The LVVTA have taken it upon themselves to approve the design and geometry of the steering and suspension for 2700. To get the approval a complete set of dimensioned plans and elevations must be submitted to the Technical Approval Committee (TAC), who only meet on a monthly basis, the next meeting being the end of January 2014. If the manufacturer should not wish to hand over a set of their proprietary drawings (as would be expected), then it is up to the owner of the vehicle to have these drawn to satisfaction of the TAC
Below is a copy of their requirements:
Custom Independent Front & Rear Suspension (IFS/IRS) Approval
It is necessary for the applicant to present to the TAC all relevant information in a clear and logical form, and include a proper set of drawings, prepared to scale and showing all details clearly.
Detail Requirements:
There are large amounts of detailed information required by the TAC to enable them to accurately assess a custom IFS or IRS assembly. It is critical therefore, that all of the following details are provided along with the completed IFS or IRS Approval Application. It is recommended that the following is used as a final check-list, to be sure that all of the required information is provided.
- Completed Custom IFS/IRS Approval Application Form 4C.
- Any additional pages included in the application as an appendix to Form 4C, must be added at the end of the application form, and all pages must be numbered.
- Dimensions between all pivot point centres on the complete suspension setup ; and for an example, see sample drawing ‘Front Elevation view’ and ‘plan view’ below.
- Upper and lower a-arm shapes and dimensions. Actual arm shapes must be exactly duplicated; and for an example, see ‘Upper and lower a-arm shapes and dimensions’ below.
- Construction and type of pivot joints/bushes; and
- Spindle/stub axle details, include type, diameters, and notice of any machining to be carried out; and
- Brakes – Callipers and disc set up, and brake hose attachments and routes; and
- Steering setup including rack or steering box details and mounting details, with any rack modifications noted; and
- Dimensions of main supporting subframe and details of attachment to the chassis; and for an example, see sample drawing ‘Front Elevation view’, ‘plan view’, and ‘a-arm attachment details’ below.
- Details of coil/shocks and method of mounting; and
- Types of welding proposed, and the person who is to carry out welding; and
- Full material specifications are required for each component. This includes tube diameters and thickness, steel plate thicknesses, stainless steel and mild steel grading, fastener details, bush materials, (eg: urethane etc).
