Liquid Shocks vs. Gas Shocks?
#1
#2
Virtually all modern automotive "shock absorbers" use liquid (oil) to hydraulically damp suspension motion. Modern shocks may also have a pressurized gas charge to help keep the damping more consistent as the shock heats up.
For many years, ALL Rangers have been factory equipped with oil damped and gas charged shocks, front and rear.
Most gas shocks are the emulsion type which means that the oil and gas are allowed to mix. More expensive shocks (including most off road racing shocks) may have a bladder or piston to keep the gas and oil separate.
For the best combination of performance vs. cost, you should consider quality gas/oil emulsion shocks for both front and rear.
For many years, ALL Rangers have been factory equipped with oil damped and gas charged shocks, front and rear.
Most gas shocks are the emulsion type which means that the oil and gas are allowed to mix. More expensive shocks (including most off road racing shocks) may have a bladder or piston to keep the gas and oil separate.
For the best combination of performance vs. cost, you should consider quality gas/oil emulsion shocks for both front and rear.
#3
One question further would be, what would quality shocks be that'd mount all the way around? I realize you get what you pay for. I plan to do a 3SL and a 3BL. Obviously only doing 3inches would sit me at the STOCK 4x4 height, which is where the BL comes in. Thanks! Any recommendations or advice as to do/not do to my truck?
#5
Originally Posted by rwenzing
Most gas shocks are the emulsion type which means that the oil and gas are allowed to mix. More expensive shocks (including most off road racing shocks) may have a bladder or piston to keep the gas and oil separate.
Emulsion to me means a dispersion of two normally incompatible materials, usually liquids. Having gas mixed with oil would be a bad thing.
I know gas pressure is used in shocks to help prevent the oil from aerating while being force through the orifices at high temperature. Some shocks have a barrier between the oil and gas while others have gas in contact with the oil. Maybe the term emulsion is used (incorrectly) for shocks which have contact between the oil and gas.
#6
#7
Originally Posted by IN2 FX4
I know gas pressure is used in shocks to help prevent the oil from aerating while being force through the orifices at high temperature. Some shocks have a barrier between the oil and gas while others have gas in contact with the oil. Maybe the term emulsion is used (incorrectly) for shocks which have contact between the oil and gas.
When subjected to extreme conditions, a shock with a piston or bladder to separate the gas and oil is almost always a more consistent performer than a comparable emulsion shock. It is also much more expensive. You won't see emulsion shocks on Baja trophy trucks but they work well enough for normal street and casual trail use.
#8
I decided to do a little research on the various types of shocks. Apparently standard fluid shocks are referred to as emulsion shocks. Standard shocks not only have oil but also air or gas in them. During heavy use the gas can emulsify with the oil which reduces the dampening properties of the shocks. Hence the name emulsion shock. They are not designed to emulsify, it is just an inherent problem with the design.
As you stated already the shocks with a barrier between the oil and pressurised gas will nearly if not completely eliminate the emulsion problem.
Bob, thanks for making me look deeper to understand how shocks are designed and function.
As you stated already the shocks with a barrier between the oil and pressurised gas will nearly if not completely eliminate the emulsion problem.
Bob, thanks for making me look deeper to understand how shocks are designed and function.
#9
Pressurized gas shocks reduce foaming of the oil actually. The higher the pressure, the better the effect. You can have twin tube shocks where the gas is at the top of the outer tube, and single or twin shocks where the gas is in a bladder, or even in a closed cell foam structure.
The bladder and foam types have one particularly significant advantage beyond preventing mixing -- they can be run in any position. Shocks with gas "pockets" that are not contained in some way must be mounted in a certain position -- though that can also be a requirement with certain self-adjusting shocks as well.
The bladder and foam types have one particularly significant advantage beyond preventing mixing -- they can be run in any position. Shocks with gas "pockets" that are not contained in some way must be mounted in a certain position -- though that can also be a requirement with certain self-adjusting shocks as well.
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