Airing down for sure. Lt won't change much for fast dessert run but for crawling...
6112 are progressives and 5100 digressives shocks why ?
Here's some literature 1engineer posted about valving:
Quote:
Originally Posted by NorthWest 4R View Post
Thanks for posting how a shock and spring work, but being an Engineer I cant see how you left out a very important part in the two different types.
Digressive valving : In a digressive piston design, the shocks dampening capabilities are felt more rapidly because the piston is concaved and the shims are slightly bent (preloaded) into the dish shape of the piston. The benefit to this over using just heavier grade shims is that the dampening response is felt much quicker but the max yield doesn't really change.
As shaft speed increases, the valving gets softer. A digressive designed shock has a considerable amount of low-speed control and builds resistance as the shaft speed increases to a predetermined point where the rate digresses and stays the same as the speed increases. This type of design has good low-speed control and does not build ultra-high resistance with the high speeds associated with bumps and holes.
Digressive shocks :
CRAPCON aka ICON
Bilstein 4600/ 5100 /5125 / 5150 / 5160 / 5165
Rancho
Monroe
Skyjacker
Rough Country
You get the idea...
Progressive valve stack / Linear As the (shock) shaft speed increases, the valving gets stiffer. A linear shock has a piston that is designed to start out with low resistance and continue to build as the speed of the shaft movement increases in a linear fashion. This type of shock has very little low-speed control, but very much high-speed control.
Self adjusting deflective valving is pretty much standard issue in any decently made after market shock (sway-away, fox, etc.) It's essentially like the digressive shock described above (uses a piston with multiple shims stacked in a pyramid on both sides for dampening) only the piston is NOT digressive (concaved). This is known as progressive/linear valving.
Progressive Shocks :
KING
FOX
RADFLO
Camburg
Sway-Away
Walker evans
Bilstein 6100 / 7100 / 9100 / 9300
All the big boy shocks...
Digressive valving works great for sports cars, minivans, street trucks, ect, where you're looking for on road feel and a smooth ride. Digressive valving will have a firmer feel to it and this is what most people relate to them feeling a harsher ride than over a Linear shock. This type of shock is CHEAPER to build, easier to R&D, less maintenance required, more of a 1 size fits all attitude.
Then look at any trophy truck, class 1 car or any shocks built by the big boys that have thousands of hours in testing and racing and you will see why they run a linear/progressive valving/piston setup.
This is primarily why I HATE ICON so much, it is nothing more glorified than any of the other cheap digressive shocks, just at an over inflated price to make it look like it is in the same category as the well known big boys. Go to any desert race and try to find even one team with this brand, you wont and there's a reason why.
(P.S. Doesn't that TRD PRO model sound SWEEEET, yeah LOL. It will be the same models of bilsteins as the Tacoma Baja TX 5100,s out front and 5165's out back, ow yea plus the cool TRD stickers on them LOL.
There are several reasons I did not explain or post links for shock valving design. The main one being is this is meant to be a simple guide to the general operation of suspension components and not a detailed one.
Also application and economics dictate shock type, not valving design. It would be pretty silly to install 9100's on a vehicle that I drove on the interstate every day except for a few times I go slow on trails and over rocks each month. Conversely it would be silly to think I can hit a ramp and jump 80 feet with my stock TE. Well, I could, but the results wouldn't be pretty.
If there is enough interest I would be happy to include the valving design later. I will even do it in a non biased way.
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