Balljoint conversion

[d620]

Hi,

I have a Datsun 620 and I am looking to convert the king pins with ball joints, along with the drums for discs. The plan is to purchase custom upper and lower control arms from a small vendor in the states.  This would allow me to use D21 spindles/hubs/brakes/balljoints.  I will also be looking at installing coil over brackets/ coilovers and eliminating the torsion bars.

The welding required for the install would for the adjuster on the lower arm, and the for the coilover mounts.  The upper coilover bracket is installed directly on top of the existing tower once it has been removed, the bottom bracket will sit lower down in the 

I just wanted to check to see if there are any issues with what Im planning on doing, and to find out what the process was to get everything certed.  Would I first take the arms and mounts to get NDT tested before install, then take the car for NDT testing once installed, then contact a certifier once everything passes?  

Thanks,

[Chris]

May 7, 2020 9:06:55 GMT 12 d620 said:

Hi,

I have a Datsun 620 and I am looking to convert the king pins with ball joints, along with the drums for discs. The plan is to purchase custom upper and lower control arms from a small vendor in the states.  This would allow me to use D21 spindles/hubs/brakes/balljoints.  I will also be looking at installing coil over brackets/ coilovers and eliminating the torsion bars.

The welding required for the install would for the adjuster on the lower arm, and the for the coilover mounts.  The upper coilover bracket is installed directly on top of the existing tower once it has been removed, the bottom bracket will sit lower down in the 

I just wanted to check to see if there are any issues with what Im planning on doing, and to find out what the process was to get everything certed.  Would I first take the arms and mounts to get NDT tested before install, then take the car for NDT testing once installed, then contact a certifier once everything passes?  

Thanks,

Gidday D620

Are those arms in the photo the ones you plan on using?

Cheers

Chris

[d620]

Hi,

Yes they're the ones I'm planning on getting.  Here are some more photos of them.

[Chris]

May 7, 2020 10:56:38 GMT 12 d620 said:

Hi,

Yes they're the ones I'm planning on getting.  Here are some more photos of them.

Hi D620

The information you have provided suggests this IFS requires TAC approval. It appears the bottom arm uses modified suspension pickup points and the top arms are very similar to a type we have previously considered as a complex design arm. Both of which require TAC approval.  This guide will give you an idea of the process. www.lvvta.org.nz/documents/infosheets/LVVTA_Info_11-2012_LVVTA_Approval_Application_Guide.pdf  Take a read of the Component Single Approval section.

Cheers

Chris

[d620]

Thanks for the advise, I will see if I can get drawings of the arms to proceed with the process.

[d620]

Hi,

Would drawings of the arms suffice? Or would they need drawings of it mounted as well.

[Chris]

I would provide the mounting as well. The more applicable information you provide for the TAC, the less chance there will be for TAC to come back with further questions.

Download this chapter of the CCM for the TAC application. www.lvvta.org.nz/shop/chapter-4-build-approval-process/