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By 55ebird - 13 Years Ago
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I have noticed that the bottom surface of the factory dual quad manifolds sometimes has two large set screw type bolts while some manifolds have a completely smooth bottom surface. What is the significance of these differences? Pictured below is a two-bolt type. 
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By Oldmics - 13 Years Ago
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While Ted makes a good point, I"m throughly convinced that each of those plugs adds 5 horsepower for a 10 horsepower total gain.  Its a deep Ford racing secret from way back so dont tell anyone.  Oldmics
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By 55ebird - 13 Years Ago
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Ted, thanks for the info. I'm still a bit confused though. I have a factory dual quad manifold (ECG 9424D) that does'nt have the casting plugs. The bottom surface is completely smooth. Were some made that way and others not? Thanks again for your expert information!
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By Y block Billy - 13 Years Ago
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Sorry Oldmics, I got to let out the secret. They would have a bottle of nitrous hidden under the car and plumbed up the back of the motor under the intake to those plugs very inconspicuosly, then it was actuated by the overdrive kickdown switch under the gas pedal. People thought they just had a normal overdrive. Others just used the plugs to drain the manifold if they had leaky power valves in their carbs.
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By 55ebird - 13 Years Ago
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Ted, i stand corrected. Went out to the garage yesterday and the smooth surface i thought existed on the ecg 9424 D wasn't smooth at all. It had been so long that i had looked at it. It has the two plugs just as you said they all had. My apologies for the erronious post.
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By Oldmics - 13 Years Ago
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To which I can add (notice now we have some consecutive dates for production of the manifolds) 10-15-56 12-5 12-13 (then Teds 12-14) 1-18 1-22 Teds 2-28 3-6 , 3-7 , 3-8 Theres a good run ! 3-13 3-29 Teds 4-3 6-5-57 (Teds) -then 6-6-57 6-10 Bring em on Oldmics
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By Genuinerod - 13 Years Ago
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Mine is 1-22 with the "S" on the bottom.
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By pegleg - 13 Years Ago
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Those plugs were to close up two holes which would have been used to support the heater core during the casting process. They would also have been helpful in removing the core sand after casting. Designers try to eliminate them, foundry guys put them back in to reduce scrap and core removal issues. Ted's got it right.
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By carl - 13 Years Ago
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I have a ECG-9424- D manifold that just has one plug on the bottom,also the number i found was on 5-6 runner and it is 1-63 G9, so is that a date code ? Carl
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By carl - 13 Years Ago
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Ted I will try to post a couple pictures of the intake this week Carl
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By Dennis K. - 13 Years Ago
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My 8V intake has a cast in 1-9 date code on top near the thermostat port, two diagonal threaded core plugs, and a stamped "S" below the cast in "ECG9424-D" part number on the bottom side. Another comment is the ratio of 8V intake manifolds one sees, compared to the correct 8V carbs and/or linkage sets. Regards, Dennis
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By tbirddragracer - 13 Years Ago
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Ted,
Dual four manifolds
12-14
3-29
2-28
3-13
Ernie Phillips
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By Oldmics - 13 Years Ago
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Ted (10/4/2011)
Spotted today at Hershey-12-28, 2-4, 6-3 Added to the list Thanks to all for the updates. Here’s the revised list thus far for 25 intake manifolds. Carl’s intake falls outside of the list for now. 10-15-56 (JH) 12-5 (JH), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-28 (JH) 1-9 (DK), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-29 (Ted), 3-29 (EP) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-10 (JH) Spotted today at Hershey-12-28, 2-4, 6-3 Added to the list Oldmics
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By YBLOCKMERC - 13 Years Ago
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I was at the Monroe Swap Meet in Washington today and found two 8V manifolds. One had the two threaded plugs in the bottom and 12-6 on top of the thermostat cavity. It had two Carter WCFBs on it but no linkage. No idea if they have ever been run on the manifold.
