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I recently purchased a 7.3 Excursion. I have a set of F code springs sitting in my shop from doing the SD RSK spring swap to my OBS (C code rears/V codes fronts).
My plans for the Ex is just a daily driver. No plans of towing with it either.
I do NOT want to lift the Ex. What is needed to be done with the F codes so I can put them to use.
Looking for a rear sway bar, '08 mirrors and a grille.
So you don’t want to have any lift over stock and you have no towing plans, why are you wanting to swap to the F code springs then? Typically in the past those two items were the driving force behind the various pickup truck rear spring swaps.
springs determine payload capacity, set ride height and locate the axle.
your shocks determine how fast the spring can move, this is the key component to ride quality.
tire compliance, a function of sidewall stiffness and psi is another key factor.
True.. springs support the weight of the vehicle and shocks control the action (stored energy) of the springs.
But, a rear SD truck spring is two stage. First stage is light then it hit the second stage then it becomes stiff. No matter what shock you install, if the leaf is too stiff it'll never do its job. Truck will right like a pogo stick. A pickup in the rear is lighter than the Ex that's why a two stage works better.
Just was wondering if I can remove the lower thick leaf (2nd stage) and just use the first stage.
Billy T. gnxtc2@aol.com
In a prior setup, I installed brand-new ($$$) Ford F-code springs on my 05'. I wouldn't recommend it based on your "no lift" interest.
Here's what you get:
Approximately 1.25" of lift (I measured 25.5" after)
The rear of the Ex is heavy enough to make the spring pack sit on the overload spring (you'll need to add a leaf in order to avoid this, so account for more height)
Without the added leaf mentioned above and due to the overload contact, the ride quality was similar if not worse to the factory G-code spring.
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