The Ultimate "Travel" Guide - Bronco Suspension Data Compilation

[RobBob22]

Reposting here as well. Found these in the ford parts catalog. Possible Interesting suspension update coming for a version of the bronco. Live dampening Fox suspension.

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[Lak34ers]

Reposting here as well. Found these in the ford parts catalog. Possible Interesting suspension update coming for a version of the bronco. Live dampening Fox suspension.

I hope so. Looks like a raptor 4.0.

 

[RobBob22]

A few additional updates.

We continue to build on the spreadsheet. We captured some additional information reported by @Milner here.

There are some new tabs added by @Gene Dios with some trailing arm information.

I suspect we will continue to add additional categories and information moving forward.

 

[iamcris]

Different angles, same spot. Didn't move Bronco. I found a ramp in nature. Icon.

 

[GreyZ]

Different angles, same spot. Didn't move Bronco. I found a ramp in nature. Icon.

Do you have a front sway bar here?

Always interesting seeing super flexy rear axles while the front is not close to max compression.

 

[iamcris]

Front yes, disconnected, no.
Rear also yes, factory.
Here's another picture of me having fun but in a more compressed scenario. Rear tire is touching....close but touching.

 

[GreyZ]

Can someone add the 4wp spring rates who has edit access. They are 650 lb/in front and 250 lb/in rear per the manufacturer.

 

[87-Z28]

Can someone add the 4wp spring rates who has edit access. They are 650 lb/in front and 250 lb/in rear per the manufacturer.

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?

 

[AccuTune Offroad]

650LB front spring rate is very very stiff. We use that rate for our "heavy weight" front coilover option that is designed to fit Broncos with an additional 400-850LB of added weight.

However, we also change the valving on the the main piston and adjusters to match the spring rate.

 

[GreyZ]

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?

Yes. 16 front 18 rear.
I agree the front rate was higher than expected. The rear is right about what I figured. I am not totally sure my measured preload in the front. My rear is ¼” (just enough to keep the spring from allowing movement.).
My fender heights on stock 33” with 36psi is 39 ¾” rear and 38 ⅞” front.

I could drop the front some, but I was happy with this rake once I got it all adjusted. The rear needs some thin tender springs to drop any more. I have not found a tender springs that would work well yet. May have to switch to a 16” main spring with a tender in the rear if I want to drop the ride height any. Still debating that path currently. It does look like a 16x3-250 would be possible without spring bind with a tender in the rear. Just not sure I want to drop 300$ to lower it 1”.

For comparison, my stock badlands non-sas fender heights were 37 ⅛” front and 38 ⅞” rear.

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