Help me choose my suspension upgrade

fredcase · 10-27-2020, 10:18 AM

Called the dealer, BMW performance suspension, which included shocks, springs and a front sway bar is discontinued. and was only $1600, bummer.

fredcase · 10-27-2020, 01:25 PM

Bilstein or Koni matched with a decent set of springs.

Like everyone keeps mentioning here, the Eibachs are pointless.

fredcase · 10-27-2020, 01:39 PM

Quote:

Originally Posted by FCobra94

Bilstein or Koni matched with a decent set of springs.

Like everyone keeps mentioning here, the Eibachs are pointless.

what would be a good, available spring set up for some Bilstien B8's?

bluewater328 · 10-27-2020, 02:35 PM

Quote:

Originally Posted by Tambohamilton

Contact a friendly BMW dealership about the performance springs. They are available online too. You're looking for koni sport shocks (the yellow ones)...they are widely available.

What is your budget?

Seriously? I thought these were long since discontinued (you're speaking of the yellow performance ones, right)?

Tambohamilton · 10-27-2020, 03:02 PM

The springs themselves are still available, but the kits aren't. I'm not sure if the official shocks are still available, and it's just the sway bars that aren't.

bluewater328 · 10-27-2020, 06:40 PM

Quote:

Originally Posted by Tambohamilton

The springs themselves are still available, but the kits aren't. I'm not sure if the official shocks are still available, and it's just the sway bars that aren't.

Weird, I was looking a few months back. Only saw them on ebay on occasion.

fredcase · 10-27-2020, 08:48 PM

I can’t find the springs or shocks. All I can get is Dinan springs, and either Bilstien B8 or koni shocks.

BSM n54iS · 10-27-2020, 10:40 PM

https://www.dinancars.com/products/s...arts/D100-0497

https://www.ecstuning.com/b-dinan-pa...waApE6EALw_wcB

Double and triple check part numbers. There seem to be a few different ones for e92/e90

Tambohamilton · 10-28-2020, 02:28 AM

Quote:

Originally Posted by bluewater328

Weird, I was looking a few months back. Only saw them on ebay on occasion.

Got a quote for springs a couple of months ago from a dealer. They're also available from a couple of retailers too. NB: UK...if that makes a difference.

See here, for example:
https://www.schmiedmann.com/en/produ...1-33-6-788-894
I think that part no is a front spring for an e90 335i.
https://www.fcpeuro.com/products/bmw...ce-31336788894
https://www.turnermotorsport.com/p-5...uine-bmw-part/

https://www.ecstuning.com/b-genuine-...g/31336788894/

fredcase · 10-28-2020, 08:17 AM

Quote:

Originally Posted by Tambohamilton

Got a quote for springs a couple of months ago from a dealer. They're also available from a couple of retailers too. NB: UK...if that makes a difference.

See here, for example:
https://www.schmiedmann.com/en/produ...1-33-6-788-894
I think that part no is a front spring for an e90 335i.
https://www.fcpeuro.com/products/bmw...ce-31336788894
https://www.turnermotorsport.com/p-5...uine-bmw-part/

https://www.ecstuning.com/b-genuine-...g/31336788894/

Thanks! I may have found the BMW performance strut kit online. I ordered, we’ll see if it comes back out of stock or not.

avocet · 10-29-2020, 02:36 AM

Quote:

Originally Posted by bluewater328

Did you get custom rate Sprint springs or did you get the off the shelf drop kit?

Mine are off the shelf spec r springs. I also went to a square set up at the same time and am thinking I need to pull out my H&R 20mm rear bar and put back in my Hotchkis 16mm rear bar. It feels like I might have gone a little to far trying to balance out understeer...

Tambohamilton · 10-29-2020, 05:21 AM

Quote:

Originally Posted by avocet

Mine are off the shelf spec r springs. I also went to a square set up at the same time and am thinking I need to pull out my H&R 20mm rear bar and put back in my Hotchkis 16mm rear bar. It feels like I might have gone a little to far trying to balance out understeer...

Or switch back to the staggered setup

I know, the two aren't equivalent, but swapping wheels is definitely a lot less labour intensive!

fredcase · 10-29-2020, 10:26 AM

Quote:

Originally Posted by fredcase

Thanks! I may have found the BMW performance strut kit online. I ordered, we’ll see if it comes back out of stock or not.

No longer available.

Looks like I'm leaning towards B8's or koni's on BMW performance, or dinan springs.

BSM n54iS · 10-29-2020, 11:58 AM

Quote:

Originally Posted by fredcase

No longer available.

Looks like I'm leaning towards B8's or koni's on BMW performance, or dinan springs.

You don't want that full kit anyways, apart from the springs everything else is sub-par

avocet · 10-29-2020, 12:56 PM

Quote:

Originally Posted by Tambohamilton

Or switch back to the staggered setup

I know, the two aren't equivalent, but swapping wheels is definitely a lot less labour intensive!

lol, ya swapping wheels is the easy way. I actually have my staggered stock 19's back on right now, but having lightweight 18's will makes it feel so much nicer! Anyways, I am a glutton for punishment... I have swapped the rear sway like 3 times now trying to find nirvana in chassis balance...

avocet · 10-29-2020, 01:07 PM

Quote:

Originally Posted by fredcase

I don’t drive this car in winter.

I think everyone with the B12 kit is very happy with it. The drop is about what I’d like.

Sounds like you might have found your answer! I don't think I have heard any negatives regarding the b12 kit. I don't think you can go wrong with that!

