Will E90 328i non-sport shocks & springs fit on an E90 335i?

Drivaar · 12-17-2016, 11:04 AM

I want to pair them with 225/45/R17 [front] + 245/40/R17 [rear].

Thank you!

6ixSpd · 12-17-2016, 03:04 PM

They will bolt up, yes. But why the hell would you want to do this? Get the proper shocks and springs.

Drivaar · 12-17-2016, 08:17 PM

To soften the ride cheaply.

It seems like basically there are ZERO aftermarket parts to soften the ride, so this is one solution.

BSM n54iS · 12-18-2016, 12:02 AM

Why not see if the f30 shock/spring combo fits?

Drivaar · 12-18-2016, 12:41 AM

Why 328? Just because I was able to find a set of 328 shocks/springs available, so wanted to see if I could just use that instead of buying a whole new set.

thakid22 · 12-18-2016, 09:24 PM

Quote:

Originally Posted by Drivaar

To soften the ride cheaply.

It seems like basically there are ZERO aftermarket parts to soften the ride, so this is one solution.

The major problem with this is the rear spring rate. Sport package rear springs are immensely stiffer than their non-sport counterparts. Putting non sport shocks on a sport rear spring will result in moderately reduced compression rates back there. I think this is what you are gunning for as it would soften bumps quite a bit. However, the non sport shocks will not have nearly enough rebound damping to cope with controlling the recoil of those high rate rear sport springs. This will lead to a loss of control, composure, and induce hops, bounce, and float. To know what this feels like drive an F30 with base suspension, especially an xdrive.
Not a desirable dynamic at all.

I suggest adding Koni FSD shocks to replace your sport units and keeping your sport springs.
I put FSD on my 330i with sport package and it vastly refined the ride quality. The ride was a smooth as any Accord/Altima/Mazda6 while retaining great handling and dececent composure on bad roads. Body roll, squat and brake dive were also minimized.

You sound like a perfect candidate for the FSD's! Read up on them. I'm sure they will suit you well.

mike-y · 12-29-2016, 03:46 PM

Also, the 328i is a few hundred lbs lighter than the 335i, and the front springs will be too soft for a 335i. They will make the car sit lower in the front, and may also bottom out more.

I'd also look into koni FSD's for your situation.

E60525d · 01-01-2017, 04:46 AM

Or will it be worth just replacing the shocks to the non sport one's? Will this also soften the ride?

E60525d · 01-02-2017, 05:27 AM

Quote:

Originally Posted by E60525d

Or will it be worth just replacing the shocks to the non sport one's? Will this also soften the ride?

Any thoughts?

01-02-2017, 10:33 AM

Quote:

Originally Posted by E60525d

Or will it be worth just replacing the shocks to the non sport one's? Will this also soften the ride?

Thats a terrible idea.

E60525d · 01-03-2017, 07:22 AM

Why is that? Please expand?

mike-y · 01-03-2017, 11:17 AM

if you are only looking for comfort, installing just the koni FSD's should soften the ride. Most people want to also improve handling and appearance, and opt to swap out springs also. But keeping the factory non-sport springs with the new shocks won't hurt anything at all, and it still will probably handle better than with the stock shocks anyway.

Also if you are still running on the factory run-flat tires, those are also contributing to the harsh ride. Getting regular tires (with a plug kit and can of fix-a-flat in the trunk) will help with comfort.

12-17-2016, 11:04 AM	#1
Drivaar Lieutenant 82 Rep 463 Posts Drives: BMW Join Date: Aug 2010 Location: Earth iTrader: (0)	Will E90 328i non-sport shocks & springs fit on an E90 335i? I want to pair them with 225/45/R17 [front] + 245/40/R17 [rear]. Thank you!
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12-17-2016, 03:04 PM	#2
6ixSpd Save the manuals! 6076 Rep 6,770 Posts Drives: '16 M3, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	They will bolt up, yes. But why the hell would you want to do this? Get the proper shocks and springs. __________________ '16 M3 \| '23 718 Spyder Past: E92 M3, F87 M2, E39 M5, etc
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12-17-2016, 08:17 PM	#3
Drivaar Lieutenant 82 Rep 463 Posts Drives: BMW Join Date: Aug 2010 Location: Earth iTrader: (0)	To soften the ride cheaply. It seems like basically there are ZERO aftermarket parts to soften the ride, so this is one solution.
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12-18-2016, 12:02 AM	#4
BSM n54iS Brigadier General 2686 Rep 4,203 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	Why not see if the f30 shock/spring combo fits? __________________ '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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12-18-2016, 12:41 AM	#5
Drivaar Lieutenant 82 Rep 463 Posts Drives: BMW Join Date: Aug 2010 Location: Earth iTrader: (0)	Why 328? Just because I was able to find a set of 328 shocks/springs available, so wanted to see if I could just use that instead of buying a whole new set.
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12-29-2016, 03:46 PM	#7
mike-y just another bmw douche bag 198 Rep 3,640 Posts Drives: 1.9L of fury Join Date: Nov 2008 Location: Los Angeles, CA iTrader: (4)	Also, the 328i is a few hundred lbs lighter than the 335i, and the front springs will be too soft for a 335i. They will make the car sit lower in the front, and may also bottom out more. I'd also look into koni FSD's for your situation.
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01-01-2017, 04:46 AM	#8
E60525d Lieutenant Colonel 293 Rep 1,537 Posts Drives: 330d M Sport LCI Join Date: Mar 2010 Location: UK iTrader: (0)	Or will it be worth just replacing the shocks to the non sport one's? Will this also soften the ride?
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01-03-2017, 07:22 AM	#11
E60525d Lieutenant Colonel 293 Rep 1,537 Posts Drives: 330d M Sport LCI Join Date: Mar 2010 Location: UK iTrader: (0)	Why is that? Please expand?
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01-03-2017, 11:17 AM	#12
mike-y just another bmw douche bag 198 Rep 3,640 Posts Drives: 1.9L of fury Join Date: Nov 2008 Location: Los Angeles, CA iTrader: (4)	if you are only looking for comfort, installing just the koni FSD's should soften the ride. Most people want to also improve handling and appearance, and opt to swap out springs also. But keeping the factory non-sport springs with the new shocks won't hurt anything at all, and it still will probably handle better than with the stock shocks anyway. Also if you are still running on the factory run-flat tires, those are also contributing to the harsh ride. Getting regular tires (with a plug kit and can of fix-a-flat in the trunk) will help with comfort.
	Appreciate 0 Quote