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      01-05-2021, 09:29 PM   #8
tharptroy
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Drives: 2009 335i
Join Date: Sep 2008
Location: Dallas, TX

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Quote:
Originally Posted by Tambohamilton View Post
I think the best 'fixes' will be taller tyres (smaller wheels if poss) first. Then spring cups to raise the suspension on your standard springs as others have suggested. This raises the suspension off the bump stops ('auxiliary springs') which are normally engaged at ride height. The trade off will be more body roll and less responsive handling.

The springs on your car should be C8, front and rear. These are the longest stock springs for the e9x platform, but also the stiffest of the non-sport ones (other than some e91 rear springs); front 365mm and 144lb/in, rear 340mm and 550lb/in. So none of the stock springs will be able to maintain current ride height and reduce spring rate. You could go with softer springs, but you'd just end up running deeper into the bump stops which would be counter-productive.

I can't seem to find any other OE(M) springs which would work for you, so I think wheels/tyres and spring cups are your best bet
I am somewhat similarly interested in raising my rear suspension in particular, but I would not be opposed to a stiffer spring, as I am expecting to carry a fair bit of extra weight in the rear.

My car is a 2009 e90 335i M sport with auto trans

I have looked into this previously but have not had success in positively identifying a suitable spring.

Thanks in advance for any suggestions you have to offer!