Front Bilstein dampers fitted upside down...

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Nick Bassett
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Front Bilstein dampers fitted upside down...

My yr 2000 Superlight R has the front Bilstein front damper units fitted upside down and AFAIK has had since the car was built 22 years ago.

Yesterday a fellow Caterham owning friend was looking at them and suggested they had been fitted incorrectly and should be the right way up. He said only race dampers can be fitted upside down.

Car handles fine and presumably the previous 5 owners were happy with handling too. Car was built by a Caterham employee (Not Caterham) for the first owner.

Just keen to know what the truth is?

Thanks

SLR 11
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My 1998 SLR also has them upside down... I asked the same question on Blatchat some time ago and most respondents said it was fine...https://www.caterhamlotus7.club/forum/techtalk/bilsteins-upside-down-0

SLR 11
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My 1998 SLR also has them upside down... I asked the same question on Blatchat some time ago and most respondents said it was fine...https://www.caterhamlotus7.club/forum/techtalk/bilsteins-upside-down-0

aerobod
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I've always run them on my R400D upside down without problem, to enable easier adjustment, reduce accumulation of grit where the piston meets the seal and reduce the unsprung weight very slightly (with the body side being a bit heavier than the piston side).

James

7 wonders of th...
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Mono tubes normally have a floating piston which has a nitrogen charge to reduce aeration these are fine to be inverted in order to reduce unsprung mass, stock dampers are twin tube design which are not pressurised and so should be fitted in the conventional manner.

 

Nick Bassett
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Thanks for replies.

So, it would seem we have a split decision!

I'm assuming my adjustable standard Bilsteins are twin tube and therefore (according to 7 wonders) should be fitted the correct way up?

Bolter, bolter, full power...

Superlight R # 81

Instagram: superlight_r_81

Richard Price
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I'm assuming my adjustable standard Bilsteins are twin tube and therefore (according to 7 wonders) should be fitted the correct way up?

No. Bilsteins are monotube. 

Nick Bassett
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Thanks Richard, but in another thread '7 wonders' mentions that standard Bilsteins are twin tube and therefore need to be fitted the correct way up. My adjustable Bilsteins are not of the race type, therefore I assumed them to be of twin tube construction? Or is that incorrect?

The other thread I mention can be read here:

https://www.caterhamlotus7.club/forum/techtalk/bilsteins-upside-down-0

Bolter, bolter, full power...

Superlight R # 81

Instagram: superlight_r_81

7 wonders of th...
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Race Billes are mono tube, stock steel ones are twin tube - not sure which version you are running

Richard Price
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"Race Billes are mono tube, stock steel ones are twin tube"

No. I cut up a standard Bilstein a few years ago and it was definitely monotube.

7 wonders of th...
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That's interesting Richard, I spoke with a guy a Bilstein just over a year back about servicing them and the conversation got onto 7 dampers and he said the OE units were based around the B4's twin tube.

I might have a old bent unit somewhere might need to deconstruct it....