Roll Centers on G-Body

[racingford]

im with sockcardriver, if ya believe that roll centers can exsist below the ground than you are truely MISSING somthing

[Extreme Race Cars]

Your roll center could be below ground but I doubt it would handle much better than a Mack truck...

[dirt2]

Roll centers on g_body

im with sockcardriver, if ya believe that roll centers can exsist below the ground than you are truely MISSING somthing

I understood the question to be about a stock chassis. So in stock form the lower balljoint
will be a little heigher than the bolt center where the arm mounts to the chassis An the upper
balljoint will be a good bit lower than the inner cgassis mount.With these angles the lines drawn
through them will intersect outside of the chassis & then will go back through the tire center line
to the center of the chassis. Where the lines cross the center line of the chassis will be below the ground.This will give you a roll center below the ground. Now lower the chassis so the lower arm will be level from the balljoint pivet point to the center of the bolt then do what you need to level out the top arm from balljoint center to the inner mount center. With both arms level the lines through the pivet points will not intersect & this is refered to as ground level roll center.
Lower the chassis so you have like two deg. from the balljoint center to the bolt center at the chassis
lower the upper arm inner mount so you will have lets say twelve down angle to the chassis.With
this the lines will pass through the pivet points toward the center of the chassis & out to the other side intersecting there & back through the tire center past the center line of the chassis. Where the lines cross at the chassis center will be the roll center.Just measure from the floor up to the cross point to see how high the roll center is abgve the ground. In stock form with a very low roll center & a high center of gravity the car wants to roll a lot & will need stiff springs to control this.
With a heigher roll center & lower center of gravity the car will use softer springs.

dirt2
Ground Effects Suspension Control

[dirt2]

Correcting the stock form on chassis.
In stock form the lower balljoint center pivet will be a little lower than the inner
bolt where the arm mounts to the chassis. Just jumped the keys a bit, sorry about that.
dirt2

[petermanbuilt]

Well Said Dirt2, I agree 100%

[chevy370lsx]

Dumb question. Were is the ideal place for your roll center to be. What affects does it have moving it up and down, side to side?

[stock car driver]

Im gonna try and get mine 12 below ground, I want all the body roll I can get!

[Extreme Race Cars]

Im gonna try and get mine 12 below ground, I want all the body roll I can get!

LMAO... I hear 12" below ground will cause ya to roll over... I'd start with 6"

[really?]

rcenter

i will chime in just to say that sounds like stkcar5 is on track with whats going on now days with frnt ends i will also agree that the jacking affect is very important as is dynamic measurements but you must have static in the garage before you get dynamic measurments and without a good 3dimensional software stockcardriver jeff your lines on the floor and paper we quit that 20 years ago ,rollcenters below ground level is very easy to obtain. and also 4 whls are faster then 3 thats also something we figured out 20 yrs ago and thats when you need to take alook at the rear rollcntr not the frnt. sounds like your on the right track stockcar5