BioMax's 4-link Article

I just read all this, from page 1 to 5, and I must say, guys like you keep our sport safe. Now everyone that goes to do a 4 link install having read this will be that much more cautious! Good info, do you recommend any literature?

Tune to win and Engineer to win by Carroll Smith. And Suspension (maybe Chassis) Engineering by Herb Adams.

Chassis Engineering by Herb Adams seems to be a really good book. I picked it up a few weeks ago and have started reading through it.

besides making a new thread I figured I would ask here and get the best answer

would I need to run a panhard bar with these links and the set-up
getting super pivot ends
http://www.suicidedoors.com/SuperLliftWishboneKit.php#

No the panhard bar does keep it from moving from one side or the other. Your upper bars are triangulated meaning... that is what is going to keep yours from moving from one side or the other. a panhard is usually used with a 2 link set-up or a parallel 4 link.

ok thats what I thought, was going to make 100% sure. so when I'm measuring for the links before I ordered, and see if I had to measure for the panhard too in the process.

thanks for the help.

Max, from a performance stand point wouldn't it be advantagous to use the vehicles "balence point" if you will, to setup your instant center and try to achieve the most anti-squat possible. Also I would like to note that you are saying to tilt the rearend down so that you are slightly preloading it for acceleration.

The balance point you speak of is called the center of gravity. That point is what the instant center is measured to (awesome huh? an imaginary line drawn between two theoretical points.) The amount above or below the cg of point A, is the percentage of anti-squat. In the drawing, there is about 60% anti squat. What that means is that the suspension will negate %60 of the induced squat that the accelerating vehicle is creating.

To say that the ic should meet at the cg for best performance is a specific statement to a very broad question. So in a word... No. 100% anti-squat is not a desirable trait for anything except drag racing, maybe. Although anti-squat is desirable, too much can be a nuisance as well as cause several other undesirable effects. The total amount used is quite dependent on the exact use of the vehicle.

For a

Edited: 2/24/2007 9:13:48 AM by laynframe90

I was pointing out that without the COG you have no idea where you should place the instant center. If you need more or less anti squat you wouldn't know where to adjust the IC to in a preformance application. Also you could have the IC in the middle of the vehicle and still be under the COG to achieve your 50% of anti squat. You could run into space constraints and have to make the bars shorter which could induce brake hop. The same with the pinion angle, I was just stating that if you "preload it" or "point it down" when you accelerate the axle trys to tilt or twist upward and into your desired angle. If you re-read my post it might make more sence now, I was making statments.

By the way I am not mad or trying to argue, just trying to have an inteligent conversation. (this is my disclaimer)

Chris- I took absolutely no offense to your "statements." But in my defense, your first statement was phrased a whole lot like a question...

Yes you are right about needing to know exactly where your cg is in order to calculate the amount of ant-squat you have. Unfortunately finding your cg is like going over to your toolbox and grabbing the "easy button" (it just doesn