Oh and I thought I would clarify... I had the sport package springs... NOT the BMW Performance springs that I mistakenly mentioned I had. I was also running SP lowering perches on the front struts with the sport springs. This effectively reduces the spring preload and undoubtable contributed to the overdamped condition I was experiencing.

Tambohamilton · 10-29-2020, 02:35 PM

Lowering perches mean you sit that amount further into your aux springs...harshness and understeer will result!

Simplest way to lower the front end without affecting ride is to switch to xd strut top mounts; they're about 3/8-1/2" shorter than sport mounts, and 1/2-5/8" ish shorter than non-sport ones. Clearly that only works for rwd cars...

fredcase · 10-29-2020, 03:06 PM

Quote:

Originally Posted by avocet

Sounds like you might have found your answer! I don't think I have heard any negatives regarding the b12 kit. I don't think you can go wrong with that!

True, but, I think a lot of the people happy with them are happy they are comfortable, with a slight performance increase. I’m willing to sacrifice some comfort for performance. Motor and tranny mounts made this pretty much full race car. And, it’s certainly not reliable enough for long road trips.

fredcase · 10-30-2020, 09:43 AM

B14 kit any good? Or is it just a B12 with height adjustment?

What about the Koni+H&R spring kits? they have 2 different ones, I'm not sure what the difference is.

https://www.tdotperformance.ca/koni-...ering-kit.html

https://www.tdotperformance.ca/koni-...ering-kit.html

bmw335ie90 · 10-30-2020, 10:45 PM

.

bluewater328 · 10-31-2020, 09:40 PM

Quote:

Originally Posted by fredcase

B14 kit any good? Or is it just a B12 with height adjustment?

What about the Koni+H&R spring kits? they have 2 different ones, I'm not sure what the difference is.

https://www.tdotperformance.ca/koni-...ering-kit.html

https://www.tdotperformance.ca/koni-...ering-kit.html

No. different systems. B14 supposedly sacrifices some things for the adjustability (while the price is about the same). But we'll see if anything changes in the next batch.

mweisdorfer · 11-01-2020, 08:48 AM

Why not go with the B12 kit & Eibach front & rear sway bars.

After the break in period, if you want to stiffen it up even further, then add Monroe rear, upper bump stops.

If you want even more, but the BMW sport springs.

You can get M3 subframe bushings & M3 diff bushings too to create a stiffer & more connected ride.

10-27-2020, 10:18 AM	#23
fredcase Captain 261 Rep 776 Posts Drives: Bmw=trash Join Date: Mar 2014 Location: Noyb iTrader: (1)	Called the dealer, BMW performance suspension, which included shocks, springs and a front sway bar is discontinued. and was only $1600, bummer.
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10-27-2020, 01:25 PM	#24
FCobra94 Guest 0 Rep n/a Posts Drives:	Bilstein or Koni matched with a decent set of springs. Like everyone keeps mentioning here, the Eibachs are pointless.
	Appreciate 1 fredcase260.50 Quote

10-27-2020, 03:02 PM	#27
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	The springs themselves are still available, but the kits aren't. I'm not sure if the official shocks are still available, and it's just the sway bars that aren't.
	Appreciate 0 Quote

10-27-2020, 08:48 PM	#29
fredcase Captain 261 Rep 776 Posts Drives: Bmw=trash Join Date: Mar 2014 Location: Noyb iTrader: (1)	I can’t find the springs or shocks. All I can get is Dinan springs, and either Bilstien B8 or koni shocks.
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10-27-2020, 10:40 PM	#30
BSM n54iS Brigadier General 2685 Rep 4,202 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	https://www.dinancars.com/products/s...arts/D100-0497 https://www.ecstuning.com/b-dinan-pa...waApE6EALw_wcB Double and triple check part numbers. There seem to be a few different ones for e92/e90 __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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10-29-2020, 02:35 PM	#39
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Lowering perches mean you sit that amount further into your aux springs...harshness and understeer will result! Simplest way to lower the front end without affecting ride is to switch to xd strut top mounts; they're about 3/8-1/2" shorter than sport mounts, and 1/2-5/8" ish shorter than non-sport ones. Clearly that only works for rwd cars...
	Appreciate 0 Quote

10-30-2020, 09:43 AM	#41
fredcase Captain 261 Rep 776 Posts Drives: Bmw=trash Join Date: Mar 2014 Location: Noyb iTrader: (1)	B14 kit any good? Or is it just a B12 with height adjustment? What about the Koni+H&R spring kits? they have 2 different ones, I'm not sure what the difference is. https://www.tdotperformance.ca/koni-...ering-kit.html https://www.tdotperformance.ca/koni-...ering-kit.html
	Appreciate 0 Quote

10-30-2020, 10:45 PM	#42
bmw335ie90 Lieutenant 535 Rep 432 Posts Drives: 2011 335i M Sport Join Date: Feb 2018 Location: Norcal iTrader: (0)	.
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11-01-2020, 08:48 AM	#44
mweisdorfer Major General 1903 Rep 6,968 Posts Drives: 2007 Black/Black 335i e90 Join Date: Apr 2011 Location: Holly, MI iTrader: (0) Garage List 2007 BMW E90 335i [0.00] 2008 bmw x5 [0.00]	Why not go with the B12 kit & Eibach front & rear sway bars. After the break in period, if you want to stiffen it up even further, then add Monroe rear, upper bump stops. If you want even more, but the BMW sport springs. You can get M3 subframe bushings & M3 diff bushings too to create a stiffer & more connected ride.
	Appreciate 1 thormessiah164.50 Quote