The Forward Look Network
The Forward Look Network
Search | Statistics | User Listing Forums | Chat | eBay | Calendars | Albums | Skins | Language
You are logged in as a guest. ( logon | register )

Poly want a Dualie?
Jump to page : 1
Now viewing page 1 [50 messages per page]
View previous thread :: View next thread
   Forward Look Technical Discussions -> The Exhaust Pipe - Modification & PerformanceMessage format
 
d500neil
Posted 2007-03-29 6:45 PM (#78642)
Subject: Poly want a Dualie?



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19171
500050005000200020001002525
Location: bishop, ca
...sort of!

I've seen a pic, of a 57 Dodge 325 Poly head engine, with dual Carter carbs/intake installed on it.

Usually, a person will install Hemi heads on a Poly motor (the engine's stamping-number will
give-it-way) , but, I've never previously seen "dual Carters", installed on a DODGE Poly.

So, my question is simply this: will/would a 318 PLYMOUTH dual-carb intake bolt-
up, to 325 Dodge Poly/Hemi cylinder heads?

Probably not, huh?

I do know that the exhaust ports are different, between the Dodge Poly & Hemi heads, but that's not my
question/issue.

I just wonder why dual Carters have not been 'routinely' installed on the Poly heads?

Of course, the dual Carters, installed on the stock Hemi, was no big-deal, because the one-and
only 57 DODGE camshaft was too mild, to take full advantage of all the extra CFM that was dumped
into the motor by the extra 4 barrels.


I'm kinda answering my own question, here.....




Top of the page Bottom of the page
Mike M
Posted 2007-03-29 8:34 PM (#78650 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Extreme Veteran

Posts: 394
100100100252525
Location: Tampa, Florida
dual carter four barrels were routinely installed on poly head 318's it was called the V-800 engine, available on any 1957 Plymouth
Top of the page Bottom of the page
DeSotohead
Posted 2007-03-29 9:21 PM (#78655 - in reply to #78642)
Subject: RE: Poly want a Dualie?



Board Moderator

Posts: 3186
20001000100252525
Location: The not-so-great, dirty-white North ( Michigan)
d500neil - 2007-03-29 6:45 PM


So, my question is simply this: will/would a 318 PLYMOUTH dual-carb intake bolt-
up, to 325 Dodge Poly/Hemi cylinder heads?



Neil....

A Poly "A" engine intake will NOT bolt up to a Dodge poly (or hemi) head.
Physically they are different engines.

BUT, you can bolt the dual 4 Offenhauser (or even the super rare D500-1 Kiekhaufer aluminum intake) to the poly Dodge heads.

SO...you can have a 2x4bbl for a poly Dodge by doing this.

Regarding the cams, the high-deck Dodges all share the same cam blanks, so a hemi grind will fit into the poly engine just fine, as long as lift is not unreal!

And for carbs, you could use the dual 4s off a 318 poly on the Offenhauser manifolds....
Top of the page Bottom of the page
Rodger
Posted 2007-03-29 11:23 PM (#78670 - in reply to #78642)
Subject: Re: Poly want a Dualie?


Expert

Posts: 1506
1000500
Location: Colo Spgs
Hola

When I was 18 1/2 and had not been drafted yet, I went from my just got into apartment which was shouting distance from Clifford Research to Gainesville, Fla in a 1957 Dodge paneled wagon that had twin fours on an "poly". It was an gas hog that ran very good over 35 mph.

Rodger & Gabby
COS

Top of the page Bottom of the page
MorePar
Posted 2007-03-29 11:27 PM (#78671 - in reply to #78670)
Subject: Re: Poly want a Dualie?



50010010010025
Location: Colorado, Pike's Peak

Edelbrock made a dul 4 bbl intake mainfold. I have only ever seen one.

 

Slim 

Top of the page Bottom of the page
d500neil
Posted 2007-03-30 5:41 PM (#78724 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19171
500050005000200020001002525
Location: bishop, ca
Yep, Yep, & YUP: I knew abot the aftermarket 'Edel-boy' manifold; so, the car I saw on someone's webpage musta had THAT
manifold on it; just kinda thought that it was unusual to install dualies on a Poly-head motor (without finding/installing
Hemi heads, too)!

Ply V800 intakes are more-available, so, I wondered if the guy might have had one of them, lying around, & mighta
adapted it, to the Poly block (along with finding some-sort of "second" Carter carb, to install).

The/an amazing thing, about 57 D500 engines is that both single & dual carb versions had the same camshaft.

I had my car's cam be re-ground, so that its idle is now sorta lumpy---guess, in 57, the factory was "going" for
as smooth-and-as-quiet of an operation, as possible----they/it probably figgured that a "performance-minded"
owner knew-enuf to grind the cam, and to install low restriction mufflers, etcetcetc.... LOLOL



Top of the page Bottom of the page
Rodger
Posted 2007-03-30 6:32 PM (#78729 - in reply to #78642)
Subject: Re: Poly want a Dualie?


Expert

Posts: 1506
1000500
Location: Colo Spgs
Hola Gents

In 1957 all the intake manifold makers, made an mainifold for the complete V8 MoPar line, be it twin four, three two's or just an 4 bbl. The De Soto that was sooo quiet and sooo smooth out ran all the other C300's, D-500's or Plymouth's.

Uncle Rodger & Aunt Gabby
COS
Top of the page Bottom of the page
FinFury57
Posted 2007-04-03 12:46 PM (#79039 - in reply to #78729)
Subject: Re: Poly want a Dualie?



