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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > What are the cons of using these to lower the front?



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      08-21-2010, 08:58 PM   #1
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Question What are the cons of using these to lower the front?

Other than needing an alignment is there anything to worry about using these to get a drop on your front?

http://www.supremepowerparts.com/0/0...me+Power+Parts
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      08-21-2010, 09:06 PM   #2
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The link doesn't work for me. I assume they're springs or coilovers.

The only other con besides from getting an alignment as you mentioned is that if the drop is aggressive, it makes it more challenging to enter/exit deep driveways.
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      08-21-2010, 09:10 PM   #3
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Odd, the link works for me just fine. They are Front Lowering Spring Perchs. Basically let's the suspension up into the engine a little more, hence drops the front.

According to the site...



"Front Lowering Spring Perch BMW

Notes:

Will NOT work with coilover kits

***Spring perches lowers car approximately 10 - 15 mm or (0.4 - 0.6")***

-Want to lower the front of your car, but keep your factory/OEM suspension?
-Want to lower the front end a bit more, after adding aftermarket suspension (non-coilover set up), but can't do it

Factory/OEM fitment- - to be used with shock and spring combination (oem or aftermarket)."
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      08-21-2010, 09:11 PM   #4
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Hmm, never heard of such device before. I retract my earlier post then as I have no experience with this thing.
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      08-21-2010, 09:12 PM   #5
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Yeah, I can't really find anything saying one way or another. I'm very curious as this would be a great mod to get rid of that fat gap in the front without spending loads of $$$.
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      08-21-2010, 09:32 PM   #6
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Its a great way to lower the front and make it look equal to the back. Basically it just makes the spring sit a little lower on the shock so theres no real danger there. They are pretty safe.

Common applications would be with a set a springs, let say and you still find that the front has a little more gap than the back, then this is the solution.

A couple of people had them on their Audis on Audizine. Very popular modification in Europe too.
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      08-21-2010, 10:04 PM   #7
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So I have nothing to worry about with the geometry or setup of the way the car handles etc.? Just put these in and get aligned? Because that would rule.
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      08-21-2010, 10:16 PM   #8
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thats it !
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      08-22-2010, 12:19 AM   #9
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Some guy already did it, it's in the DIY section (I'm guessing it's similar?):

http://www.e90post.com/forums/showth...ng+spring+seat

but for some reason, after the guy's order, no one was able to get it from the German site no more.

Nice to know we can now order them
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      08-22-2010, 02:30 AM   #10
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wow, never seen this before. waiting for more people to chime in with their opinions.
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      08-22-2010, 02:41 AM   #11
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lowering shells have been around for ages, i remember these for sale for e30 almost 10 odd years ago

Never considered the application for E9xs though
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      08-22-2010, 12:06 PM   #12
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I read this very informative article on Dinan's site that talks about suspension travel. It states you need a shorter bump stop for a proper spring perch setup. Cutting it is not the solution. You would need one that's .5" shorter than the stock ones.

I have no idea how tall the stock ones are to begin with but if for instance the M3 bump stop is .5" shorter you should be able to use those. Even the BMW Performance Suspension Kit comes with new bump stops.
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      08-22-2010, 07:29 PM   #13
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Very interesting. Subscribed...
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      08-23-2010, 02:24 AM   #14
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Comparing suspension diagrams of the e92 335i and M3 it seems the bump stops AKA "Additional shock absorber" OR "Auxiliary shock absorber" are different in size. The one for the M3 seems smaller.

M3, figure #8
http://www.realoem.com/bmw/showparts...05&hg=31&fg=10

335i, figure #10
http://www.realoem.com/bmw/showparts...67&hg=31&fg=10

Can confirm this? I wonder if the dealerships parts departments have these in stock so I can look at them in person to compare the actual height difference.
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      08-23-2010, 07:48 AM   #15
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Nice find, never seen them before but I'm willing to try untill I get some coilovers or another setup, a good solution for the sports suspension to get rid of the gap up front
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      08-23-2010, 10:45 AM   #16
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Having this on my car would kill my shocks though. I keep hearing stories about people with some decent mileage putting new springs on (or spring settling in a different range of the shocks) and the shocks blowing within a few thousand miles.

I have 48k on the clock with my suspension, so I would assume something similar would happen.

Just another reason to go with performance suspension for me.
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      08-23-2010, 03:26 PM   #17
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This shouldn't affect your suspension like short springs would. The springs actually drop your car so the struts are compressed a bit more than normal and then have less area to travel and wear out quickly.

These would allow your suspension to sit at its normal levels by bringing the suspension up into the car more hence giving you a drop.
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      08-23-2010, 04:44 PM   #18
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That's a lot of work just to drop the front half an inch. Also include the alignment cost to the $70 of these perches. So one might as well replace the springs while at it, so that means replacing springs in back too.
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      09-02-2010, 02:48 PM   #19
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I'm currently using the H&R Touring Cup Kit on my e92, I'm really considering this as an option as my front still has a slight gap where as my rears are perfect with no gap. I think that these would put my front to exactly where I want. If it doesn't or if it makes it look/feel worse, I'll just remove them.
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      09-02-2010, 03:29 PM   #20
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Anyone who thinks lowering the front by 15mm and retaining the ride-height in the rear won't affect vehicle dynamics don't know what they're talking about.
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      09-02-2010, 04:06 PM   #21
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Quote:
Originally Posted by The HACK View Post
Anyone who thinks lowering the front by 15mm and retaining the ride-height in the rear won't affect vehicle dynamics don't know what they're talking about.
As much as I like the idea of these perches, I have to agree. There is a reason BMW sets the car up the way they do and I believe it has to do with stability. Remember the 91-95 Toyota 4Runners that were always ass down...it was becuase that was the only cheap way Toyota could get them to handle well.
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      09-02-2010, 04:22 PM   #22
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Remember that in order to go lower you have to add stiffness to the suspension including spring rate and mated shocks for good shock travel so it might work well if you use a good combo and fine tune your suspension with a good alignment.
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