Dumb Question Thread - No Flaming Allowed

[Flow]

If it's an oiled filled strut it's normal.
The strut is just there to damp the spring.

[Slideways]

Yeah, thats unfortunate as they are new, but shit happens, hopefully they have some working units in stock.

I really thought they were bad after test fitting a camber plate and just the weight of that almost fully compressed the struts.

Edit: After an email with TCK they say this is normal as the front struts are not filled with gas and therefore will not rebound, as long as there is resistance when pulling the strut back up, all is well.

I believe them, but a strut that doesnt rebound..? Whats the point, its all spring then.

Factory damper with 120k, new KW, and new Ohlins all went back to their full length after compressing them. Rear factory dampers with 120k did not and were put in the bin.

Tested a set of used TCK SAs that a friend was looking to buy and the rears would not rebound. Fronts had springs installed and could not be tested.

Edit: Non-gas filled struts can do this apparently, so I guess TCKs don't have a gas charge.

[maupineda]

Factory damper with 120k, new KW, and new Ohlins all went back to their full length after compressing them. Rear factory dampers with 120k did not and were put in the bin.

Tested a set of used TCK SAs that a friend was looking to buy and the rears would not rebound. Fronts had springs installed and could not be tested.

Edit: Non-gas filled struts can do this apparently, so I guess TCKs don't have a gas charge.

That is not encouraging either, how are the preventing foaming under high speed damping? That is the main reason of gas filling.

[Slideways]

That is not encouraging either, how are the preventing foaming under high speed damping? That is the main reason of gas filling.

Yes, that was my question as well. I recently watched a few videos showing the difference between monotube and twin tube dampers:

In the video above, it appears that the piston/shaft in the twin tube is rebounding back to its initial position.

[IamFODI]

That is not encouraging either, how are the preventing foaming under high speed damping? That is the main reason of gas filling.

Seems like valve design can reduce foaming, and I know oil formulation can. But yeah, nothing prevents it like gas pressure.

I've seen the odd brand new damper without enough gas pressure to cause the piston to return. E.g., rear Konis for... I think a MkIV Jetta back in the day? AFAIK it's not that they prevent foaming some other way; it's that someone thought foaming wasn't worth worrying about in that application.