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Old 07-26-2007, 08:43 AM   #1
jpr
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Ride Height Data Collection

Provide me some data on ride height, and I'll compile and analyze it. Hopefully then there will be a definitive data based answer to the recurring question of whether or not the left side is higher than the right side, and if so by how much.

For reference, this is an outgrowth of this thread started by Alex - http://forum.e46fanatics.com/showthread.php?t=489276

If you want to participate, here's what you need to do:
(1) Provide model type of your car plus the build date (preferred) or model year
(2) State what springs are in your car
(3) Park on a levelish surface and measure your ride height at each wheel in accordance with the attached method. Metric is preferred over inches, but either will work. Please measure to within 2mm or 1/16 inch.

A good example of the data needed is this as posted by SLO Town on his 2003 330Ci with OEM sport springs - http://forum.e46fanatics.com/showpos...4&postcount=27
Quote:
LF = 610mm
RF = 607mm
LR = 604mm
RR = 604mm
Once enough people have posted their measurements to provide a statistically relevant sample size, I'll start crunching the numbers.
Attached Files
File Type: pdf How to measure ride height.pdf (24.9 KB, 276 views)
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Old 07-26-2007, 08:45 AM   #2
shady3one3
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Why does it matter? If your car is properly corner balanced you won't have the same ride height at all 4 corners anyway.
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Old 07-26-2007, 09:02 AM   #3
jpr
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Quote:
Originally Posted by shady3one3 View Post
Why does it matter? If your car is properly corner balanced you won't have the same ride height at all 4 corners anyway.
This regarding springs, not coilovers, so corner balancing doesn't enter in to it.

Basically, this is intended finally settle one of those recurring debates that keeps popping up. Read the thread linked to in the original post to see what I'm talking about.

To that end, the point of the thread is solely to collect actual data and present the results, not to debate its relevance or higher meaning.
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Old 07-27-2007, 02:14 PM   #4
ca1242
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I have always believed the "factory lean" as a design feature. We might never know for sure, but at least we can get some stats to somehow satisfy our curiosity. This is a good idea. Here goes mine (using method in PDF):
LF 23-1/8" RF 23-1/8"
LR 22-3/8" RR 22-1/4"

Margin of error ~ 1/16"

For reference, my car has a stock suspension, 40k miles but has a subwoofer box and amplifiers in the trunk, so My rear is probably lower than a stock car (although it shouldn't throw off the left vs. right balance).

So in my case, front is the same height on both sides, rear is 1/8" higher on left. I guess this equates to ~ 3mm 'lean' on the rear.
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Old 10-06-2007, 10:38 PM   #5
djnekkon
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I guess you guys live on the flattest and leveled piece of land on earth . What funny wait to demonstrate how smart can we be. In order to determine it, we nee to apply compression to both springs and check its resintance. larger doesn't mean stronger. I checked mine they are both identical, but I need see which one is stronger Not larger. It ain't over, so we should bring more tests and less talk.
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Old 10-06-2007, 11:09 PM   #6
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Quote:
Originally Posted by djnekkon View Post
I guess you guys live on the flattest and leveled piece of land on earth . What funny wait to demonstrate how smart can we be. In order to determine it, we nee to apply compression to both springs and check its resintance. larger doesn't mean stronger. I checked mine they are both identical, but I need see which one is stronger Not larger. It ain't over, so we should bring more tests and less talk.
huh?
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Old 10-16-2007, 03:02 AM   #7
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Quote:
Originally Posted by djnekkon View Post
I guess you guys live on the flattest and leveled piece of land on earth . What funny wait to demonstrate how smart can we be.
Um, ok????? I think Christopher Columbus is rolling over in his grave.
Quote:
In order to determine it, we nee to apply compression to both springs and check its resintance.
I think the car does a pretty good job at the compression part. Especially since there is no difference in spring rate between the pass/drivers side (identical part number)
Quote:
larger doesn't mean stronger.
I beg to differ.....
Quote:
I checked mine they are both identical, but I need see which one is stronger Not larger.
Again - they are the same exact part. Neither is larger OR stronger.
Quote:
It ain't over, so we should bring more tests and less talk.
Agreed
Quote:
Originally Posted by jpr View Post
huh?
I concure

I personally believe its the battery. My best guess is that those of us with verts or very heavy stereo batteries will tend to have more lean than others. The battery sits almost directly on top of and behind the rear pass spring, which of course would create a sort of lever effect causing the spring to sag over time.

Or perhaps it is just 3am and I am having a delusional fit.
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Old 10-16-2007, 04:30 AM   #8
Alex323Ci
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Quote:
Originally Posted by djnekkon View Post
I guess you guys live on the flattest and leveled piece of land on earth . What funny wait to demonstrate how smart can we be. In order to determine it, we nee to apply compression to both springs and check its resintance. larger doesn't mean stronger. I checked mine they are both identical, but I need see which one is stronger Not larger. It ain't over, so we should bring more tests and less talk.
another genius who thinks there is a left and right spring
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Old 08-12-2008, 04:11 PM   #9
jonlouis00
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My Ride: 2002 325i
(1) 2002 325i Sport Package
(2) Factory Sport Package
LF - 663.6
RF - 663.6
LR - 636.6
RR - 644.6

Mine is lower on driver side, opposite of the discussion but apparently in spec. I don't like it. There is a squeek when I get in so I am going to check for a broken spring.
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Old 08-12-2008, 04:22 PM   #10
TxZHP04
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Quote:
Originally Posted by jonlouis00 View Post
There is a squeek when I get in so I am going to check for a broken spring.
You will most likely find this to be caused by the parking brake. Try getting in and out of the car without the parking brake set (on level ground, of course). If it only occurs with the brake set, well, there's your problem. There are a few threads floating around here on this subject.
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