After market knuckles

[nismo15]

Hey, what's the story with after market knuckles, (front and rear) more specifically the ones from gktech for silvias/skylines

I understand there is some sort of process to to go through to get them approved before the car can be certified?

I live locally and can stop by the office if you guys haven't seen them in person? they are a great piece of engineering!

What do I need to do to get the ball rolling?

Cheers!
 

[Leon]

Hi, when you say knuckles, do you mean spindles? Have a read of the below, and see which applies to your scenario.

From the hobby car technical manual
hotrod.org.nz/Merchandise%20Page%20Files/Hobby_Car_Technical_Manual.htm


Custom stub axle design and construction in front
suspensions
6.14.1
A custom spindle fitted to a low volume vehicle that is either
integral with the stub axle assembly, or separate to the stub axle
assembly, must not be manufactured using a casting process.
6.14.2
A custom spindle fitted to a low volume vehicle, that is separate
to the stub axle assembly, must:
(a) be manufactured from a high quality low alloy steel; and
(b) incorporate correct machining procedures including
maintaining the correct radii at diameter changes; and
(c) be comparable in all critical dimensions to a spindle from a
production vehicle of a similar weight as that of the vehicle
to which the custom spindle is fitted.
6.14.3
A custom-built stub axle assembly may be fitted to a low volume
vehicle provided that it has been individually approved in writing
by the Technical Advisory Committee of the Low Volume Vehicle
Technical Association (Inc), through the build approval process
specified in ‘Chapter 4 - Build Approval Process’, prior to the
commencement of construction.

[nismo15]

Yes, Well Spindle and rear hub carrier

6.14.1 - Yes
6.14.2 - Yes
6.14.3 - Need to get done, How?

Rear Hub Carrier/Knuckle
www.gktech.com/index.php/s-r-z32-chassis-rear-knuckles.html

Front Knuckle/Spindle
www.gktech.com/index.php/v2-s-chassis-front-drop-knuckles.html

Who do I take them to for approval?

Cheers!

[Leon]

Follow this link, the 4B (Design Approval) section is what you'd need to work through (not the 4A Concept Approval)

www.lvvta.org.nz/documents/suplementary_information/Form_4B_Design_Approval_Application.pdf

You'll need to do the section of 4B that applies to your stub axle assembly. So you will need to work with GKTech to get material specs, measurements, and construction method.

[lukeob]

Did these knuckles ever get approved? I am looking at the latest versions.

[Chris]

Aug 4, 2022 15:34:07 GMT 12 lukeob said:

Did these knuckles ever get approved? I am looking at the latest versions.

Hi Luke

TAC usually only approves these as a single component unless full component type approval has been applied for and granted. This process is typically between the wholesaler or manufacturer of a component and TAC. The wholesaler or manufacturer should be able to provide a certificate from LVVTA to provide to your certifier if it has successful approval.

See - www.lvvta.org.nz/documents/infosheets/LVVTA_Info_11-2012_LVVTA_Approval_Application_Guide.pdf

Cheers

Chris