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914/4: 70 71 72 73 74 75 76 914/6: 70 71 72

> 1974 914 1.8, the mystery of the EC-A and EC-B
wonkipop
post Dec 25 2021, 05:12 PM
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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.
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StarBear
post Jan 25 2022, 06:39 PM
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Yep, I'm convinced. Probably (?) not a single date as you said, all cars weren't produced/finished in precise sequence. Wonder, though, why the change not at the MY beginning - parts supply availability? using up existing parts inventory (my bet)? (IMG:style_emoticons/default/dry.gif)
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wonkipop
post Jan 25 2022, 07:24 PM
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QUOTE(StarBear @ Jan 25 2022, 06:39 PM) *

Yep, I'm convinced. Probably (?) not a single date as you said, all cars weren't produced/finished in precise sequence. Wonder, though, why the change not at the MY beginning - parts supply availability? using up existing parts inventory (my bet)? (IMG:style_emoticons/default/dry.gif)


yep. they would be using up inventory of pressed panels.
the engine bay rear firewall has a little pressed indentation with the drilled hole to mount the cannister and the front firewall area no longer has the holes for the hoses to a front mounted can. they would have been using up the panels they had before moving on.

an ideal date for factory purposes would have been a monday.
i assume they would have been counting stock and fine turning scheduling date to remaining stocks. given what i found above i'd call it as that fell on a tuesday.

i believe the change in position of the can is a deliberate move to alter the whole system and to ensure that previous practices on hose hook ups are relearnt afresh.
as you know i am sticking to my view that the can hook up is reversed with the charcoal can in the engine bay. all the evidence says so including our cars which were/are in original condition. also they changed the 911s in 74. a similar deliberate move was made and the cans were moved to the rear of 911s at that time as well as altering the hose connection hook up. as to why not the start of the model year, the answer is connected to the late commencement of production of 1.8s. its got something to do with coming under scrutiny of the EPA for cheat devices. you can bet your life that the EPA put VW under the microscope in mid 73 and examined all their emission devices. they would have went through everything with a fine tooth and comb.

all the evidence (all of it reputable factory literature) indicates VW plumbed up their evap system the way it is done on engine bay can 914s from nov 73. VW had been doing it that way on their cars since 1970. only the 914 (and the 911) were plumbed up the opposite way up to MY 74. you can bet your life the EPA would have picked up that discrepancy because the 914 was essentially a VW model with a VW engine. i think what happened is that VW and porsche at that point brought their emission systems into consistency across the range. (to note porsche were using VW evap system components on the 911 lock stock and barrel). it would have been a bit confusing argueing it worked either way? the 914 had the same set up as the 911 (a porsche design) until that moment in 1973 when it changed over.

be interesting to know the exact date when porsche changed it over on 911s.
my bet is on around about the same time, part way into MY 74.
and as a result of EPA negotiations.


a further clue to this would be original glove box manuals that came with the cars new.
i would expect all the early 74 MY 2.0L cars to have had a emissions warranty booklet that reflected the other plumbing set up of earlier cars.

i would expect all 1.8s after the change to have the emission warranty like the one i have which correctly shows the change in the plumbing.

i would expect all the 2.0s that come after feb 74 to also have that emission warranty booklet that would be like the one i have with my 1.8 (engine bay can).

the check would have to be done with emission warranties that were known to have come with the car new.

