fender is wider on the f31 compared to the f30. I had to go down from 265 to 255 to avoid rubbing on my wheels and they're ET40, so yours poke out like 0.5cm more.

So I guess either new wheels or get the uprated springs mentioned above (but then your car won't look as good since it's taller).
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      11-20-2019, 02:30 PM   #15
francesco4988
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Quote:
Originally Posted by hybris View Post
Quote:
Originally Posted by francesco4988 View Post
I've just asked to previous owner and they are 8.5x18 ET34, actually I don't know if these numbers are okay for Bmw f31.. what do you think?
Well, it's pretty wide, not sure if the rear fender is wider on the f31 compared to the f30. I had to go down from 265 to 255 to avoid rubbing on my wheels and they're ET40, so yours poke out like 0.5cm more.

So I guess either new wheels or get the uprated springs mentioned above (but then your car won't look as good since it's taller).
How much did you lower the car? 🙁😂
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      11-20-2019, 04:36 PM   #16
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How much camber are you running? I ran 275/35/18 tires on an 18x10 +40 wheel with a full car and trunk before without any rubbing issues with a stock spec alignment. I was low on KW V1s at the time as well.
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      11-21-2019, 10:17 AM   #17
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Quote:
Originally Posted by francesco4988 View Post
How much did you lower the car? ����
Around 40mm in the rear probably.

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      11-21-2019, 02:41 PM   #18
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Silly idea but... can this be fixed with a simple fender roll?
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      11-21-2019, 02:43 PM   #19
francesco4988
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Quote:
Originally Posted by percychow View Post
Silly idea but... can this be fixed with a simple fender roll?
Most probably! The problem is that I actually don't know anyone here in my city that's able to do it properly.. I need to figure out what to do soon and give you some updates 😉
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      11-21-2019, 05:00 PM   #20
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@francesco4988 - My next best guess, contact the local BMW dealership and ask for a body shop (car frame repair) referral. That should work - hopefully one is nearby.
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