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SVT Shelby GT500
Maximum Motorsports S197 K-Member
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<blockquote data-quote="Tob" data-source="post: 14513289" data-attributes="member: 83412"><p>Tire/wheel combinations aside, the springs are what is driving the ride height, not inner pivot location.</p><p></p><p>When you lower an S197 up front you are essentially shortening the distance between the wheel axis and the strut tower top. The front control arm is rotating upwards at the spindle but the axis it rotates on (at the K-member) stays the same which causes the camber to become more negative. Among other things, it also has an impact on the front roll center. Take a look at the following sketch (disregard the "Fox" style spring location for a moment) and note how the slope of the front control arm changes after lowering the ride height via a spring change, etc.</p><p></p><p><img src="http://www.miracerros.com/mustang/t_rollcenter.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>As the spindle is moved upward the instantaneous and roll center deviate from the stock location. By raising the inner pivot at the K-member (in this case either 5/8" or 1-3/8" higher than stock) on a lowered vehicle you better optimize the camber curve as well as the roll center. Read the following link through a couple of times. You'll see the importance of roll center height(s) by the last paragraph and better understand what happens up front as well as where you would be with a panhard bar or a Watts link and how the front and rear are related.</p><p></p><p><a href="http://www.miracerros.com/mustang/t_rollcenter.html" target="_blank">http://www.miracerros.com/mustang/t_rollcenter.html</a></p><p></p><p></p><p></p><p></p><p>You got it Roger. I figured you'd have a plan in place...</p></blockquote><p></p>
[QUOTE="Tob, post: 14513289, member: 83412"] Tire/wheel combinations aside, the springs are what is driving the ride height, not inner pivot location. When you lower an S197 up front you are essentially shortening the distance between the wheel axis and the strut tower top. The front control arm is rotating upwards at the spindle but the axis it rotates on (at the K-member) stays the same which causes the camber to become more negative. Among other things, it also has an impact on the front roll center. Take a look at the following sketch (disregard the "Fox" style spring location for a moment) and note how the slope of the front control arm changes after lowering the ride height via a spring change, etc. [img]http://www.miracerros.com/mustang/t_rollcenter.jpg[/img] As the spindle is moved upward the instantaneous and roll center deviate from the stock location. By raising the inner pivot at the K-member (in this case either 5/8" or 1-3/8" higher than stock) on a lowered vehicle you better optimize the camber curve as well as the roll center. Read the following link through a couple of times. You'll see the importance of roll center height(s) by the last paragraph and better understand what happens up front as well as where you would be with a panhard bar or a Watts link and how the front and rear are related. [url]http://www.miracerros.com/mustang/t_rollcenter.html[/url] You got it Roger. I figured you'd have a plan in place... [/QUOTE]
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