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maybe the M220 axle tubes should have been plug welded on the rubicon instead of by robots in a manufacturing facility. 🤣

I was just mocking the one video and I am an expert philosophy. No doubt there are lots of good resources available. Like anything else, just need to weed out the BS and put your time in. I do admire how stuck in you get with all of this. I just don’t have the patience right now. Maybe someday.

Hmm, welding from YouTube…. Kinda diminishes the art. I guess nowadays we are all just one video away from any accomplishment we want. 🤣

I am jealous. Wish I knew how to weld. Sssoooo, when should I be there for the first lesson. 😳

Kinda high. did you also get spring free length? I haven’t put mine on yet. Probably 1” or less preload to get them to sit near mid travel in the front on stock 4 door. How is yours sitting? How much preload do you have?

for those interested. Here is the exact motion ratio for the SAS bilsteins. Notice it is non-linear and drops of quickly during jounce. Biggest bang for your buck at full extension, nearly 1.7. A shock with different lengths than SAS will have a slightly different motion ratio. Most of the...

Fox has same extended length as many of the other coilovers (24.3”) just like 4WP example shown. So the droop angles will be identical, just the jounce limits will be different since they have different max travel numbers.

indeed. Some poor assumptions that have already been highlighted in some of the earlier posts. However the stock front springs are definitely lighter than 506 lbs/in. Especially the non-SAS flavors.

Utility of 3D kinematic model Model was developed in order to quickly evaluate different shock lengths and control arm geometries. Different shocks As an example, shown are two different shock configurations: SAS bils (23.31” ext and 17.06” comp) and 4WP (17.69” ext and 24.32” comp)...

MODEL DESCRIPTION For those interested, here is a brief description of the model. Parametric equations for the circular motion of both ball joints within their respective planes of motion were developed. The full 3D motion of each ball joint was then determined in the global coordinate system...

FULL 3D KINEMATIC MODEL OF FRONT SUSPENSION I have finally included the upper control arm (UCA) into the model. So it now represents the full kinematic motions of both the upper and lower ball joints on the knuckle. The model is also now fully 3D and includes “out-of-plane” motions. NOTE: this...

Waiting around to connect to the servers could add up to a bunch of beers.

this can’t be overstated. the oem IFS wheel travel has a pretty tight design envelope, strictly based on kinematics, ie, hard points and knuckle/ control arm geometry. So not much room to play with shock lengths, unless upper shock tower is altered; ie, design envelope is from roughly 24.3” to...

WHY… CRAZY… CG as low as physically possible on portals would be my plan…

compatibility is not the issue, Procal is.

@H0pelessOpus Your equation is not what is posted. You have a typo. for your case. +55 offset with 33.8” tire. Rscrub= (147 - 55) - 0.233 * (33.8/2) * 25.4 - (33.8/2) * 25.4 * sin (1) = -15 mm see red curve from figure (scrub radius) and for a 33.8” tire it also shows a -15 mm scrub radius...

the badlands oem non SAS rim is +55 offset. Here are the results for that wheel offset. All units are mm and degrees for the equations. The plot is shown for tire diameter in inches to make it easy. If you do the calculation for your tire of interest you will be on these curves somewhere, as...

Good info here. See post #5. By @jeff in ohio https://www.bronco6g.com/forum/threads/front-unit-bearings-safe-to-run-without-a-cv.85001/

Indeed. Stronger tubes is a big deal. Here is a plot I made for tube strength normalized to the OEM M220. Some hypothetical tube diameters as a function of wall thicknesses. Increasing tube diameter is a bigger benefit than wall thickness but both help. The D60 is almost 3 times as strong as...

@5GENIDN some things can only be appreciated by us old timers. There once was an engineering design world before CAD. 😳