Captive Springs via restrictive straps

[vroom]

Hi there,

Regarding this information copied from the WoF guide (VIRM)'modification threshold'.

Fitting of or modification to: Springs and shock absorbers
LVV certification is not required provided that:

"* replacement springs are self-retaining in their seats at full extension, without the use of non-standard devices such as wire-ties, straps, or external spring locators"

I understand this comes from a list of modifications that don't require a LVV cert however, does this mean the use of additional devices restricting travel of the lower control arm such as a strap is LVV certifiable?

Your help would be appreciated,

Thanks Sam.

[Rob]

Hi Sam

Yes a strap or other means of limiting suspension "droop" potentially could be certified. The LVV requirements state - Coil springs fitted to a low volume vehicle must be firmly contained within their locating seats in such a way that the springs can not rotate, move vertically, or become dislodged when the suspension travel reaches its maximum rebound, limited by either:
(a) a shock absorber of a compatible stroke length; or
(b) properly fastened retaining clamps; or
(c) properly fastened wire-rope straps of the type used in motor-sport applications, provided that the suspension mounting points are sufficiently strong to withstand the increased loadings imposed by the straps reaching the end of their travel, particularly in the case of MacPherson-strut suspension systems.

Your LVV certifier would need to assess the modifications to ensure they meet the requirements and have been carried out to a tradesman like standard.

Regards

Rob