1974 914 1.8, the mystery of the EC-A and EC-B Options

[wonkipop]

i'll be dropping the information we have gathered over Dec 2021 in with a set of posts.

the material was prompted by mr b ( @JeffBowlsby ) who observed that for the 74 MY there was an EC-A and an EC-B engine. mr b's thought was that the EC-A was a 49 states car and and EC-B was a californian car for emissions.

mr b's view was rational and reasoned. 73 EA engines are 49 states. 73 EB engines are california. 75 engines are documented in factory literature as EC-a (49 states) and EC-b (california). the logic should follow?

BUT

as per the mystery of the 914, the truth about 74 1.8s turns out stranger than fiction (or common sense?).

the material is not necessary to running a 1.8 or having fun with a 14. (IMG:style_emoticons/default/smile.gif)

its for historical purposes and as information to 74 1.8 owners to assist with restoration if they want it.

[wonkipop]

DATE - UP DATE OF VAPOR EMISSION CONTROL SYSTEM.

location of charcoal canister location changed from front trunk to engine bay.





EDIT MAY 2022

changeover from frunk canister to engine bay canister occurs after
VIN 4742909096 and 4742909104 on 20 Nov 1973.

refer page 2 of this thread for information/data.

EDIT JUNE 2022

a further example came to light.
VIN 4742908765 with engine can.
indicates changeover either side of weekend 17/18 Nov 1973.
Vins may not be in strict chronological order exhibiting the can location change as some Vin cars are completed in a different order to the production plate #s.

refer page 2 of this thread for information/data.

EDIT AUG 2022

to note regarding 4742909096 & 4742909271 - insufficient data was available to determine if these cars may have had earlier fuel tank type fitted while canister location had been updated to engine bay. it remains a possibility that the charcoal can location was updated as early as 4742908765 and stocks of earlier fuel tanks were used until depleted to be replaced by updated fuel tank with mounting bracket and seam slot no longer included.