2021 Ford F150 -> XTF pre runner build log

[kabacj]

In order to build a more capable truck than anything you get from a major manufacturer, it’s necessary to start over with a new frame. The frame needs to prioritize articulation as well as have the ability to take advantage of a race quality off road suspension.

One feature that takes the truck to the next level is a second shock called a bypass shock. Here is an example




Using a shock like this you can tune each portion of the travel of the shock.

Each section of the travel has its own damping adjustment that is completely unrelated to the travel before or after.

Many traditional mono tube shocks are limited by a common set of valves that limit how drastically you can adjust travel throughout the stroke. Especially without physically opening the damper and changing valve packs. Using both a standard mono tube shock and a bypass shock at the same time it’s possible to blend the best of both worlds. The mono tube provides a fixed damping curve and the bypass shock provides a stepped curve where it’s possible to tune each section of the stroke. The bypass shocks allows adjustment of each portion of the stroke with adjustment knobs outside the shock. Changes can be made quickly on the fly for each step of the travel.


Of course if you go this route ( as I will) it’s necessary to re tune the shock sent with the basic kit. Since the bypass shock will do part of the damping work, it’s necessary to remove some damping from the stock factory five tuned Fox Shock. Luckily the Fox 2.5 dual compression adjustable shock is fully rebuildable and tune able using basic hand tools and a compressed nitrogen cylinder to recharge the shock.

I plan to both test the performance of the standard kit built on the Gen 14 F150 as well as build and test the next level performance afforded by a bypass shock.

Finally the frame will accept air bump stops as well.



Air bump stops are yet another shock to help you control that last bit of travel before the shock hits bottom.

The great thing is no matter where you want this truck to be from a performance standpoint the frame is already built to accept the upgrade.

I can’t wait to start testing!