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      05-25-2016, 11:48 PM   #60
mdputnam
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Drives: 135i & M235i Convertibles
Join Date: Dec 2011
Location: SoCal

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Quote:
Originally Posted by rwalker View Post
know it's not intuitive, but I swear my ride height has increased with the F8x tension struts.
Now just think about it for a minute. When changing the length of the tension strut the pivot point is the top of the MacPherson strut. With the M lower control arm and the stock tension strut you have pulled the bottom of the MacPherson strut towards the front of the car (more castor) shortening the vertical distance from the top of the MacPherson strut to the ground. With the longer M tension strut you have pushed the bottom of the MacPherson strut towards the back of the the car (less castor, closer to vertical) increasing the vertical distance from the top of the strut to the ground.

Here is a crude pictogram of the MacPherson strut looking at the side of the car, keep in mind the MacPherson strut doesn't change length when the car is static.

Short tension strut.
More castor, less vertical height
' /
/

Long tension strut
Less castor, more vertical height
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