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Nitron NTRs newly fitted but they 'clunk, of small potholes - Ride/Handling/Suspension/Brakes/Wheels/Tyres - The Lotus Forums Jump to content
MartinHarris

Nitron NTRs newly fitted but they 'clunk, of small potholes

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Just had some single way adjustable Nitron NTRs fitted to me 2001 Elise along with new balljoints and bushes all round plus full Geo set up.

All lovely handling but I get a distinct 'clunk' when I hit the smallest of potholes or manhole covers. I took it back to the garage (Porsche specialist rather than Lotus as there isn't one locally) and he thought one bolt wasn't tighten properly but it still does it.

Anyone come across this before??

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Assuming the ball joints and bushes were done correctly...

 

I'm guessing either the body of the shock is hitting on the bracket on the chassis at full bump, or the springs are a bit to o short and as the suspension droops, the spring suddenly becomes free and then clunks back into place. 

 

I've seen the USA Elise front upper shock mount brackets are too narrow for Nitrons.

29214d1148863334-nitron-track-dampers-sp


Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

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But the shock to bracket distance doesn't change on a bump and if the arms swing in an arc, the shock should move away from the bracket on a bump as it pivots. (minimal) Unless the shock is already touching.


All we know is that when they stop making this, we will be properly, properly sad.Jeremy Clarkson on the Esprit.

Opinions are like armpits. Everyone has them, some just stink more than others.

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But the shock to bracket distance doesn't change on a bump and if the arms swing in an arc, the shock should move away from the bracket on a bump as it pivots. (minimal) Unless the shock is already touching.

 

The shock hits on droop.


Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

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That makes sense Travis. I wonder if the bracket could be relieved slightly? It seems that everyone that puts new shocks on that are aftermarket gets the same issue.

I doubt that relieving the bracket away from the shock body would cause a problem as the bracket is working against primarily upward force?

 

Not ideal by a long shot.


All we know is that when they stop making this, we will be properly, properly sad.Jeremy Clarkson on the Esprit.

Opinions are like armpits. Everyone has them, some just stink more than others.

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So had a look today and Travis is definately right at least in part. The top of the shocks is definately hitting the bracket and had splayed them out a bit like his photo. I eased them out a fair bit further but am still getting the clunk! Don't fancy grinding the bracket away as I don't want to weaken it.

Wonder if someone makes wider ones??

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Where did you get them from ?

My understanding was that Nitrons come in two different body widths?

I thought the ones with a wider body were supplied with new top mounts.............

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Got them from Hanger111 so would have thought they knew what they were ordering? Might check with Nitron though. Thanks for the tip.

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I bent them out on 2 cars...  But yes they do make new top mount brackets that fit the Nitrons.

 

http://www.sector111.com/parts/performance/suspension/nitron_spares.cfm


Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

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Be nice if they brought that to your attention in the first place.


All we know is that when they stop making this, we will be properly, properly sad.Jeremy Clarkson on the Esprit.

Opinions are like armpits. Everyone has them, some just stink more than others.

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