T
I think you know what I’m saying. I would cut in front of the arch, add a 5” section. And move the arch back 5”, then cut 5” off the back of the frame. That puts the arch back further in relation to the tub and would put the frame arch right in front of that filler tube. With a stock tank there is definitely not enough room for the tube to exist with a frame right in front of it.
Do you plan to move the front?
So using the 4-link calculator, it said my old short arm setup had 165% anti-squat and a 19* roll axis. This setup raised the frame mounts a little, but the axle mounts more to get to 73% anti-squat and 3* roll axis. I can move the frame side upper down one hole and that changes the anti-squat to 90% and keeps the roll axis at 3*, but moves the instant center from 102" to 74". I'm not smart enough to know what's most important. I'm going to run it where it is and see how it performs knowing I can make adjustments if needed.
I only know enough to be dangerous, but all things being equal I’d rather have the higher anti-squat. That said, the link calculator is not spot on accurate, because most of us don’t know our actual center of gravity and take a guess - which I believe impacts most if not all of the calculations.
I do think that relative changes based on link locations and lengths are accurate. So, raising your frame side upper should increase your anti-squat - you just don’t really know if you are going from 73 to 90, or from 90 to 115. I agree with your plan - make the change and see how it works. I’ve always looked at the calculator as a guide, but it has worked well for me doing it that way.
Hopefully someone will chime in - happy to be corrected.
I’m really enjoying your build.
I only know enough to be dangerous, but all things being equal I’d rather have the higher anti-squat. That said, the link calculator is not spot on accurate, because most of us don’t know our actual center of gravity and take a guess - which I believe impacts most if not all of the calculations.
I do think that relative changes based on link locations and lengths are accurate. So, raising your frame side upper should increase your anti-squat - you just don’t really know if you are going from 73 to 90, or from 90 to 115. I agree with your plan - make the change and see how it works. I’ve always looked at the calculator as a guide, but it has worked well for me doing it that way.
Hopefully someone will chime in - happy to be corrected.
I’m really enjoying your build.
Agree with all of that, except raising the frame side upper decreases anti squat.
You are absolutely right. Mispoke there. Thanks Stark. I'll correct it just for clarity.
Agree with all of that, except raising the frame side upper decreases anti squat.
Looks great. A lot different than the time I saw it haha
I thought I’d be doing this over the winter, but I have serious issues so here we are. I went ahead and did a mid-arm to the front of my TJ. Since my rear stretch was put together with various parts, I did the same here. TMR brackets, Johnny Joints, aluminum links from Busted Knuckle and a Savvy front truss. I followed the Savvy mid-arm to a tee, including vertical separation for the frame upper mount. Here are the results:
View attachment 363041
View attachment 363042
View attachment 363043
View attachment 363044
View attachment 363045
I’ve only taken for a spin on the road and so far so good. Drives straight and “feels” smoother and more balanced. Can’t wait to get out on the trails.
Looks great! Sure sure, Mid arms don't do anything for ride quality... But there is a difference on the way the Jeep drives. The way it corners, goes through intersections, enters drive ways etc. No one ever talks about that.