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Old 12-09-2011, 05:26 AM
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Modena Modena is offline
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hrm interesting, it seems this may be the case.

the full ADR is here (PDF), updated as recently as January 2011;

http://www.comlaw.gov.au/Details/F20...4-45f84a9787d4

The relevant extract is below - note that there are requirements listed for LE (trikes), MD & ME (bus), and N (goods vehicles). There are no requirements listed for MA,MB,MC which are the passenger vehicle classes;


10. EXHAUST OUTLETS
10.1. Enclosed LE vehicles must meet the following requirements:
10.1.1. the exhaust outlet must extend at least 40 mm beyond the furthermost
outboard or rearmost joint of the floor pan which is not continuously
welded or permanently sealed which could permit direct access of
exhaust gases to the passenger compartment, but not beyond the
perimeter of the vehicle when viewed in plan;
10.1.2. the exhaust outlet, if to the side of the vehicle, must discharge to the right
hand side of the vehicle and downwards at an angle to the horizontal of
not less than 15 degrees and not more than 45 degrees; and
10.1.3. the exhaust outlet, if to the rear of the vehicle must discharge at not more
than 10 degrees above or 45 degrees below the horizontal.
10.2. Omnibuses (MD and ME Vehicles)
10.2.1. the exhaust outlet must be as near as practicable to the rear of the vehicle;
10.2.2. except in the case of vertical exhaust systems, the exhaust outlet must
discharge rearwards or to the right of the vehicle, either horizontally or at
no more than 45 degrees downwards, and must not extend beyond the
perimeter of the vehicle when viewed in plan; and
10.2.3. when the exhaust outlet is vertical, it must be located behind the rearmost
portion of the passenger compartment and may discharge either vertically
upwards or rearwards at any angle above the horizontal.
Federal Register of Legislative Instruments F2011C00102
Australian Design Rule 42/04 – General Safety Requirements 8
10.3. N-Group Vehicles must meet the following requirements:
10.3.1. the exhaust outlet must be behind the rearmost seating position and at
least 40 mm beyond the furthermost outboard or rearmost joint of the
floorpan which is not continuously welded or permanently sealed, and
must not extend beyond the general perimeter of the vehicle when
viewed in plan. In the case of permanently enclosed vehicles not fitted
with vertical exhaust systems the outlet must extend to the perimeter of
the vehicle when viewed in plan;
10.3.2. the height of the outlet must be either greater than 150 mm above the
maximum height of the cab or less than 750 mm above the ground;
10.3.2.1. for above-cab exhausts, the direction of discharge must not be to the left
of the vehicle and must be above the horizontal ;
10.3.2.2. for other exhausts, the direction of discharge must not be to the left of the
vehicle and must be between the horizontal and 45 degrees downwards;
and
10.3.3. any exposed section of an exhaust system discharging above the cabin
must be shielded to prevent accidental personal contact in areas where
contact can occur during normal operating and servicing conditions.
10.4. Vertical exhaust systems, where fitted, must meet one of the following
requirements:
10.4.1. the orifice must be a horizontal cross-section of the exhaust pipe and
must direct the exhaust gases vertically upwards; OR
10.4.2. the orifice must be a horizontal cross-section of the exhaust pipe and
must be fitted with a rain cap such that in plan view the hinge of the cap
makes an angle of 90 degrees ± 10 degrees with the longitudinal
centreline of the vehicle, with the rain cap operating in a fore-and-aft
direction; OR
10.4.3. the orifice must be angled and orientated so that the principal flow of the
exhaust gases is directed rearwards, within 0o and 45o the longitudinal
centreline of the vehicle.



Gettiing sidepipes to comply with noise (ADR 83/00) might be another issue.....
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