The other was an ECZ 9424-C with no large threaded plugs on the bottom although there was one small (~.25) threaded cap on the bottom.
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By ecode ragtop - 13 Years Ago
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My 2x4 intake has a casting date of 12-17 Tom
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By Flatrod - 13 Years Ago
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My ECG-D intake is dated 6-6-57.
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By carl - 13 Years Ago
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Ted I cleaned up the 2x4 intake and it was cast with the two plugs but one had been removed and welded shut ,you can see the outline of the hole.I cant find a date code on it.I took a couple pictures and will try to get them sent to you .Carl Lynn
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By Oldmics - 13 Years Ago
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Now thanks to fakirone who just posted an "E" manifold for sale currently on eBay http://www.y-blocksforever.com/forums/Topic66822-7-1.aspx There is a 5 28 57 marked intake for our records. Thats the first May built intake manifold that we have heard of. Oldmics
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By NoShortcuts - 13 Years Ago
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I have a 1-9 manifold, also.
As Dennis K. said previously, it is AMAZING how many 2x4 Ford intake manifolds seem to be on eBay, at swap meets, etc., BUT orphaned from their original carburetors, linkage assemblies, fuel filters, valley pans, and air cleaners. My manifold came with a car and a bunch of miscellaneous y-block parts, but nothing else for the 2x4 assembly.
I suspect that many clone (reproduction) parts are easily passed off as 'original' to those of us that haven't studied known original assemblies.
Does anyone know of a source for reproduction original style oval ('56 PowerPak) air cleaners?
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By Oldmics - 13 Years Ago
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Those two barrel carb equipted "Y" engines were 292s. They are kind of common but still a curiosity in T Bird world. The 1957 T Birds that were the cheapo model were equipted with the 292 and sporting the recessed valley pan. I beleive Ford had some extra "E" valley pans which they decided to use up on the 292 T Bird engines.Perhaps some other body styles also but I have only seen them on 292 T Birds from the factory. Oldmics
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By yalincoln - 13 Years Ago
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when did they go from useing 4 hole to kidney shaped intakes?  
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By randyh - 13 Years Ago
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I checked my 2x4 manifold, it has 12-5 date code. It used to be on my father's Custom he was running it hooked up to the McCullogh blower. RH
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By yalincoln - 13 Years Ago
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thanks john, i knew that. i just thought we could figure out when they switched from 8 hole to kidney shaped intakes. what was the last production date for the 8 hole and what was the first production date for the kidney shaped intake. sorry but i have a lot of time to waste on insignifiant data.
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By Oldmics - 13 Years Ago
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Y/A Thats an interesting question about the casting date of the 56 manifold and the 57 manifolds. I believe that there were only 2 runs of the 1956 casting. This belief is based upon the observation of two styles of the 56 manifold.The only real differences being the part number is cast on the bottoms in the majority of the 56 intake (same as the 57s) and another run where the part number is cast on the top side of the manifold. Dating either of these is tough. I have Ford documentation from May 7th referring to an earlier announcement that was made in latter April of 1956 regarding the dual quad race kits availiability. So it appears that prior to or in April the 56 manifolds were manufactured. Oldmics
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By yalincoln - 13 Years Ago
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hi, i found a spec. chart for 56 nascar in a july 56, motor life mag. it shows 56 ford, 230 hp, 292 2x4, 62 cc heads, EDB-B cam, 2-EDB-C carbs. 56 merc, 260 HP, 312 2x4, 62cc heads, ECZ-B CAM, 2- edb-c CARBS. 56 CHEVY, 225 hp 2x4, 54cc heads, cam 3711354-3711355, carbs 3730599-3720553. i scan'd the sheet but i can't get it to download to attachments, i think it's to large, sorry.