part of the problem with restored cars and reprint material or booklets purchased separately is that fine grain of detail gets lost.
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Posts in this topic
wonkipop   1974 914 1.8   Dec 25 2021, 05:12 PM
wonkipop   SURVEY OF MEMBERS WITH 74 1.8s. INFORMATION FROM R...   Dec 25 2021, 05:14 PM
wonkipop   DATE - UP DATE OF VAPOR EMISSION CONTROL SYSTEM. ...   Dec 25 2021, 05:19 PM
wonkipop   EC-A and EC-B engines are most obviously identifie...   Dec 25 2021, 05:41 PM
wonkipop   emission stickers indicate that both engine versio...   Dec 25 2021, 05:47 PM
wonkipop   more to come   Dec 25 2021, 06:29 PM
RRietman   more to come If it makes any difference, I shoul...   Dec 25 2021, 07:41 PM
wonkipop   thanks for that info randy i revised the schedule ...   Dec 25 2021, 08:24 PM
wonkipop   EC-A / EC-B THROTTLE BODY AND DISTRIBUTOR WITH VA...   Dec 25 2021, 09:06 PM
wonkipop   EXCEPTIONAL DATA 1 MYSTERY CAR mr. b has documen...   Dec 25 2021, 09:06 PM
wonkipop   EXCEPTIONAL DATA 2 paint stamp engine number EA 3...   Dec 25 2021, 09:43 PM
wonkipop   EXCEPTIONAL DATA 3 EC-A engined car (california/C...   Dec 25 2021, 10:12 PM
wonkipop   A HYPOTHETICAL. PAINT STAMP ENGINE NUMBER. this ...   Dec 25 2021, 10:32 PM
wonkipop   POST SCRIPT A TROUBLED BIRTH FOR L - JET / THE FI...   Dec 25 2021, 11:21 PM
wonkipop   VAPOR EMISSIONS CONTROL SYSTEM. (aka the charcoal...   Dec 26 2021, 12:38 AM
wonkipop   revising comments welcome. further documented 1.8...   Dec 26 2021, 04:02 PM
StarBear   Destined to be a classic (though imho it already i...   Dec 26 2021, 08:07 PM
wonkipop   post script @StarBear of course the 1.8 is a...   Dec 27 2021, 04:54 PM
Van B   Anyone else notice that hellhole rust on the museu...   Dec 29 2021, 02:00 PM
wonkipop   Anyone else notice that hellhole rust on the muse...   Dec 29 2021, 03:57 PM
Van B   Was there any car in the US that got the AN or AT ...   Dec 29 2021, 07:26 PM
wonkipop   Was there any car in the US that got the AN or AT...   Dec 29 2021, 07:46 PM
Van B   Well, really the point is to find high compression...   Dec 29 2021, 10:54 PM
wonkipop   Well, really the point is to find high compressio...   Dec 30 2021, 05:15 PM
JeffBowlsby   AN engine in a factory 1974 914 GT (European-marke...   Dec 31 2021, 10:25 AM
wonkipop   ^ wow. original motor?   Dec 31 2021, 07:04 PM
wonkipop   @[url=http://www.914world.com/bbs2/index.php?showu...   Jan 25 2022, 06:12 PM
StarBear   Yep, I'm convinced. Probably (?) not a single ...   Jan 25 2022, 06:39 PM
wonkipop   Yep, I'm convinced. Probably (?) not a single...   Jan 25 2022, 07:24 PM
JeffBowlsby   Nice detective work. I know of nothing in conflic...   Jan 25 2022, 07:15 PM
wonkipop   @StarBear production looks to go like this for 74...   Jan 25 2022, 07:51 PM
L-Jet914   What's interesting is when I replaced my ignit...   Feb 1 2022, 11:17 PM
wonkipop   What's interesting is when I replaced my igni...   Feb 2 2022, 04:12 PM
Van B   @[url=http://www.914world.com/bbs2/index.php?showu...   Feb 20 2022, 11:21 PM
wonkipop   @[url=http://www.914world.com/bbs2/index.php?show...   Feb 21 2022, 03:39 AM
Van B   I wonder what it sold for? And do you know if the ...   Feb 21 2022, 10:59 AM
wonkipop   I would say we’re it not for a low budget mecha...   Feb 21 2022, 03:41 PM
wonkipop   also that yellow car is one more confirmation that...   Feb 22 2022, 10:25 AM
Racer   What a rather well documented thread. Question.. ...   Feb 22 2022, 02:28 PM
wonkipop   What a rather well documented thread. Question.....   Feb 22 2022, 04:21 PM
Van B   @wonkipop I remember you saying that about the sw...   Feb 25 2022, 11:56 AM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Feb 25 2022, 08:40 PM
Van B   Its got some PoS KYB on the rear and who knows wha...   Feb 27 2022, 11:14 PM
wonkipop   Its got some PoS KYB on the rear and who knows wh...   Feb 28 2022, 02:15 AM
StarBear   Mine has the appearance group, sway bars and the b...   Mar 24 2022, 06:53 AM
wonkipop   for @Van B came across this image in obscure part...   Mar 27 2022, 01:37 AM
wonkipop   VAPOR EMISSION CONTROL SYSTEM update information....   May 22 2022, 01:03 PM
Van B   @wonkipop My car was not a frunk can. It is a re...   May 25 2022, 09:06 AM
wonkipop   @[url=http://www.914world.com/bbs2/index.php?show...   May 25 2022, 05:02 PM
