Thread: Ideal Geometry
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Old 02-24-2009, 09:14 AM
parsonsj parsonsj is offline
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Default Just dabbling...

I occasionally dabble in design (consulting only) for folks who want to build their own suspensions. I've been working on one that uses C5 components. Those numbers look something like this:

Roll Center location Static: +2.0"
Roll Center Migration In Roll: 0.62" / Degree of Roll
Roll Center Height in Dive and Lift: just about 1 to 1
Caster: ~8 Deg.
Caster gain per inch of travel: 0.5+ Deg Pos. / Inch of Travel
Camber: -1 Deg (adjustable to whatever)
Camber gain per inch of travel: 0.9+ Deg Neg. / Inch of Travel
Toe: whatever
Bump steer: less than .005 for up 1.5" dive, .010 for up to 1" lift, .020 for 2"
King Pin angle: 9.9 Deg.
Anti-dive: 23%

As Matt mentioned, the hardest part of the whole design is the packaging: finding workable racks, getting the engine in the car with the rack, figuring out how to get a workable sway bar, and, in general, making sure none of the parts hit each other as the front suspension moves.

jp
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