Originally Posted by jmone
It's just the Law in NSW.... it does not have to make sense and from what I can see it is just compressed air. I presume it will be quieter so maybe that is the driver but....
From the EPA site for NSW:
Blow-off valves that vent directly into the atmosphere or are capable of being adjusted to vent to the atmosphere must not be fitted. Blow-off valves that vent back into the induction system are quieter.
Wastegates that vent gases directly into the atmosphere or are capable of being adjusted to vent gases directly to the atmosphere must not be fitted. Wastegates must vent gases into the exhaust system upstream of the mufflers and/or catalytic converter. On late model vehicles, waste exhaust gases that vent to the atmosphere upstream of the catalytic converter may also be an offence under the Protection of the Environment (Clean Air) Regulation 2010. )
its not an enviro thing just noise issue from how i read it ?