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Old 07-10-2020, 02:55 PM   #372
Var
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Join Date: Feb 2017
Drives: 2017 Subaru BRZ PP
Location: San Mateo, CA
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Quote:
Originally Posted by timurrrr View Post
I don't know a simple answer, especially now that you have non-standard geometry in the rear, that changed motion ratios.

A complicated answer that I do know is:
  1. Find out the Nm/º stiffness of the sway bar (may be able to calculate from its diameter)
  2. You calculate how much leverage the end links have on the sway bar at ride height (accounting for the angle between the sway bar and the end links)
  3. You account for the motion ratio of the end link
  4. To answer "how much spring is this equivalent to", you also need to account for the motion ratio of the strut
Something like this super-complicated calculator might help if you find all the right measurements for your car.
Aren't the motion ratios preserved if the lengths of the arms and pickup points are the same? The RLCA has 3 holes to choose from to mount the shock. I believe middle hole provides stock leverage, but I'd have to go read through the manual to be sure. Unless something else changes the motion ratios?
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