Thread: Ideal Geometry
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Old 02-23-2009, 05:07 AM
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ccracin ccracin is offline
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Maybe I should get this started. These are all guesses on my part to get this going. I am by no means an expert, obviously based on me asking the question. At least these numbers may garner a B... Sh.. or Yeah that will work. Lets see if we can keep this going.

Street
Roll Center location Static +4"
Roll Center Migration In Roll <1" / Degree of Roll
Roll Center Height in Dive and Lift <= The Amount of Dive or Lift
Roll Center to Center of Gravity relationship Short as Possible ** This one is somewhat dependent on the vehicle.
Caster +4 Deg.
Camber -1 Deg
Camber gain per inch of travel 1/2 Deg More Neg. / Inch of Travel
Caster gain per inch of travel 1/4 Deg More Pos. / Inch of Travel
Toe 1/16" In
Ackerman for a given steering input 2 Deg. Per 20 Deg. Of Steering
Bump steer ( amount of toe in or out per unit travel) .015 / Inch Of Travel
King Pin angle 8 Deg.
Scrub radius 1" - 3"
Anti-dive 3 Deg.
Ideal amount of body roll to design for at max lateral-g 3 Deg.

Track
Roll Center location Static +3"
Roll Center Migration In Roll <.75" / Degree of Roll
Roll Center Height in Dive and Lift <= The Amount of Dive or Lift
Roll Center to Center of Gravity relationship Short as Possible ** This one is somewhat dependent on the vehicle.
Caster +5 Deg.
Camber -2.5 Deg
Camber gain per inch of travel 3/4 Deg More Neg. / Inch of Travel
Caster gain per inch of travel 1/4 Deg More Pos. / Inch of Travel
Toe 1/16" In
Ackerman for a given steering input 1 Deg. Per 20 Deg. Of Steering
Bump steer ( amount of toe in or out per unit travel) .015 / Inch Of Travel
King Pin angle 8 Deg.
Scrub radius 0"-1"
Anti-dive 4.5 Deg.
Ideal amount of body roll to design for at max lateral-g 2 Deg.

Auto - X
Roll Center location Static +3"
Roll Center Migration In Roll <.75" / Degree of Roll
Roll Center Height in Dive and Lift <= The Amount of Dive or Lift
Roll Center to Center of Gravity relationship Short as Possible ** This one is somewhat dependent on the vehicle.
Caster +2 Deg.
Camber -3 Deg
Camber gain per inch of travel 1/2 Deg More Neg. / Inch of Travel
Caster gain per inch of travel 1/4 Deg More Pos. / Inch of Travel
Toe 1/16" In
Ackerman for a given steering input 2 Deg. Per 20 Deg. Of Steering
Bump steer ( amount of toe in or out per unit travel) .015 / Inch Of Travel
King Pin angle 8 Deg.
Scrub radius 0"-1"
Anti-dive 4.5 Deg.
Ideal amount of body roll to design for at max lateral-g <2 Deg.
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