VB air ride failure - what replacement?

Just for balance. We have VB 4C air on our t6 LWB 4mot & love it. It’s now getting on for 8 yrs old & has been faultless. I would have no hesitation on having it fitted to our next van. As already said, it isn’t a “Show Pony” system, it’s a workhorse & does what it says on the tin.
I suspect hat the majority of VB Air gives satisfactory service. If someone kicks off about something it is usually noticed people do not constantly write in to say they are great very often so the reader can gain an unbalanced view. Its human nature to moan more than give credit and if someone has a grudge well...
 
You may not remember , But when KW first came on to the market (80 s ) all the dampers in their kits were purchased from KONI . the conflict in the market between the two brands prompted KONI to with draw from this arrangement some years later , but i suspect KW had already learnt a lot from this relationship and it is the reason we rate KW better than older tech from B ___ .
I have not seen a KW product suitable for my needs though I have not looked recently.
 
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You may not remember , But when KW first came on to the market (80 s ) all the dampers in their kits were purchased from KONI . the conflict in the market between the two brands prompted KONI to with draw from this arrangement some years later , but i suspect KW had already learnt a lot from this relationship and it is the reason we rate KW better than older tech from B ___ .
A, Ha I have had a very brief look at the KW Website and can see an Hydraulic lift that can even be used on the go! That seem most interesting, most interesting indeed. Thank you very much for that @CRS Performance. I shall have a good peruse later but that could men staying with conventual springs damper and having ones cake and eating it. If I was a Dog I would be wagging my tail or if I was a NO Tail I would wet myself. Must get a grip, probably useless for T6 Knowing my luck. Got to go being called.....
 
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Hi there, I am from GER and new to the t6forum. The VB 4c +30 front struts of my T6.1 (California) are worn out the second time within 2.5 years. Damping almost disappeared, struts making weird noises, ride feels like sitting on a bouncy ball (expensive one). Rear axel shocks are still in perfect shap as I initially went for Koni dampers. No wear at all at the rear axle. Now I am reasoning to swap the VB struts with Streetec ones. The foresaid struts are using Bilstein dampers).
Despite the fact that I am doomed when doing so, the whole story should be a straight forward mission. Mechanical parameters of the new struts are identical, max. pressure also fits. When doing a calibration session after the new parts have been installed everything should be fine.
Has anybody already tried to do something similar? I'd like to avoid trashing the complete VB system just due to their crappy front axle dampers.
Thanks in advance & BR
 
I’m certainly not an auto suspension expert but I have worked on quite a few shock and vibration damping systems and they were all oil based hydraulic because air is a really poor medium for damping.
 
The struts in this case are a fixed combination consisting of damper/shock absorber + air spring. The damper units of the VB struts are still closed and of course VB magic. Lets assume they contain oil as usual ;-)
 
The struts in this case are a fixed combination consisting of damper/shock absorber + air spring. The damper units of the VB struts are still closed and of course VB magic. Lets assume they contain oil as usual ;-)
Every shock absorber has Oil in it , some are designed to be Gas assisted . Many Gas shocks use Gas to stop Bubbles forming in the oil normally due to poor design valving and the excessive pressure in the shock causing the aeration which results in shock fade .

Most of the dampers we sell dont have Gas at all, they control the oil flow better through extra control valves which stop the hi pressure forming , there fore NO Aeration !! no fade . KONI technology rules ha ha
 
Every shock absorber has Oil in it , some are designed to be Gas assisted . Many Gas shocks use Gas to stop Bubbles forming in the oil normally due to poor design valving and the excessive pressure in the shock causing the aeration which results in shock fade .

Most of the dampers we sell dont have Gas at all, they control the oil flow better through extra control valves which stop the hi pressure forming , there fore NO Aeration !! no fade . KONI technology rules ha ha
Thanks for the clarification. Does that mean I can swap the struts?
 
Thanks for the clarification. Does that mean I can swap the struts?
We swap out a lot of Air systems back to conventional stuff no problem at all , In our experience Air as an after market mod isnt that reliable and difficult to repair for a lot of mechanic repair centres , VB air do seem to have a really poor after sales attitude.

The rear chassis does need some welding to replace the Bump stop tube which gets removed to put the air bags in
 
We swap out a lot of Air systems back to conventional stuff no problem at all , In our experience Air as an after market mod isnt that reliable and difficult to repair for a lot of mechanic repair centres , VB air do seem to have a really poor after sales attitude.

The rear chassis does need some welding to replace the Bump stop tube which gets removed to put the air bags in
Thanks for your reply. As per my initial message I am not planning to get rid of the air suspension. I just want to exchange the front struts to others also with air spring but better shocks. As you are an expert: After 9000km both front shocks have D < 0.12. Any comment on that?
VB shocks seem to lack the required endurance for the weight on the front axle.
If you are ripping out quite a lot of VB systems: I am looking for a used ASCU for a VB 4C for Tx as spare part.
 
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