Over Flow Tank and Charcoal Canister 914-6 Options

[Mike Fitton]

I have researched on this forum for a couple of days trying to figure out if the 914-6 came with an expansion tank and charcoal canister, I do not have either on my '70 # 2604. My 6 has the brackets for the expansion tank so that seems logical but I have seen a lot of posts saying the 6's did not have a canister, does anyone have an original 6 that could comment on this. Thanks!

[toolguy]

Since the recovery system is an EPA requirement, whatever the smog / emissions requirement for 1970 would have dictated which vehicle had the tank, filter system. .
I know Calif required them, but what about other states? I do know the
emissions sticker on the fan shroud states the motors comply with New York requirements, anyway mine does.

[Racer]

Since the recovery system is an EPA requirement, whatever the smog / emissions requirement for 1970 would have dictated which vehicle had the tank, filter system. .
I know Calif required them, but what about other states? I do know the
emissions sticker on the fan shroud states the motors comply with New York requirements, anyway mine does.

Well, related from a 914/6 question would be.. did the 911's have them as well for 1970? Did they have them as early as 1969? If so, then then the whole Porsche lineup would have had them for 1970.

However, if this was a reaction to the US passing the Clean Air Act in 1970, then it would make sense it could have been a midyear improvement, and conceivable a dealer "retro- active" installed requirement for later cars that sat on the lot? Just a thought.

I also imagine it was quite popular back then to remove "emissions" related things.. in the name of better performance and finding cars that haven't been "molested" for 47 years isn't easy...

[wonkipop]

Since the recovery system is an EPA requirement, whatever the smog / emissions requirement for 1970 would have dictated which vehicle had the tank, filter system. .
I know Calif required them, but what about other states? I do know the
emissions sticker on the fan shroud states the motors comply with New York requirements, anyway mine does.

Well, related from a 914/6 question would be.. did the 911's have them as well for 1970? Did they have them as early as 1969? If so, then then the whole Porsche lineup would have had them for 1970.

However, if this was a reaction to the US passing the Clean Air Act in 1970, then it would make sense it could have been a midyear improvement, and conceivable a dealer "retro- active" installed requirement for later cars that sat on the lot? Just a thought.

I also imagine it was quite popular back then to remove "emissions" related things.. in the name of better performance and finding cars that haven't been "molested" for 47 years isn't easy...

think you might be on the money.
govt. laws kicked in for calendar year?
cars are on model year spanning calendar mid years.
might have kicked in with US cars after end of dec 69?

fair point too as to what constitutes an unmolested car.

as an aside, we've been delving into the can/hose layout in 74 1.8s in originality forum.
have worked out somewhere along the line the plumbing to the cans got changed, at least in the 4 cylinder cars. not just to with running hoses to can in front or shorter hoses to can in engine bay, but changed which hose went into which end of can. porsche definitely had a policy of how to plumb this system to the fan (in early 70s 911s) that was the opposite of how VW plumbed their cars (bugs, buses, 411s etc). the vo-po is interesting territory........ as its neither or both?