Van B   Well, it may be inductive reasoning, but given the...   May 25 2022, 05:45 PM
wonkipop   Well, it may be inductive reasoning, but given th...   May 25 2022, 07:20 PM
JeffBowlsby   Wonk, You deserve an award for this charcoal ca...   May 26 2022, 08:52 PM
wonkipop   Wonk, You deserve an award for this charcoal c...   May 27 2022, 03:53 AM
wonkipop   Wonk, You deserve an award for this charcoal c...   May 28 2022, 01:34 AM
wonkipop   After all that research and thanks to all members ...   Jun 5 2022, 01:18 AM
JeffBowlsby   Niiiice. I see that architects hand... :drooley: ...   Jun 6 2022, 06:50 AM
wonkipop   Niiiice. I see that architects hand... :drooley:...   Jun 6 2022, 03:55 PM
StarBear   @wonkipop [b]@[url=http://www.914world.com/bbs2...   Jul 10 2022, 07:59 PM
wonkipop   great stuff @StarBear looks like you guys had a...   Jul 10 2022, 10:03 PM
StarBear   Yep; darn close to pinning it down, I’d say. Gre...   Jul 11 2022, 06:22 AM
StarBear   @rod911964 Rob - Here's the info we were di...   Jul 11 2022, 01:41 PM
wonkipop   @StarBear [b]@[url=http://www.914world.com/bbs2...   Jul 12 2022, 06:29 PM
Van B   Our cars really were like a beta test for the L-Je...   Jul 12 2022, 09:21 PM
StarBear   Our cars really were like a beta test for the L-J...   Jul 13 2022, 02:18 PM
StarBear   Found another 74 (?) this morning behind a garage....   Jul 13 2022, 02:20 PM
wonkipop   came across another plastic expansion tank 74. clo...   Jul 17 2022, 07:04 AM
StarBear   @wonkipop BTW, what color is yours, and what ty...   Jul 18 2022, 06:52 AM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 18 2022, 07:50 AM
wonkipop   just been scratching through my files here a bit m...   Jul 18 2022, 08:02 AM
StarBear   @wonkipop Something special made - for you fro...   Jul 18 2022, 10:46 AM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 18 2022, 04:48 PM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?...   Jul 18 2022, 07:35 PM
StarBear   [quote name='StarBear' post='3016011' date='Jul ...   Jul 19 2022, 06:54 AM
wonkipop   @[url=http://www.914world.com/bbs2/index.php?showu...   Jul 18 2022, 05:17 PM
Van B   @wonkipop how many US spec ‘74 1.8s do you thin...   Jul 18 2022, 05:54 PM
wonkipop   @[url=http://www.914world.com/bbs2/index.php?show...   Jul 18 2022, 06:45 PM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 19 2022, 01:32 AM
Van B   I don’t know how I missed that label lol! Y...   Jul 18 2022, 08:08 PM
wonkipop   I don’t know how I missed that label lol! ...   Jul 18 2022, 08:48 PM
wonkipop   @Van B + [b]@[url=http://www.914world.com/bbs2/i...   Jul 19 2022, 12:12 AM
StarBear   @wonkipop As promised, here's the white font...   Jul 19 2022, 10:44 AM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 19 2022, 03:17 PM
StarBear   "L" is for L-Jet, obviously.....   Jul 19 2022, 10:44 AM
Van B   First off, you two are ridiculous lol... Second, ...   Jul 19 2022, 11:01 AM
StarBear   Good move, Van. My thought is that 1.8s may be th...   Jul 19 2022, 01:06 PM
wonkipop   Good move, Van. My thought is that 1.8s may be t...   Jul 19 2022, 03:14 PM
StarBear   Great! Works for you so go with it. Can apprec...   Jul 19 2022, 07:05 PM
Van B   Well, I straight up missed this page... http://www...   Jul 20 2022, 09:57 AM
wonkipop   Well, I straight up missed this page... http://ww...   Jul 20 2022, 04:37 PM
Van B   Not really. You said you could figure exactly the ...   Jul 20 2022, 05:18 PM
wonkipop   Not really. You said you could figure exactly the...   Jul 20 2022, 05:22 PM
wonkipop   @davep i mentioned in pm that i had also seen an...   Jul 22 2022, 02:00 AM
StarBear   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 22 2022, 05:34 AM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?...   Jul 22 2022, 06:02 AM
wonkipop   new data entered into tables on page 1 of thread. ...   Jul 29 2022, 10:25 PM
StarBear   @wonkipop I’m planning on redoing a sheet of t...   Jul 30 2022, 06:49 AM
wonkipop   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 30 2022, 07:07 AM
StarBear   [b]@[url=http://www.914world.com/bbs2/index.php?...   Jul 30 2022, 10:00 AM
wonkipop   [quote name='StarBear' post='3019138' date='Jul ...   Jul 30 2022, 07:11 PM
JeffBowlsby   I was thinking about the charcoal can air supply a...   Aug 5 2022, 06:18 PM
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