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View Full Version : Give me some suspension design pointers


slngsht
03-26-2007, 09:15 PM
I'm about to do a change of front uprights and A-arms in the next couple of weeks.



Obviously since I have the car and the uprights, my hands will be tied as to what I can work with.



But before I start, I'm going to analyze it, and make sure what I'm about to attempt isn't going to screw things up.



My questions are:

1- How much movement of the roll center is "normal", both horizontally and vertically? From what I had read in the past, ideally the roll center needs to be above ground, and below the rear roll center? I could be totally wrong on that.

2- How much camber change is reasonable (i.e. at what point would it be considered a reasonably good setup) - as a function of roll or dive.



I'm already aware of making sure the motion ratio for the spring should stay linear, so I'll be working on that.



Any pointers welcome.

sb427f-car
03-27-2007, 10:06 AM
I know front roll center should be about 3/4s of the rear roll center? So your statement/question about it being below the rear's is correct. Ideally, from what I have read/understood from Staniforth's book (<u>competition car suspension: a practical guide, 4th ed.</u>, good reference and a must read before building), is that as low to the ground for roll center as possible?