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New Edge Cobras
'03 IRS brace install
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<blockquote data-quote="Snake Eyes" data-source="post: 429590" data-attributes="member: 3410"><p>Basically when you are trying to accelerate, your drive shaft turns, applying torque to the differential. Which in turn converts that power to the two half-shafts which are attached to the wheel. Well in the Cobra with the IRS the differential is not structurally (the solid axle) attached to the hubs and wheels. So the differential must be held in place while the wheels are allowed to move independently (on the A arms). Well as it turns out, the mount and bushings that SVT used were quite compliant (soft) and allowed the differential to rotate a few degrees under hard acceleration due to the rotational torque applied to it by the drive shaft.</p><p></p><p>So this brace was modified from it's original form to add 2 additional mount points for the differential. SVT also used higher durometer (harder) bushings to stiffen up the movement of the IRS components for the 03 cobra. So adding these pieces helps reduce pinion wind-up, which in turn lessens the wheel hop. Here is a summary of IRS suspension break down. This is what William R Mathis (author: Mustang Performance Handbook: Engine and Drivetrain Modifications for Street, Drag Strip or Road Racing Use) says. The only point I disagree with is that replacing all four subframe bushings doesn't increase NVH that much, many have done all 4 MM bushings with great results.</p><p></p><p></p><p></p><p>Hope this helps,</p><p></p><p>Kyle</p></blockquote><p></p>
[QUOTE="Snake Eyes, post: 429590, member: 3410"] Basically when you are trying to accelerate, your drive shaft turns, applying torque to the differential. Which in turn converts that power to the two half-shafts which are attached to the wheel. Well in the Cobra with the IRS the differential is not structurally (the solid axle) attached to the hubs and wheels. So the differential must be held in place while the wheels are allowed to move independently (on the A arms). Well as it turns out, the mount and bushings that SVT used were quite compliant (soft) and allowed the differential to rotate a few degrees under hard acceleration due to the rotational torque applied to it by the drive shaft. So this brace was modified from it's original form to add 2 additional mount points for the differential. SVT also used higher durometer (harder) bushings to stiffen up the movement of the IRS components for the 03 cobra. So adding these pieces helps reduce pinion wind-up, which in turn lessens the wheel hop. Here is a summary of IRS suspension break down. This is what William R Mathis (author: Mustang Performance Handbook: Engine and Drivetrain Modifications for Street, Drag Strip or Road Racing Use) says. The only point I disagree with is that replacing all four subframe bushings doesn't increase NVH that much, many have done all 4 MM bushings with great results. Hope this helps, Kyle [/QUOTE]
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'03 IRS brace install
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