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By Oldmics - 13 Years Ago
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YA Excellent information.I concur with all of the Ford/Mercury specs.I dont know about the "scrub" info but I would think that it is also correct. That is a good piece of information that you have there.It took me years to find all that same info. Not only do I have that info,I also have the majority of those parts N.I.B. The 56 Mercury info you referenced was referred to as the M 260 setup. Check my avitar to see the original fender emblems for the M 260. Oldmics
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By famdoc3 - 12 Years Ago
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My manifold say 3 26 on it. I've been running it since 1971 now with injection. Looks like March was a popular month.
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By Oldmics - 12 Years Ago
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There is a manifold currently on eBay that is listed as having a date of 5-8 cast on it. http://www.ebay.com/itm/56-57-FORD-THUNDERBIRD-312-Y-BLOCK-DUAL-4-BARREL-INTAKE-MANIFOLD-ECG-9424-D-/170764676197?fits=Year:1957|Make:Ford&hash=item27c25e2c65&item=170764676197&pt=Vintage_Car_Truck_Parts_Accessories&vxp=mtr Oldmics
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By easyissy - 12 Years Ago
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Mine has a 1-6 date code on it.
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By Oldmics - 12 Years Ago
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easy The date code on your manifold shows it to be manufactured on a Sunday.All the rest of the dates mentioned were done during a normal Monday thru Friday work week. Would you be good enough to post a picture of that date code casting on your manifold? Oldmics
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By easyissy - 12 Years Ago
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Thanks. It was kinda hard to read and I was'nt sure which way the number's were facing. I guess it could also be 9-1 or 1-5. Like I said it was kinda hard to read. I'll post a pic when I get home from work.
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By yalincoln - 12 Years Ago
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there's a 56 t-bird on ebay with a factory installed 2x4 intake, EDB9425-c, with edb-c carbs. it doesn't show a date code, but very interesting, item #230731704089. notice the s stamped in.
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By Oldmics - 12 Years Ago
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Here’s the updated list for the 34 ECG-D 2X4 intake manifolds that have dates. No November intakes posted yet. 10-15-56 (JH) 12-5 (JH), 12-5 (RH), 12-6 (Marc), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-17 (TD), 12-28 (JH) 1-3 (JH from eBay),1-9 (DK), 1-9 (NoShortcuts), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-26 (Mike), 3-29 (Ted), 3-29 (EP) 5-8 (JH from eBay),5-28-57 (fakirone) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-6-57 (Flatrod), 6-10 (JH) No date (CL),
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By Oldmics - 12 Years Ago
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Oldmics (8/26/2012)
Here’s the updated list for the 34 ECG-D 2X4 intake manifolds that have dates. No November intakes posted yet. 10-15-56 (JH) 12-5 (JH), 12-5 (RH), 12-6 (Marc), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-17 (TD), 12-28 (JH) 1-3 (JH from eBay),1-9 (DK), 1-9 (NoShortcuts), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-18 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-26 (Mike), 3-29 (Ted), 3-29 (EP & JH) 5-8 (JH from eBay),5-28-57 (fakirone) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-6-57 (Flatrod), 6-10 (JH) No date (CL),
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Added 2-18 Spotted it today on an "E" code convertable So now its up to 35 intakes.Also spotted a 3 29 at Carlise today.Its was already on the current list. Oldmics
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By Oldmics - 11 Years Ago
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[quote]Oldmics (10/1/2012)
[quote]Oldmics (8/26/2012)
Here’s the updated list for the 34 ECG-D 2X4 intake manifolds that have dates. No November intakes posted yet. 10-15-56 (JH) 12-5 (JH), 12-5 (RH), 12-6 (Marc), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-17 (TD), 12-28 (JH) 1-3 (JH from eBay),1-9 (DK), 1-9 (NoShortcuts), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-7 (JH from eBay), 2-18 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-26 (Mike), 3-29 (Ted), 3-29 (EP & JH) 5-8 (JH from eBay),5-28-57 (fakirone) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-6-57 (Flatrod), 6-10 (JH) No date (CL),
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Added 2-7 . Spotted it today on eBay So now its up to 36 intakes.
