Really you need the slope of the upper and lower control arm and perpendicular distance from there pivot point to there corresponding ball joint.Does anyone have the data required to calculate the exact front and rear roll centers?
I'd like to build a spreadsheet that could give the roll center at varying ride heights.
This is great.
What exactly are we measuring with the M line 1/M line 2/ and y2?
I don't really understand the position result. The position should be in the centerline and not change (assuming the car is flat and ride height are equal on both sides)
You just need the ball joint locations and the arm mounting points to the body to get the slope. For the centers height and location from the joint and add in half the tire width and you can get the radius (yellow line). There are some other methods but this will work for instantaneous centers.actually, I don't think we need to know the wheel measurements and hub measurements, we just need to calculate it based on the track.
The front track is 1457 mm / 57.4 in and the rear track is 1503 mm / 59.2 in. This may change with different wheel setups but would be easy to calculate.
Yes in that case the height is zero because those lines never intersect. So if the spreadsheet ever comes up with an error than it's zero. I'd have to put in a descent amount of logic for thatThanks! That is great.
I will try to get the measurements and positions of the control arms next week when I get the car on a hoist.
One thing though, if one control arm is completely horizontal, the M line is 0 and then it cant calulate anything. I'm not sure why, but it must be possible in some cases to have a completely horizontal control arm.