NSW Pollution Laws 1980's

[mick taylor]

NSW brought in stricter Pollution Laws in late XD and XE and XF.

Does anyone truly know totaly what the diffrence was that they did to NSW cars .
Lower compression on NSW 3.3L and 4.1L Why would they of done that ? and less power ! and fuel economy suffered in fact, regarding the testing standards of the day.

The 4.9L V8 got the same compression but stated same power but fuel economy suffered !

Did they get a different Camshaft setting rertarded abit more ? or some set settings difference to take advantage of the lower compression ? or just different spark timing settings ?

Later XF P van 3.3L auto does not pass NSW ADR !

And the later VC and VH 3.3L 4sp Commodore does not pass in NSW so you could not option that in NSW The VC-H 3.3L does not have an Air Pump that pumps air into the exhaust system so to burn off more unburnt fuel, a system before the can converter !

But the carby VK 3.3L gets the Air Pump so to pass NSW ADR.
VK 3.3L EFI does not need Air Pump !

But the 2.85L in the VH got the Air Pump and passed NSW ADR.

Thing is that the 3.3L VC-H with auto did pass NSW ADR ! but they run EGR, ADR27A Holdens with Manual box do not have EGR ! only the Auto's have EGR !

But all XC on have EGR regardless ! and Cortina 6 cyl. but NSW Cortina 6 cyl does not need to change to meet NSW Strict ADR Laws at all ! so their engines are just as the rest of Australia ! because they are lighter they must of passed the Test !

Oh and that awesome Starfire 4 got an Air Pump as well in the VH.

I have seen F100 with 4.1L ADR got less power figures posted than the Ford Falcons. maybe they are NSW ADR spec's !

Valiant Chryslers ended just befor the NSW ADR came into effect.
But i do not think that the 245 and 265 hemi 6 got EGR at all due to the advanced system they used back in the days.

Does anyone know such things better than me !