I just got a RWC report done on my R33 and it states "Exhaust system cat back too low" which I don't believe to be true as I've got standard springs and the car passed the last RWC to which I haven't changed anything since. I questioned the RWC workshop and they said I would need to produce evidence of this.
So I called Vic Roads to ask them if they could run the height clearance trolley under my car and issue a report to which they said they can only do this for defected cars. I then asked the operator what the required clearance is but she didn't know exactly, but said to use the height of a 'Coke can' (130mm) as a guide.
I did a bit of digging around and according to Vic Roads VSI 8 under Section 4. Ground Clearance:
The ground clearance of a vehicle measured from a horizontal road surface to any point
on the underside of the vehicle except the tyres, wheels, wheel hubs and brake backing plates
shall, with the vehicle in its loaded state as specified by the manufacturer, be not less than:
for any point in the width of the vehicle which is within one metre fore and aft of any axle, 100mm;
for the mid-point between any two consecutive axles, the dimension in millimetres obtained by multiplying the distance in metres between those two axles by 33.33.
I checked the ground clearance and the lowest point on my car (cat back) is 105mm.
Second to this, I calculated the mid-point clearance by multiplying the distance between the axles (2.8m) by 33.33, which equals 93.324mm
Therefore, by my calculations I am within the legal ground clearance requirement. Or is there something I am missing???