Hub carrier requirements

[deecee]

Hi team,

I own a 1977 Datsun Fairlady Z (240Z, 260Z, 280Z silhouette) and am looking at a rear drivetrain conversion to a Nissan Skyline R200 diff and would like to know if these hub carriers from Techno Toy Tuning are acceptable for certification?

technotoytuning.com/nissan/240z/complete-r200-r230-rear-end-conversion-z-car

As per items 6.28 Custom hub carrier design and construction in rear suspensions, the custom built hub carrier assembly must be approved in writing by the TAC.




Looking at the pictures of the hub carrier, it has been mig welded so would this require cracking testing? Or as it comes from T3 which is a reputable aftermarket manufacturer, is this accepted by the LVVTA without additional testing required?

Reason being is that the complete kit is quite costly to purchase and import, and I wouldn't want to get knocked back for not being up to the quality and engineering standards expected.

In fact, a number of items utilise mig welding as a construction technique such as the front and rear control arms. Would they all need to be tested?

Has this kit or Techno Toy Tuning parts been approved for use by the LVVTA in the past? Ideally I would like to know a baseline of what is accepted or not as I will be looking to start budgeting and purchasing over the next year or two.

Thanks, Dave

[Todd]

As you've mentioned, these items require TAC Approval, and as none have previously been processed, we're unable to give you an answer until they go through the proper process.
(you can find out about TAC approval here: www.lvvta.org.nz/approvals.html#design)

Critical function welds, such as those on these arms require Tig welding. There can be exceptions made, but again, TAC would need to assess this.

My suggestion would be to ask T3 if they can tig weld some, then put them through the process. NDT will also be required.

It may be worth asking T3 for any engineering analysis that hs been performed, as this could help with your application.


Cheers

Todd

[deecee]

Todd - Thanks for getting back to me so soon.

I did a search and found this information regarding parts from Techno Toy Tuning:
lvvta.proboards.com/thread/378/aftermarket-suspenion-rose-joints

Will I need to get fabrication process and confirmation of qualified welder undertaking the work to support the submission?

[Todd]

No worries.

No need to get the fabrication processes or any evidence of a welder's qualifications, as the welding requirements here are that a welder must be competent. i.e, if it looks like bird poo, the welder clearly isn't competent.

If they've designed the components properly, they should have engineering calculations that show how strong the components are etc. While this is not a requirement to get them, if you can, it may be useful to help show the TAC that they're ok.