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By Robs36 - 11 Years Ago
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Nice thread! Sorry to be in so late but I have 2 of these intakes and they BOTH have the date 6-11 AND the S stamped.:-)
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By NoShortcuts - 10 Years Ago
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Hmmm...
Current eBay listing, item number 171232339569
Another intake with no production date on top of the thermostat area!
Doesn't appear to have been altered. 
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By slumlord444 - 6 Years Ago
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Ted, my accumulation of 1957 2x4 manifolds are dated 2-18,2-7, 4-1, and one undated but I need to check between the carbs because when I checked the T Bird Club restoration manual they said some were dated there. I also have a '56 intake with no date but also will check between the carbs. Interestingly the '56 manifold is marked ECG9424D rather than EDB9425C although the manual states that most '56 manifolds were so marked.
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By Oldmics2 - 6 Years Ago
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Ted
I have been looking for that style of 56 manifold for a while now. Its only the second one that I have seen with the part# on the topside.Goes to prove that there were two different runs of the 56 manifolds
Like Hooser said most of them are cast with the part# on the bottom. If that manifold is for sale OR if you want to swap me for a bottom cast 56 style manifold - please let me know.
Thanks
Oldmics@Yahoo.com
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By Kahuna - 6 Years Ago
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Is there any performance difference between the 56 & 57 manifolds?
Thanks
Jim
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By slumlord444 - 6 Years Ago
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Prety sure I have one if you are interested.
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By Kahuna - 6 Years Ago
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Hi Slumlord
If you were referring to me re the manifold, I have one, but had no idea if there was a difference.
Now that I know my 57 type makes an additional 50+ Hp, I'm going to use it :-)
Thanks
Jim
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By slumlord444 - 6 Years Ago
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I was refering to Oldcomics2. Unfortunately what I had was not the one he was looking for.
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By slumlord444 - 6 Years Ago
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Got a question while we are discussing manifolds. I have a '56 manifold that has been modified by grinding out the divider so it looks like the kidney shape of the '57 manifold. I've been told that this has been apparently done a lot and signifantly lowers the price on these. How does affect the performance?
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By slumlord444 - 6 Years Ago
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Thanks Ted. There is a definate difference but to me its not enough that you would ever be able to tell in driving the car. Would probably show up on the quarter mile times but again i'm thinking not much. Driver could make more difference than that. I would still got for the stock .57. Not enough difference between the stock '56 to worry abour. The aftermarket manifolds would be an improvement though. I port matched my '57 to the heads but no idea how much if any help it was.
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By DryLakesRacer - 6 Years Ago
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Looks like the two 56 castings are the 2 different ones. Casting # on the top of one and the bottom of the other. The "8" shaped one also is flat where the carbs bolt and the other has indent/open areas between the studs unless one has be trimmed a bit. The 56 did not need an indented valley cover either as I understand it like the stock 57. Did any aftermarket dual quads need one? I love reading and learning about these early factory and aftermarket performance parts.
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By Oldmics - 5 Years Ago
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Would like to add
5-14-57
Spotted at Fall Carlise yesterday
Oldmics (JH)
Also just saw a 4-2 and a 4-9 on ebay on Nov 17th
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By Robs36Ford - 3 Years Ago
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This is not on the list !
1-23
In Alberta, (don't see this in the classifieds here? not a member?)
https://www.kijiji.ca/v-engines-and-engine-parts/strathcona-county/intake-manifold/1541274521
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By yalincoln - 3 Years Ago
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hi ted! i have three intakes! 1 has no date code at all and it doesn't look to be ground off! the other two are- 1-18 and 3-23 they all have the 8 pattern!
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By rpm - Last Year
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4-11
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By Hoosier Hurricane - 13 Years Ago
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Wayne: The 8 holer is a '56 manifold, the other is a '57.
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By Hoosier Hurricane - 6 Years Ago
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Ted, interesting '56 manifold. My '56 manifold has flat carb mounting flanges, no cast depressions as your picture shows. Also, the casting number on mine is on the bottom of the manifold on the water passage part of the casting.
