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Old January 14th, 2006, 09:40 AM   #1
Bones
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Default 4 link calculator

Stolen from POR

http://highvibesoffroad.com/drawings/4BarLinkV3.0a.zip.

Here are the directions

http://www.pirate4x4.com/forum/showp...3&postcount=21
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Old January 14th, 2006, 09:45 AM   #2
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Bad ass!! Thanks bones
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Old January 14th, 2006, 10:46 AM   #3
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Yup, I've been using this for about 6 months as I plan out the rear suspension for the Yota..
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Old January 14th, 2006, 10:53 AM   #4
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The tricky part is knowing what to set all your variables to. I.E. what you are really looking for.

Some rough things to shoot for, for the average person:

Vertical separation of the links at the axle should be about 25% of the tire diameter (So for a 36" tire, have 9" of vertical distance between uppers and lowers)

Vertical separation of the links at the frame end about 75% of the separation at the axle end.

Roll axis to be close to zero, or roll understeer, I think. I'm shooting to get close to zero. Using a double triangulated setup for the links helps for this.

Anti squat I think something less than 100%, maybe 50-70%, so that even under hill climb conditions you don't get past 100%. This helps hill climbing traction.



Well, those are some real basic numbers. Everyone has different ideas what will work. I think this summer I'm going to try doing a rear 4 link on the back of the Toyota..
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Old January 14th, 2006, 07:52 PM   #5
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Here is the problem... unless you weigh everything going into your rig your just guessing at it's weight and center of gravity... so a lot of those calculations are going to be completely off.

I'll be linking the YJ rear soon... I'm probably going to design it the moment I start cutting tube :D
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