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Pollution gear for 9/74
Posted: Fri Apr 15, 2005 1:06 pm
by 2car
I'm wondering what pollution gear I am requried to have on my 9/74 petrol passenger car. I have positive crank case ventilation and automatic choke. Do I need EGR and charcoal cannister? Are there any good references on the topic? Where can I get a copy of the relevant ADRs?
Thanks
Ben
P.S. I'm going to say 'Just put it on LPG' to save someone else the trouble
Posted: Fri Apr 15, 2005 2:54 pm
by -Scott-
I had a March 1974 petrol with PCV and automatic choke.
My mother's 1975 model had charcoal cannister, but I don't think it had EGR.
I think ADR27A was the big one - what's on your compliance plate?
Posted: Sat Apr 16, 2005 4:11 pm
by 2car
NJ SWB wrote:I had a March 1974 petrol with PCV and automatic choke.
My mother's 1975 model had charcoal cannister, but I don't think it had EGR.
I think ADR27A was the big one - what's on your compliance plate?
Good info. I'll check the plate. Did your 74 have a hot air stove?
Posted: Sat Apr 16, 2005 5:46 pm
by -Scott-
I'm not sure what that is. If you mean a warm air intake coming from the exhaust manifold, I really don't recall. It had a Weber and extractors almost as soon as I bought it, so I don't remember the original configuration.
I don't think the '75 had that arrangement either, but I could be wrong.
If a "hot air stove" was something completely different, you'll have to explain it to me.
Scott.
Posted: Sat Apr 16, 2005 5:48 pm
by adam.s
I thought anything pre-86 wasn't required to have emissions gear fitted, that's why you can get away without running a cat on them - and probably because they didn't have one when it came from the factory.
Posted: Sat Apr 16, 2005 5:56 pm
by -Scott-
1986 was the introduction of unleaded petrol. Well before that we had emissions regulations which brought us the joys of
Positive Crankcase Ventilation - feed oily crankcase fumes back into the air intake.
Automatic chokes - can't trust people to use a manual choke properly.
Carbon Cannisters - capture fumes from the fuel tank and feed them into the intake.
EGR valves - recycle some exhaust gas to reduce the amount of oxygen in the cylinder, to reduce NOX emissions.
Air pumps - inject air into the exhaust for some strange reason 
Skinny little exhausts - create back pressure and force the engine to warm up quickly.
There's probably others I've missed, but unleaded petrol wasn't the start of it...
Cheers,
Scott
Posted: Sat Apr 16, 2005 11:48 pm
by 2car
NJ SWB wrote:I'm not sure what that is. If you mean a warm air intake coming from the exhaust manifold, I really don't recall. It had a Weber and extractors almost as soon as I bought it, so I don't remember the original configuration.
I don't think the '75 had that arrangement either, but I could be wrong.
If a "hot air stove" was something completely different, you'll have to explain it to me.
Scott.
warm air intake coming from the exhaust manifold = hot air stove.