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By charliemccraney - 6 Years Ago
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A little bit, http://www.eatonbalancing.com/2014/01/17/y-block-ford-dual-quad-testing-on-aluminum-heads-part-ii/
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By charliemccraney - 5 Years Ago
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I recently acquired an ECG-D with 1-3
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By charliemccraney - 5 Years Ago
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On the Facebook group, a guy says he has an ECG with 1-15.
On eBay is one from Cliff Murray (CM?) Looks like 1-3 but could be a duplicate. https://www.ebay.com/itm/264399248458?fbclid=IwAR1jrIJbJ6vX1Ey3cx1asg83no299_QDyuIPUmWmJeYHGfElem2Hd2x4oKc
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By Ted - 13 Years Ago
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The ’57 Ford dual quad intakes all have those threaded plugs in the bottom. Those were to facilitate the casting process. While many of the Ford produced aluminum intakes for their various engine families do have those plugs in the bottom, most of the aftermarket intakes do not employ them. These just represent differences in how the manifolds are cast.
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By Ted - 13 Years Ago
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Steve. Thanks for the clarification on the plugs on that other manifold. Sounds like you have two intakes? If so, what are the dates on each of them? Thanks to the information provided by Dennis K., it’s known that the ECG-D manifolds were cast at Schmeller Aluminum Foundry in Cleveland. And it looks like there were around 5500 of these intakes cast. This lead in brings up another topic which would be to identify the various casting dates for some of these manifolds. Most of the ECG-D dual quad manifolds have the date on the top side behind the thermostat. It would be interesting if everyone that has one or more of these intakes post their intake casting dates just to get an idea of the frequency that these intakes were being cast. Here are some dates for ECG-D 2X4 manifolds to get this started: 12-14 1-22 3-29 6-5-57
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By Ted - 13 Years Ago
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Carl. Both the number and location don’t fit what’s found on the run of the mill ’57 dual quad intakes. Got a picture? Due to both the numbering and the ‘one plug on the bottom’, your intake manifold sounds different than the majority which could make it potentially an early production unit.
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By Ted - 13 Years Ago
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Thanks to all for the updates. Here’s the revised list thus far for 22 intake manifolds. Carl’s intake falls outside of the list for now. 10-15-56 (JH) 12-5 (JH), 12-13 (JH), 12-14 (Ted), 12-14 (EP) 1-9 (DK), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-29 (Ted), 3-29 (EP) 4-3 (JH) 6-5-57 (Ted), 6-6-57 (JH), 6-10 (JH)
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By Ted - 13 Years Ago
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Here’s the updated list for the 28 ECG-D 2X4 intake manifolds that have dates. No November or May intakes posted yet. 10-15-56 (JH) 12-5 (JH), 12-6 (Marc), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-17 (TD), 12-28 (JH) 1-9 (DK), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-29 (Ted), 3-29 (EP) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-6-57 (Flatrod), 6-10 (JH)
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By Ted - 13 Years Ago
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Carl sent me pictures of his ECG-D manifold. Although it only had one visible plug in the bottom, the manifold looks like it may have been repaired in the past and that repair did away with one of the plugs. The date code is also not apparent on the top for what could be a variety of reasons. For the time being, Carl’s manifold will simply be listed as having no date.
