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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > SP Lowering Perches [Supreme Power mini review]



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      09-12-2011, 10:13 PM   #1
IllLojik
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SP Lowering Perches [Supreme Power mini review]

Fast shipping, great prices.
The box arrived today and I immediately got to installing.



Mine came with two of these giant washers that I had no idea what to do with. I skipped them and re-installed everything that was from the old perch.



Comparing the old and the new. SP's are HUGE and has more heft than stock.






Video of uh.. a comparison between stock and SP, so you get some idea of the heft I guess.



Overlay of stock on SP
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      09-12-2011, 10:30 PM   #2
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Installed



Best Before pic I have at the moment


After


I'm thinking because I had the car up for a minute the Springs need resettling. When I did the "finger test", I fit a whole Shocker in there where before I could only fit two




Car actually sat higher for a sec. I'm gonna give it a day or so to settle back to stock and see the results. Install by myself and no power tools took 4 hours.

Just thought I'd throw together a lil "This is what you get." I have Eibach's on the way, so I guess I should have been patient. But I figured I'd let the crowd see what this does for a Stock car on sports suspension. Will give an end of the the week update.

Last edited by IllLojik; 09-12-2011 at 10:39 PM.
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      09-13-2011, 12:28 AM   #3
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Looks good but the extra "heft" is bad.
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      09-13-2011, 03:19 PM   #4
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Anyone done this on a xi?
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      09-13-2011, 04:21 PM   #5
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Quote:
Originally Posted by fefo25 View Post
Anyone done this on a xi?
So far no, because they aren't built for Xi's. I don't know what the strut setup for an XI looks like, but I'm sure someone can figure a way to finagle one.
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      09-13-2011, 08:13 PM   #6
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The day after:



It settled nicely.Though it emphasizes how high my stock rear is. I'll leave it this way for now.
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      09-14-2011, 06:39 AM   #7
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Mine didn't come with those washers.. and I wouldn't know where to use them either. Maybe SP can explain?
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      09-16-2011, 02:20 AM   #8
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awesome post! thanks for sharing.
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      09-18-2011, 10:46 AM   #9
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haha a whole shocker in there...nice man I plan to pick these up soon.
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      09-18-2011, 10:23 PM   #10
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So since you lowered it a little does it now mean you have to get an alignment?
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      09-18-2011, 11:45 PM   #11
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Quote:
Originally Posted by Simple3 View Post
So since you lowered it a little does it now mean you have to get an alignment?
No alignment needed. All it does is move the strut housing up .5inch.
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      11-24-2011, 02:09 AM   #12
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Quote:
Originally Posted by NiVeDh View Post
Looks good but the extra "heft" is bad.
Please elaborate.
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      11-26-2011, 12:44 PM   #13
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Quote:
Originally Posted by mapleridge View Post
Please elaborate.
indeed. Please. It's not like I'm adding a 10lb piece of lead to wheels or anything.
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      11-26-2011, 02:08 PM   #14
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did the car settle and lower more than previously?
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      11-29-2011, 11:33 AM   #15
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Quote:
Originally Posted by mapleridge View Post
did the car settle and lower more than previously?
There's really nothing to settle as you are not changing the spring. Just moving the position of the assembly.
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      11-30-2011, 03:20 AM   #16
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Quote:
Originally Posted by IllLojik View Post
There's really nothing to settle as you are not changing the spring. Just moving the position of the assembly.
So then how come you said your car was higher than before after installing them?
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      11-30-2011, 02:55 PM   #17
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Quote:
Originally Posted by mapleridge View Post
So then how come you said your car was higher than before after installing them?
The springs don't need to settle any further than they already are before installation. The purpose of the lowering perches is to basically shave off 1/4 of material that is taking space between the strut/spring assembly and the housing.

Gaze upon my Picasso esque awesomely crude illustration:




As you see, the springs remain the same, just the piece at the top looses some of it's fat so the car sits closer to the spring assembly. Therefore lowering without shorter springs.
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      11-30-2011, 04:09 PM   #18
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Quote:
Originally Posted by IllLojik View Post
The springs don't need to settle any further than they already are before installation.
(Emphasis mine.)

That was a really good illustration actually. Artistic!

But, I'm confused because you don't seem to be addressing his question. He's asking about additional settling after the install, and you're saying that the springs don't need to settle past where they were before the install?? What?

What exactly is your theory on spring settling?

Did you tighten the suspension bolts before lowering the car to the ground?
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      12-01-2011, 02:55 AM   #19
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Quote:
Originally Posted by IllLojik View Post
The springs don't need to settle any further than they already are before installation. The purpose of the lowering perches is to basically shave off 1/4 of material that is taking space between the strut/spring assembly and the housing.

Gaze upon my Picasso esque awesomely crude illustration:




As you see, the springs remain the same, just the piece at the top looses some of it's fat so the car sits closer to the spring assembly. Therefore lowering without shorter springs.
Thanks for the explanation, but in your review you said after the install it was higher than before the install. Is that really the case? That's all I'd like to know.
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      12-01-2011, 11:36 PM   #20
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Springs do need to settle in to the new perch. I guess OP meant the new springs if installed, need to settle in before reaching final compression rate. The perch will be set after driving for a day or so. It's like if you lift your car, the car will sit little higher and settle.
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      12-02-2011, 11:50 AM   #21
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Quote:
Originally Posted by twofast2s View Post
Springs do need to settle in to the new perch. I guess OP meant the new springs if installed, need to settle in before reaching final compression rate. The perch will be set after driving for a day or so. It's like if you lift your car, the car will sit little higher and settle.
Yes Exactly.
Sorry I didn't get his question the 1st time.
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      12-02-2011, 02:23 PM   #22
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Quote:
Originally Posted by twofast2s View Post
Springs do need to settle in to the new perch. I guess OP meant the new springs if installed, need to settle in before reaching final compression rate. The perch will be set after driving for a day or so. It's like if you lift your car, the car will sit little higher and settle.
If you say so... but it's not what I observe. I had the SP lowering perch installed too, on brand new OE springs. Any settling that has occurred since driving back is 1/16" or less, which is within measuring error. It's been a few weeks now.

In Illlojik's pictures I see almost 1" of drop in the first 24 hours.

Are you guys tightening control arm bolts before resting the car back on the ground?
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