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Twingo Technical & Detailing Information
Suspension & Brakes
AST, BC Racing solid topmount effects on camber/caster angle
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<blockquote data-quote="singlespeed" data-source="post: 142153" data-attributes="member: 264"><p>Heres a clio AST solid topmount, just like the BC ones in their effect on the geometry. Instead of the bearing being central within the topmount, it is offset to the side, allowing the top of the strut to be off set from the original position.</p><p><img src="https://farm8.staticflickr.com/7430/8714506471_a6c59d8b45_o_d.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>If the ride height was the same as the standard suspension* moving the top mount will ...</p><p>1. As pictured here, this has moved the top of the strut backwards and so increased the caster. However, the strut hasn't moved inboard or outboard so camber will be the same as standard.</p><p></p><p>I'm half way between 1 and 2, so increased -ve camber and increased caster</p><p></p><p>2. The top of the strut has moved inboard, so negative camber will have increased. As the strut hasn't moved forwards or backwards, caster will be the same.</p><p></p><p>3. This has moved the top of the strut forwards and decreased the caster. However, the strut hasn't moved inboard or outboard so camber will be the same as standard.</p><p></p><p>4. The top of the strut has moved outboard, so negative camber will have decreased or maybe become positive (bad bad bad). As the strut hasn't moved forwards or backwards, caster will be the same.</p><p></p><p>*reducing ride height will exagerate the angles as the vertical offset between the lower ball joint and the topmount will still be the same, but the distance between them will be less... therefore increased angles</p></blockquote><p></p>
[QUOTE="singlespeed, post: 142153, member: 264"] Heres a clio AST solid topmount, just like the BC ones in their effect on the geometry. Instead of the bearing being central within the topmount, it is offset to the side, allowing the top of the strut to be off set from the original position. [img]https://farm8.staticflickr.com/7430/8714506471_a6c59d8b45_o_d.jpg[/img] If the ride height was the same as the standard suspension* moving the top mount will ... 1. As pictured here, this has moved the top of the strut backwards and so increased the caster. However, the strut hasn't moved inboard or outboard so camber will be the same as standard. I'm half way between 1 and 2, so increased -ve camber and increased caster 2. The top of the strut has moved inboard, so negative camber will have increased. As the strut hasn't moved forwards or backwards, caster will be the same. 3. This has moved the top of the strut forwards and decreased the caster. However, the strut hasn't moved inboard or outboard so camber will be the same as standard. 4. The top of the strut has moved outboard, so negative camber will have decreased or maybe become positive (bad bad bad). As the strut hasn't moved forwards or backwards, caster will be the same. *reducing ride height will exagerate the angles as the vertical offset between the lower ball joint and the topmount will still be the same, but the distance between them will be less... therefore increased angles [/QUOTE]
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Twingo Technical & Detailing Information
Suspension & Brakes
AST, BC Racing solid topmount effects on camber/caster angle
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