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By Ted - 13 Years Ago
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It was not uncommon during late Sixties/early Seventies wrecking yard forays to come across two barrel Y’s that had the dual quad recessed valley pans on them. At the time, the significance of those valley pans wasn’t recognized as now it’s apparent that these were likely dual quad engines where the 2X4 setups were removed and simply replaced with intake and carb setups that were easier to maintain. Here’s the updated list for the 30 ECG-D 2X4 intake manifolds that have dates. No November intakes posted yet. 10-15-56 (JH) 12-5 (JH), 12-6 (Marc), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-17 (TD), 12-28 (JH) 1-9 (DK), 1-9 (NoShortcuts), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-29 (Ted), 3-29 (EP) 5-28-57 (fakirone) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-6-57 (Flatrod), 6-10 (JH) No date (CL),
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By Ted - 12 Years Ago
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Tech – factory dual quad intake Here’s the updated list for the 32 ECG-D 2X4 intake manifolds that have dates. No November intakes posted yet. It would appear that there are still ~5,467 dual quad intakes left to document. 10-15-56 (JH) 12-5 (JH), 12-5 (RH), 12-6 (Marc), 12-13 (JH), 12-14 (Ted), 12-14 (EP), 12-17 (TD), 12-28 (JH) 1-9 (DK), 1-9 (NoShortcuts), 1-18 (JH), 1-22 (Ted), 1-22 (Genuinerod) 2-4 (JH), 2-28 (JH), 2-28 (EP) 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (JH), 3-13 (EP), 3-26 (Mike), 3-29 (Ted), 3-29 (EP) 5-28-57 (fakirone) 4-3 (JH) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (JH), 6-6-57 (Flatrod), 6-10 (JH) No date (CL),
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By Ted - 11 Years Ago
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Here’s another updated list. It's now 39 ECG-D 2X4 intake manifolds that do have dates. There are still no November intakes posted yet. It would appear that there are ~5,461 dual quad intakes remaining to document. 10-15-56 (JH) 12-5 (JH & RH), 12-6 (RF & Marc), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-28 (JH) 1-3 (JH from Ebay), 1-9 (DK & NoShortcuts), 1-18 (JH), 1-22 (Genuinerod & Ted) 2-4 (JH), 2-7 (JH from Ebay), 2-18 (JH), 2-28 (EP & JH), 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-26 (Mike), 3-29 (EP & JH & Ted) 4-3 (JH) 5-8 (JH from Ebay), 5-10 (Ebay), 5-28-57 (fakirone) 6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH) No date (CL),
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By Ted - 10 Years Ago
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Here’s an updated list. It's now 41 ECG-D 2X4 intake manifolds that do have dates. There are still no November intakes posted yet. It would appear that there are ~5,459 dual quad intakes remaining to document. . 10-15-56 (JH) . 12-5 (JH & RH), 12-6 (RF & Marc), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-21 (Ted), 12-28 (JH) . 1-3 (JH from Ebay), 1-9 (DK & NoShortcuts), 1-18 (JH), 1-22 (Genuinerod &Ted) . 2-4 (JH), 2-7 (JH from Ebay), 2-18 (JH), 2-28 (EP & JH), . 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-26 (Mike), 3-29 (EP & JH& Ted) . 4-3 (JH) . 5-8 (JH from Ebay), 5-10 (Ebay), 5-28-57 (fakirone) . 6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH), 6-11 (Robs36 &Robs36) . No date (CL),
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By Ted - 6 Years Ago
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Here’s an updated list for casting dates on the 1957 ECG-D 2X4 intake manifolds. The latest addition is a 1-11 intake manifold that came off of an original E Code Thunderbird. The manifold date on that one predates the engine assembly date by about a month. That TBird was sitting out in the open air on an island off the coast of Washington for the last 51 years. There are still no November intakes posted yet.
10-15-56 (JH)
12-5 (JH & RH), 12-6 (RF & Marc), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-21 (Ted), 12-28 (JH)
1-3 (JH from Ebay), 1-9 (DK & NoShortcuts), 1-18 (JH), 1-22 (Genuinerod &Ted)
1-11 (RG)
2-4 (JH), 2-7 (JH from Ebay), 2-18 (JH), 2-28 (EP & JH),
3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-26 (Mike), 3-29 (EP & JH& Ted)
4-3 (JH)
5-8 (JH from Ebay), 5-10 (EBay), 5-28-57 (fakirone)
6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH), 6-11 (Robs36 &Robs36)
No date (CL & EBay)
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By Ted - 6 Years Ago
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Here are pics of the 1956 (top pic) and 1957 (lower pic) manifolds. The most obvious difference is at the carburetor flange. ’56 manifolds have four holes while the ’57 manifolds have the kidney shaped openings.
