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      01-09-2017, 12:12 PM   #91
HP Autosport
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP Racing, Brembo, GIAC, Nitron, Ohlins, Pagid, www.hpautosport.com

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Quote:
Originally Posted by CarJunkie View Post
Question for those of you who have adjusted the rear ride height. . . See photo:



The threaded spring perch in photo is referred to in the Ohlins instructions as the "Preload Adjuster" but to me this must be the primary determinant of ride height since it carries the spring. The threaded shock body would adjust preload.

According to Ohlins, 1 full rotation is 1.5mm height.

So for example, to lower the car 1.5mm, I would do one full rotation of the threaded perch above, moving the perch closer to the frame. To return the preload to the recommended amount, I would also turn the threaded shock body 1 full turn to maintain the same unloaded spring length.

Not sure why they would refer to the threaded spring perch as the "Preload Adjuster." Am I missing something?
For the 1M rear suspension setup the height adjuster is both a preload adjuster and height adjuster. Damper length will not determine preload.

Height can only be adjusted at the height adjuster, NOT at the damper.
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