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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 07-03-2012, 07:27 AM
4Doorz 4Doorz is offline
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Location: Newport News, VA
 
Join Date: Jul 2012
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Mein Auto: 2006 325i
Coil Overs or Springs?

Ok so im about to buy some suspension on my 06 325i.

Im not sure if i want to go with Coil Overs (adjustable) or H&R Springs.

I will be keeping stock wheels and maybe going with spacers on them.

Just looking to see if you guys recommend springs, of what size i would need before rubbing on stock wheels. and what size rear spacers will be good.

Thanks
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  #2  
Old 07-03-2012, 07:32 AM
CALWATERBOY's Avatar
CALWATERBOY CALWATERBOY is offline
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Location: San Francisco
 
Join Date: Aug 2009
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Mein Auto: 2009 E93 N54
Quote:
Originally Posted by 4Doorz View Post
Im not sure if i want to go with Coil Overs (adjustable) or H&R Springs.
If shocks aren't matched to springs, a risky purchase. Even if, do you want old shocks w/new springs?

You're way ahead w/new coilovers + rear, assuming you choose wisely.
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  #3  
Old 07-03-2012, 07:36 AM
4Doorz 4Doorz is offline
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Location: Newport News, VA
 
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Mein Auto: 2006 325i
Ok well this is my first BMW lol, but i have done suspension work to multiple cars before, like coilovers.

and iver always ran coilovers on my previous cars, im just not sure how BMW handle coilovers, i would love to go with them instead of springs cause i love to adjust them when i feel like it.
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  #4  
Old 07-03-2012, 09:29 AM
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CALWATERBOY CALWATERBOY is offline
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Location: San Francisco
 
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Mein Auto: 2009 E93 N54
Quote:
Originally Posted by 4Doorz View Post
Ok well this is my first BMW lol, but i have done suspension work to multiple cars before, like coilovers.

and iver always ran coilovers on my previous cars, im just not sure how BMW handle coilovers, i would love to go with them instead of springs cause i love to adjust them when i feel like it.
Fronts are coilovers, rears not.

Go-to vendors: Ground Control; HP Autowerks.

Poss more important: Limited Slip Differential

Seek and ye shall find the other usual suspension mods, very effective.
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  #5  
Old 07-03-2012, 09:31 AM
4Doorz 4Doorz is offline
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Location: Newport News, VA
 
Join Date: Jul 2012
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Mein Auto: 2006 325i
Right, Fronts are coils, and Rears are shocks with springs to adjust.

Im about to pick up the brand i used on my 96 Jetta and see how they are on a BMW
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  #6  
Old 07-03-2012, 09:36 AM
CALWATERBOY's Avatar
CALWATERBOY CALWATERBOY is offline
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Location: San Francisco
 
Join Date: Aug 2009
Posts: 10,009
Mein Auto: 2009 E93 N54
Quote:
Originally Posted by 4Doorz View Post
Right, Fronts are coils, and Rears are shocks with springs to adjust.

Im about to pick up the brand i used on my 96 Jetta and see how they are on a BMW
Seek advice! Suspension section here often gives good response.
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  #7  
Old 07-03-2012, 09:44 AM
ModBargains III ModBargains III is offline
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Location: La Habra, Ca
 
Join Date: Jan 2012
Posts: 370
Mein Auto: E92, E82, E46, E39
Quote:
Originally Posted by 4Doorz View Post
Ok so im about to buy some suspension on my 06 325i.

Im not sure if i want to go with Coil Overs (adjustable) or H&R Springs.

I will be keeping stock wheels and maybe going with spacers on them.

Just looking to see if you guys recommend springs, of what size i would need before rubbing on stock wheels. and what size rear spacers will be good.

Thanks
As mentioned already in the above posts, the springs wont be matched with the stock shocks, or even a set of shocks you can purchase in the aftermarket as well. Having a spring/shock combo such as a coilover that are valved for the right spring will give you worlds better comfort and performance. If you're looking for something inexpensive that will perform great, that will last a long, long time, and you want something that will give you comfort, I'd look at ST Coilovers, made by KW Suspensions:


*ST Coilovers For BMW E90/E91/E92/E93 3 Series

If you have any questions, don't hesitate to ask, I'll be here to help!
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  #8  
Old 07-03-2012, 11:29 AM
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ECSTuning ECSTuning is offline
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Location: Wadsworth, Ohio
 
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Mein Auto: Hover Car on Wheels
Quote:
Originally Posted by 4Doorz View Post
what size rear spacers will be good.
I have guys running everything from 5mm to 20mm out back on the E90 on stock wheels, your tastes are what dictate the "right sized" spacer. The photo below shows how to measure for spacers.



Once you take the simple measurements you can decided how aggressive you'd like to go. I have everything from simple 2mm spacers all the way up to super aggressive 30mm spacers avaible HERE. Most likely you're going to be in the 12.5mm range, make sure to grab new bolts as you'll need extended wheel bolts. I have kits about half way down the first page which include the proper length wheel bolts.

Quote:
Originally Posted by 4Doorz View Post
Just looking to see if you guys recommend springs, of what size i would need before rubbing on stock wheels
You can lower an E90 petty heavily before the stock wheels begin to rub.

Quote:
Originally Posted by 4Doorz View Post
I will be keeping stock wheels and maybe going with spacers on them.
If that's the case I'd go for a mild spring, going with an aggressive spring is going to destroy the life of your stock struts. H&R Sports (found HERE) are as aggressive as I would suggest on stock struts, and even then remember your struts life is going to be shortened by using the lowering springs on them.

Quote:
Originally Posted by 4Doorz View Post
and iver always ran coilovers on my previous cars, im just not sure how BMW handle coilovers, i would love to go with them instead of springs cause i love to adjust them when i feel like it.
They love quality set ups.

What type of ride are you looking to maintain?

Your entry level coilovers (ST, FK Highsports and Silverlines, etcs) are all going to have a rather firm ride, not uncomfortable but firmer than say the stock sport suspension by a good bit. Stepping into a Bilstein, H&R, FK Plus X, FK Konigsport, KW V2 and V3 set up, etc (your middle to upper tear) coilover system is going to give you greater adjustable (damping) which will allow you to fine tune your ride and maintain a better quality ride.
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