Changing coilover brands post certification

[brock]

Hi there,

I'm looking for some guidance about obtaining certification with a particular brand of coilover, but then later down the track changing to a different brand (however keeping to all the original certified measurements (ie height, droop etc)). Does this require a re-cert? 

Given that the recent cert changes will have photos of the car at the time of certification more readily available, my concern is that when it comes to WoF, the car will be rejected on the basis that the coilover is different to what was initially certified for. This is on the assumption this was allowed in the first place with the old plate system. 

Other things to note:

• That this is on the assumption that the coilover that is replacing the 'certed' one is of equal or superior quality (Lets say you're moving from D2 to TEINS or any known brand/type that has been certified in NZ)
• An example of where this is practically applicable could be that you have built a track/street orientated car, and found that the coilovers that were currently certified are the limiting factor and should be upgraded, OR the coilovers were too harsh for street use and needed to be downgraded. 

Apologies if this has already been answered! The closest thread I could find was lvvta.proboards.com/thread/655/changing-shock-absorbers, however I felt like it referred to a repair/modification in relation to if its equal to OEM and not what the car had been certified for. 

Thanks in advance! 

[Chris]

Sept 15, 2022 13:39:54 GMT 12 brock said:

Hi there,

I'm looking for some guidance about obtaining certification with a particular brand of coilover, but then later down the track changing to a different brand (however keeping to all the original certified measurements (ie height, droop etc)). Does this require a re-cert? 

Given that the recent cert changes will have photos of the car at the time of certification more readily available, my concern is that when it comes to WoF, the car will be rejected on the basis that the coilover is different to what was initially certified for. This is on the assumption this was allowed in the first place with the old plate system. 

Other things to note:

• That this is on the assumption that the coilover that is replacing the 'certed' one is of equal or superior quality (Lets say you're moving from D2 to TEINS or any known brand/type that has been certified in NZ)
• An example of where this is practically applicable could be that you have built a track/street orientated car, and found that the coilovers that were currently certified are the limiting factor and should be upgraded, OR the coilovers were too harsh for street use and needed to be downgraded. 

Apologies if this has already been answered! The closest thread I could find was lvvta.proboards.com/thread/655/changing-shock-absorbers, however I felt like it referred to a repair/modification in relation to if its equal to OEM and not what the car had been certified for. 

Thanks in advance! 

Hi Brock

Yes, changing adjustable suspension will require re-certification and it always has been that way, it is only that it is more easily identified as a change with the new EDP system.

Cheers

Chris