Here’s an updated list with Slumlords manifolds added to the list. Looks like 49 manifolds not counting the easyissy manifold that the date was unclear on. It’s not on the list yet.
10-15-56 (JH)
12-5 (JH & RH), 12-6 (RF & Marc), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-21 (Ted), 12-28 (JH)
1-3 (JH from Ebay), 1-9 (DK & NoShortcuts), 1-11 (RG), 1-18 (JH), 1-22 (Genuinerod & Ted)
2-4 (JH), 2-7 (JH from Ebay & SL444), 2-18 (JH & SL444), 2-28 (EP & JH),
3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-26 (Mike), 3-29 (EP & JH & Ted)
4-3 (JH), 4-11 (SL444)
5-8 (JH from Ebay), 5-10 (EBay), 5-28-57 (fakirone)
6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH), 6-11 (Robs36 &Robs36)
No date (CL & EBay & SL44)
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By Ted - 6 Years Ago
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slumlord444 (8/12/2018)
Got a question while we are discussing manifolds. I have a '56 manifold that has been modified by grinding out the divider so it looks like the kidney shape of the '57 manifold. I've been told that this has been apparently done a lot and significantly lowers the price on these. How does affect the performance?
Here are pictures of a 1956 EDB manifold modified as you describe. The four independent throttle holes have been converted to the kidney shaped holes as found on the 1957 ECG 2X4 intake manifolds. This modified manifold was dynoed along with the other manifolds on an aluminum headed engine and it was down on power when compared to a stock EDB manifold. Here’s the link again for the dyno test results.
Dual Quad Intake Testing
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By Ted - 6 Years Ago
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DryLakesRacer (8/17/2018)
........The 56 did not need an indented valley cover either as I understand it like the stock 57. Did any aftermarket dual quads need one? I love reading and learning about these early factory and aftermarket performance parts.
Both styles of the ’56 Ford 2X4 EDB-C intakes I’ve had in my hands required a ’depressed’ valley cover to allow the intake to bolt in place without any valley cover clearance issues. On the flip side of this, the 1956 Mercury 2X4 intake does not require a special cover but that intake looks to have come out of the same basic molds as the Edelbrock FM255 intake. The Ford intakes were cast by Schmeller Aluminum and are a completely different design than the Edelbrock intakes. Even the carb spacing is different between the Ford and Mercury 2X4 intakes. To date, I haven't come across any aftermarket or non-Ford dual quad Y intakes that required an indented valley cover to facilitate their installations on the engine.
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By Ted - 5 Years Ago
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Here’s an updated list with Cliff Murray’s manifolds added to the list. It's now 53 manifolds not counting the easyissy manifold that the date was unclear on. That one is not on the list yet. Ebay manifolds do come up but if the dates on those manifolds are already on the following list, they are not listed. If the date is new to the list, they will get listed. Still missing manifolds cast up during November 1956.
10-15-56 (JH)
12-5 (JH & RH), 12-6 (RF & Marc), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-18 (CM), 12-18 (CM), 12-21 (Ted), 12-28 (JH)
1-3 (JH from Ebay, CM), 1-9 (DK & NoShortcuts), 1-11 (RG), 1-16 (CM), 1-18 (JH), 1-22 (Genuinerod & Ted)
2-4 (JH), 2-7 (JH from Ebay & SL444), 2-18 (JH & SL444), 2-28 (EP & JH),
3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-26 (Mike), 3-29 (EP & JH & Ted)
4-3 (JH), 4-11 (SL444)
5-8 (JH from Ebay), 5-10 (EBay, CM), 5-28-57 (fakirone)
6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH), 6-11 (Robs36 &Robs36)
No date (CL & EBay & SL44)
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By Ted - 5 Years Ago
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Charlie’s ‘1-3’ manifold has been added to the list. There’s fifty five manifolds now listed. That’s 1% of the ECG-D manifold production. There were approximately 5500 of those manifolds cast and assuming about 255 casting days in a 12 month production year, that would mean about 21-22 manifolds cast each day not including defects. From the looks of the dates that have been listed, there was only a nine month production window so there would have been a larger number of manifolds produced daily than what I calculated above. There are still no November 1956 manifolds listed yet.
