All true and well explained - but like all things, the devils in the details and it may be that the best shock for someone may be any one of these types
These days it is hard to find a good reason to run a Hydro shock but we can definitely see reason for running twin tubes on lighter applications for sure.
But if the Twin Tube Gas Shock doesn't return, it becomes useless, it'll work once, and then you have take it out and extended? But wouldn't the weight of the car keep it pushed down always? And only the N2 gas pushing up, slightly? That's pretty dumb, if there's not enough gas to push up; it'd be better if it had a small spring to help with the pushing but still offer big vibration absorbtion, and not transmit it to the passengers. BTW it'd be good to put Sorbothane bushings/washers on different parts of the car, to absorb vibrations even more. Also Super springs polymer can be added on the springs and other parts of the car for extra cussing
The hydraulic shock will provide damping in both directions. The spring will move it around, but as oil passes from one chamber to another within the hydraulic shock, it will dampen the kinetic energy of the spring. Very good question.
@@LimaTangoZulu Thx. I have discovered that at least some Struts are what I suggested: Twin Tube Gas Shock 😲 and a massive Spring; but very dangerous to change and needs special tools
@@saultube44 yeah struts are difficult because the shock goes through the spring. You’ll need a spring compressor to get the shocks out. Another alternative is to buy a new strut assembly. That’s a new shock and spring already assembled, and will drop right in place. Or have a shop change just the shock for a pretty price. Many ways to do it, but it’s all personal preference.
a lot of twin tube shock manufacturers will tell you that even though its not expanding on its own, the shock is still functional; whether because there is PSI there that cant overcome the friction, or that the oil and gas got mixed up, or something else.
the shocks wont rebound on their own, but they do achieve rebound damping through the piston valving alone. They will still suffer a similar fate as all twin tube shocks do, a very small piston
Really nice video. I was looking for information about gas presure. I got it. tnx 7-10,5bar for usual absorber 13-17 for sport absorbers. More presure means more stiffness.
Case by case on the shock design and usage. The Bar/PSI can effect drive quality but we wouldn't increase that to support anything. Rather we would do 1. spring rate 2. valve stack 3. valve psi.
Gas charged twin tube shocks use a single main working piston in the main chamber that pushes oil through a base valve into the outer chamber that holds the gas. Monotube shocks have a working piston and an internal floating piston that divides the oil and the gas. On a external reservoir shock the concept is largely the same, but the IFP is moved to the reservoir.
I have a BMW 1200 2012 and it has a monotube shock without a working piston that separates the oil from the nitrogen, but on the label it says "This assembly contains high pressure nitrogen gas", so I wanted to know how is that possible, the oil and the nitrogen mixed in a single chamber?. Thank you for answering!
Yea if it does not have an internal floating piston or only has one piston it is an emulsion shock and the oil and gas are in a single undivided chamber.
Depends on the vehicle but for the most part you would feel like it was no longer hold the vehicle up or not as stable. In some cases, the vehicle may feel like it bounces too much, and in some case you would see leakage.
Well explained 👍👍
Glad it was helpful!
All true and well explained - but like all things, the devils in the details and it may be that the best shock for someone may be any one of these types
These days it is hard to find a good reason to run a Hydro shock but we can definitely see reason for running twin tubes on lighter applications for sure.
But if the Twin Tube Gas Shock doesn't return, it becomes useless, it'll work once, and then you have take it out and extended? But wouldn't the weight of the car keep it pushed down always? And only the N2 gas pushing up, slightly? That's pretty dumb, if there's not enough gas to push up; it'd be better if it had a small spring to help with the pushing but still offer big vibration absorbtion, and not transmit it to the passengers. BTW it'd be good to put Sorbothane bushings/washers on different parts of the car, to absorb vibrations even more. Also Super springs polymer can be added on the springs and other parts of the car for extra cussing
The hydraulic shock will provide damping in both directions. The spring will move it around, but as oil passes from one chamber to another within the hydraulic shock, it will dampen the kinetic energy of the spring.
Very good question.
@@LimaTangoZulu Thx. I have discovered that at least some Struts are what I suggested: Twin Tube Gas Shock 😲 and a massive Spring; but very dangerous to change and needs special tools
@@saultube44 yeah struts are difficult because the shock goes through the spring. You’ll need a spring compressor to get the shocks out. Another alternative is to buy a new strut assembly. That’s a new shock and spring already assembled, and will drop right in place. Or have a shop change just the shock for a pretty price. Many ways to do it, but it’s all personal preference.
@@LimaTangoZulu Yeah 👍and the budget
a lot of twin tube shock manufacturers will tell you that even though its not expanding on its own, the shock is still functional; whether because there is PSI there that cant overcome the friction, or that the oil and gas got mixed up, or something else.
So I understand the differences, but how does the hydraulic only shock have any rebound if there's no nitrogen charge?
the shocks wont rebound on their own, but they do achieve rebound damping through the piston valving alone. They will still suffer a similar fate as all twin tube shocks do, a very small piston
The spring rebounds it......
With the gas charged shocks you feel evrey single bump in the road hydraulic shocks has a much smoth ride on roughf or gravel roads
Really nice video.
I was looking for information about gas presure.
I got it. tnx
7-10,5bar for usual absorber
13-17 for sport absorbers.
More presure means more stiffness.
Case by case on the shock design and usage. The Bar/PSI can effect drive quality but we wouldn't increase that to support anything. Rather we would do 1. spring rate 2. valve stack 3. valve psi.
Are there shocks that don´t have a separator piston but do have nitrogen in the same chamber as the oil
Gas charged twin tube shocks use a single main working piston in the main chamber that pushes oil through a base valve into the outer chamber that holds the gas. Monotube shocks have a working piston and an internal floating piston that divides the oil and the gas. On a external reservoir shock the concept is largely the same, but the IFP is moved to the reservoir.
I have a BMW 1200 2012 and it has a monotube shock without a working piston that separates the oil from the nitrogen, but on the label it says "This assembly contains high pressure nitrogen gas", so I wanted to know how is that possible, the oil and the nitrogen mixed in a single chamber?. Thank you for answering!
Yea if it does not have an internal floating piston or only has one piston it is an emulsion shock and the oil and gas are in a single undivided chamber.
Thank you very much for answering
All shocks regardless of hydro or gas, smooth the spring forces mmmm
how can you tell when a gas shock is not working?
Depends on the vehicle but for the most part you would feel like it was no longer hold the vehicle up or not as stable. In some cases, the vehicle may feel like it bounces too much, and in some case you would see leakage.
Yeah but hydraulic shocks are way more comfortable for daily driving when you dont need performance
Not bilstein b4. They're actually both more comfortable and have better control than regular shocks
true, skyjacker black max or h7000 are pretty soft
No you did not....
What shock last 10 to 15 years and how much does it cost!!!!!!!!!!
Realistically, nothing. Shocks don't last forever and should be replaced or rebuilt.