Front Stock Fox vs Fox 3.0 vs Icon 3.0 vs King 3.0: Dyno Results

[SVTRay]

What is the size of the factory Fox shocks, 2.0?

 

[Yukon Joe]

What is the size of the factory Fox shocks, 2.0?

It's listed above under the dimensional chart.

Yukon Joe
Buffalo Run Support Raptor
http://www.fordraptorforum.com/showthread.php?p=364119

 

[bstoner59]

May I suggest we "sticky" this bad boy??

 

[SVTRay]

It's listed above under the dimensional chart.

Yukon Joe
Buffalo Run Support Raptor
RPG and WSI present The South Dakota Buffalo Run - FORD RAPTOR FORUM - Ford SVT Raptor Forums - Ford Raptor

Is this the section? If so, I can't see it.

1) Hardware and Length Observations and Measurements



Details:

"Extended length" measures the overall length of the shock when extended as far as it will go. "Compressed length" measures the overall length of the shock when it has compressed as far as it will go. "Travel" is the subtraction of "Extended length" minus "Compressed length"; this tells us how far the shock can move from one end of its stroke to the other.

"Piston diameter" measures the diameter of the piston, "Shaft diameter" measures the diameter of the piston shaft, and "Hose size" is the AN size of the hose. "Port size" measures the diameter of the port between the shock body and the hose that connects to the reservoir.

"Upper" and "Lower pivot bolts" describe the size and type of hardware used to connect the shock to the truck, and "Compression Adjuster" and "Position Sensitive" are observations made about the shock's features.

Notes and comments:
1a) The King shock has the shortest compressed length; even shorter than stock. This means the King shock has the most "bump travel"; in other words, the King will travel further during its compression stroke, which means the tire is moving further up into the wheel well and may come into contact with the fender lining. On the other hand, the ICON has the longest compressed length, meaning the shock will travel almost one full inch less 'up' into the well, than will the Kings.

1b) The ICON and Fox 3.0 shocks effectively allow for the same (most) 'down' travel, which will result in the tire staying in contact with the ground longer than the other options.

1c) Unlike the other three options, the Kings are not position sensitive shocks, just velocity sensitive. This essentially means internally to the shock, the damping force is the same for a given velocity regardless of where the shock is in its stroke. The King has a user-settable external compression adjuster to restrict fluid flow into the reservoir. The ICONs are position sensitive and have an external compression adjuster.

2) Spring Rate and Ride Frequency Measurements

"Spring Rate" measures the amount of weight needed to compress a spring a certain distance. In this case, the following data is in terms of "how many pounds does it take to compress the spring one inch?" and is denoted as lb/in.

The Stock Fox springs compress at a rate of 525-550lb/in.
The Fox 3.0 springs compress at a rate of 550lb/in.
The ICON 3.0 springs compress at a rate of 700lb/in. 27% stiffer than stock
The King 3.0 springs compress at a rate of 600lb/in. 10% stiffer than stock

"Ride Frequency" is a calculated value used to help compare various aspects of suspension systems across vehicles. It's found by crunching spring rate, motion ratio, and corner weight through a mathematical black box (the details of which are beyond the scope of this discussion). The numbers of several vehicle types, as well as these shocks are offered here to help provide some perspective.

 

[keatonskidmore]

What is the size of the factory Fox shocks, 2.0?

2.5

---------- Post added at 01:36 PM ---------- Previous post was at 01:35 PM ----------

BigJ that is a heck of a test and a perfect write up. I enjoyed reading and learning from that!

 

[SVTRay]

2.5

---------- Post added at 01:36 PM ---------- Previous post was at 01:35 PM ----------

BigJ that is a heck of a test and a perfect write up. I enjoyed reading and learning from that!

Thx

 

[bstoner59]

Ya that's right...

 

[BIRDMAN]

You said the X axis represents inches of travel, so it appears the King and Icon go from -3"(?) to +3" when the FOX goes from -3.75"(or so) to +3".
Do you happen to know why the travel strokes weren't the same on all 3 or does it not matter?

 

[BigScott]

Hey Big J, I would have guessed you gave up on this topic after the last **** fest?
Good job for being such a paient guy.

I have a small fact to pass along to the very few 5.4 owners. 5.4 stock fox shocks have a different spring rate than a 6.2 due to about 100 lbs or so less weight on the 5.4


There are 4 different shocks compared, there are as many or more types of Raptor owners.
1. Streetqueen, very happy with stock or may upgrade for looks or the rare occasional offroading.
2. Daily drives Raptor then weekend offroading at a moderate pace.
3. Dedicated as an offroad truck, not worried about street "soft zone"

Choosing what the usage of your Raptor makes a difference. Also which Raptor modification company you believe makes a difference.

 

[BIRDMAN]

Hey Big J, I would have guessed you gave up on this topic after the last **** fest?
Good job for being such a paient guy.

I have a small fact to pass along to the very few 5.4 owners. 5.4 stock fox shocks have a different spring rate than a 6.2 due to about 100 lbs or so less weight on the 5.4

Hey welcome back SCOTT