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Cobra Forums
2013-14 Shelby GT500
Suspension Opinions
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<blockquote data-quote="BMR Tech" data-source="post: 14222113" data-attributes="member: 124691"><p>Moving the relationship of the axle and the chassis - from side to side, will cause thrust angle change. </p><p></p><p>Spec for S197 thrust angle is .50 to -.50</p><p></p><p>Most OEM S197's will fall between 0 and .25. </p><p></p><p>You don't see people having "issues" simply because they are not throwing the thrust angle off enough to cause a change in the steering (straight ahead on the road) and they are likely still within "spec".</p><p></p><p>Performance-wise, having the thrust angle to zero will result in the most predictable driving conditions, and help with contact patch consistency. In the grand scheme of things, we are splitting hairs here.</p><p></p><p></p><p></p><p>If your LCA are perfectly level, or SLIGHTLY down on the axle end, then I suggest using an upper control arm mount that has a lower mounting position of about 1/2" to 3/4" lower than the OEM position. </p><p></p><p>If your LCA are higher at the axle side, like 0 to 3/4".... then I recommend using LCA Brackets in the first/top position.</p><p></p><p>If your LCA are higher at the axle side, by >3/4"....then I recommend using LCA Brackets AND the BMR UCA Mount, in the upper position (our UCA Mount is designed for use with our LCA Brackets - as we raise the UCA mounting point slightly, compared to OEM).</p></blockquote><p></p>
[QUOTE="BMR Tech, post: 14222113, member: 124691"] Moving the relationship of the axle and the chassis - from side to side, will cause thrust angle change. Spec for S197 thrust angle is .50 to -.50 Most OEM S197's will fall between 0 and .25. You don't see people having "issues" simply because they are not throwing the thrust angle off enough to cause a change in the steering (straight ahead on the road) and they are likely still within "spec". Performance-wise, having the thrust angle to zero will result in the most predictable driving conditions, and help with contact patch consistency. In the grand scheme of things, we are splitting hairs here. If your LCA are perfectly level, or SLIGHTLY down on the axle end, then I suggest using an upper control arm mount that has a lower mounting position of about 1/2" to 3/4" lower than the OEM position. If your LCA are higher at the axle side, like 0 to 3/4".... then I recommend using LCA Brackets in the first/top position. If your LCA are higher at the axle side, by >3/4"....then I recommend using LCA Brackets AND the BMR UCA Mount, in the upper position (our UCA Mount is designed for use with our LCA Brackets - as we raise the UCA mounting point slightly, compared to OEM). [/QUOTE]
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