Quote:
Originally Posted by Muff Muff
From a physics standpoint, having your struts set with a different preload is effectively going to make the more compressed side stiffer than the longer, less compressed side. It's not something I've ever done it practice, but I also wouldn't think that it'd be advisable if having a level ride is your only goal. When it comes to vehicle dynamics, having everything equal and balanced is key.
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Ah, the "pre-load myth" lives on - and justified as "physics," no less! Back to class with you, sir!
The amount you compress the spring to fit it into the coilover assembly prior to installation is irrelevant. It does not change the spring rate. With the weight of the truck resting on the spring, it will be compressed the same amount no matter how much "pre-load" was placed on it at installation.
Increasing the "pre-load" in effect simply moves the position of the lower spring perch upward. Being that the compressed spring will be the same height under the same load, the overall height of the truck is raised as a result. Has nothing to do with any increased "stiffness" of the spring.
Leveling by adding spacers or by increasing the "pre-load" accomplishes exactly the same thing -- it just moves the effective position of the lower spring perch on one side of the vehicle in relation to the other.
Edit: Dezertbomber beat me to the punch!