10-15-56 (JH)
12-5 (JH & RH), 12-6 (RF & Marc), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-18 (CM), 12-18 (Cliff), 12-21 (Ted), 12-28 (JH)
1-3 (JH from Ebay & CM & ChMcC), 1-9 (DK & NoShortcuts), 1-11 (RG), 1-16 (CM), 1-18 (JH), 1-22 (Genuinerod & Ted)
2-4 (JH), 2-7 (JH from Ebay & SL444), 2-18 (JH & SL444), 2-28 (EP & JH),
3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-26 (Mike), 3-29 (EP & JH & Ted)
4-3 (JH), 4-11 (SL444)
5-8 (JH from Ebay), 5-10 (EBay & CM), 5-28-57 (fakirone)
6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH), 6-11 (Robs36 & Robs36)
Illegible date (easyissy)
No date (CL & EBay & SL44)
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By Ted - Last Year
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Here’s the updated list for the 1957 ECG-D dual quad intake manifolds. Looks like most months are accounted for except November 1956. It will be interesting to see if there are manifolds dated before or after what’s listed. As it stands right now, production took place from Oct 15, 56 thru Jun 11, 1957. With such a small sampling, the odds are good that the actual production went both earlier and later than this.
10-15-56 (JH)
12-5 (JH & RH), 12-6 (RF & Marc), 12-7 (HAMB), 12-13 (JH), 12-14 (EP & Ted), 12-17 (TD), 12-18 (CM), 12-18 (Cliff), 12-21 (Ted), 12-28 (JH)
1-3 (JH from Ebay & CM & ChMcC), 1-9 (DK & NoShortcuts), 1-11 (RG), 1-15 (Facebook), 1-16 (CM), 1-18 (JH & WH), 1-22 (Genuinerod & Ted), 1-23 (Robs36Ford),
2-4 (JH), 2-7 (JH from Ebay & SL444), 2-18 (JH & SL444), 2-28 (EP & JH),
3-4 (EBay), 3-6 (JH), 3-7 (JH), 3-8 (JH), 3-13 (EP & JH), 3-23 (WH), 3-26 (Mike), 3-29 (EP & JH & Ted)
4-1 (SL444), 4-2 (EBay Nov 2019), 4-3 (JH), 4-9 (EBay Nov 2019), 4-11 (rpm)
5-8 (JH from Ebay), 5-10 (EBay & CM), 5-14-57 (Fall Carlise), 5-28-57 (fakirone)
6-3 (JH), 6-5-57 (Ted), 6-6-57 (Flatrod & JH), 6-10 (JH), 6-11 (Robs36 & Robs36)
Illegible date (easyissy)
No date (CL & EBay & SL44 & WH & Easyissy & RW/Ted)
Totals by month
Oct 56 - 1
Nov 56 - 0
Dec 56 – 13
Jan 57 – 13
Feb 57 – 7
Mar 57 – 11
Apr 57 – 5
May 57 – 5
Jun 57 – 7
Missing and Illegible – 6
New information is always welcome. The best information I have is that there were ~5500 ECG-D 2X4 dual intakes made for the 1957 model year. Some of those were for parts or counter sales so all did not go on factory equipped vehicles. Unless the date on an EBay offering is new to the list, it’s typically not included as some of those manifolds are simply being swapped about which makes duplication on the list far too easy.
[edited to include the intake posted by rpm]
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