Re: Oops - Viggen Tire Question as New Topic (duh) - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Oops - Viggen Tire Question as New Topic (duh)
Posted by Dean (more from Dean) on Wed, 12 Feb 2003 13:37:28
In Reply to: Oops - Viggen Tire Question as New Topic (duh), jc, Wed, 12 Feb 2003 13:01:17
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The sequence looks good. The labor to install the urethane bushings might be a surprise.
All that you are going to adjust is the toe-in. With performance tires and hard bushings you will want very little toe-in. With stock bushings and stock toe-in, the loads from the running toe-in will cause deflection of the bushings which reduces the running toe-in to be less than the static toe-in. If you kept the spec static toe-in, you would end up with higher running toe-in with the hard bushings. Increased running toe-in could cause tire wear and instability in the wet or on ice.
If after that the vehicle pulls to one side, then the cambers are not balanced. This is differential camber. With a hydraulic jack kit, the subframe could be distorted to move the bushing mount in or out*, or the mounting holes for the top mount could be slotted. In either case, changing the camber would upset the toe-in and steering wheel centering, and that would need to be corrected too.
* The subframe is hot dip galvanized and that leaves it dead soft. It bends all to easily. I don't know that anyone has done this, other than those who have had their Abbott subframe braces bent, which can pull the frame inward :)
posted by 208.24.179...
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