Elite Veteran

Posts: 690
500100252525
Location: Kangasala, Finland
here is a picture stolen from swedish for sale ad (1957 Dodge Custom Royal Lancer):

Edited by FinFury57 2007-04-03 12:48 PM




(dcrl2ddt.jpg)



Attachments
----------------
Attachments dcrl2ddt.jpg (57KB - 355 downloads)
Top of the page Bottom of the page
FinFury57
Posted 2007-04-03 4:06 PM (#79049 - in reply to #79039)
Subject: Re: Poly want a Dualie?



Elite Veteran

Posts: 690
500100252525
Location: Kangasala, Finland
Here is one Neil asked me to post:



(50s_4c.jpg)



Attachments
----------------
Attachments 50s_4c.jpg (90KB - 263 downloads)
Top of the page Bottom of the page
d500neil
Posted 2007-04-03 6:40 PM (#79069 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19171
500050005000200020001002525
Location: bishop, ca
Thanks, Jan: so, "which" intakes do we have, in these 2 pics???

Edelbrock Alloy, above, & OEM cast-iron, 'below' ???
Top of the page Bottom of the page
DeSotohead
Posted 2007-04-03 9:42 PM (#79116 - in reply to #79069)
Subject: Re: Poly want a Dualie?



Board Moderator

Posts: 3186
20001000100252525
Location: The not-so-great, dirty-white North ( Michigan)
Neil...

Actually, they both look like an aluminum OFFENHAUSER dual 4bbl intake for Dodge high-decks that I have.
Top one is definitely NOT a Kiekaufer D500-1 unit, as that manifold has the mounting bosses for a driver's side generator mounting bracket.

Bottom photo is hard to tell, but it is definitely a DODGE poly, NOT a Plymouth (look at the water outlets on the fronts of the heads, and the RED filler tube going into the front of the block).

The manifold runner contours look like the Offy intake again, but that is my only visual clue there.....that and the fact that both have exhaust crossovers.....
Top of the page Bottom of the page
d500neil
Posted 2007-04-04 9:42 PM (#79220 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19171
500050005000200020001002525
Location: bishop, ca
Yeah, Hank, AND , that little-matter of the SHAPE/contours of the Dodge rocker-covers !!!

PLY covers weren't "scalloped" , right, but were plain-rectangular?

Ya think that their both ALLOY-intakes, huh???

"Super Red Ram" decals, on the red 'covers', would look neat!



Top of the page Bottom of the page
DeSotohead
Posted 2007-04-05 8:55 AM (#79261 - in reply to #79220)
Subject: Re: Poly want a Dualie?



Board Moderator

Posts: 3186
20001000100252525
Location: The not-so-great, dirty-white North ( Michigan)
The Plymouth Polymotors (Also called Wide-Blocks or Canadian polys) have a ribbed valve cover as well.
BUT, the ribbing is not so nearly pronounced as on the Dodge polys or the Chrysler Spitfire polys.

I think both of these manifolds are aluminum. As to whether Offy or Edelbrock...?????

But I have never seen a dodge 2 x 4bbl intake (Kiekhaufer or aftermarket) that was not aluminum on the Dodges.
The tales goes that Chrysler perfected the art of casting screen doors trying to make the Dodge 2x4bbl intakes in iron.
They turned to Mercury Marine for help, and since Kiekhaufer was already running Mopars in NASCAR, he agreed to make a run of intakes (100 to 150 or so is the estimate).

But Mercury Marine had NO expertise in iron, so aluminum was agreed for the intakes for both the expedience due to timing constraints on the supply as well as the weight savings.

The resulting D500-1 intakes had NO exhaust crossover, as this was a complication to make as well as just not needed for racing.

The Offenhauser intake was created when Chrysler asked them for a manifold for the 1957s (like they did for the 54 Dodge Indy Pace Car engines), and was envisioned to be a part you could purchase through dealers if you wished. But then came the AMA ban on racing, and everything fell apart.
Offenhauser marketed those intakes on their own after that......

I have never seen an Edelbrock Dodge 2 x 4bbl intake, so if anyone has one and wants to send me pictures, PLEASE DO!
Top of the page Bottom of the page
Swept57
Posted 2007-06-27 8:00 PM (#87935 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Expert

Posts: 1611
1000500100
Location: Akron, OH / Maricopa, AZ
The offy manifold is still available new:

http://store.summitracing.com/partdetail.asp?part=OFY%2D3614&view=1...

Dave
Top of the page Bottom of the page
58Donnie
Posted 2007-06-29 10:26 AM (#88059 - in reply to #87935)
Subject: Re: Poly want a Dualie?


Account Suspended

Posts: 2827
200050010010010025
Location: At "The Rock" in upper East Tennessee
This is my plymouth Poly dual 4's I don't know if it helps or not but it might give you something to compare to as far as the differences go.
Clic to enlarge
Click to enlarge.
Click to enlarge.
Click to enlarge.
Top of the page Bottom of the page
d500neil
Posted 2007-06-29 6:17 PM (#88092 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19171
500050005000200020001002525
Location: bishop, ca
The Dodge valve (actually: "rocker", huh?) covers have pronounced scalloping, along their lower end, and the PLY's
have the peaked-reinforcement-detail, in their upper-center areas.

Help me, here, though: I had thought that the PLY's had closure-issues, on the covers, because there were only two hold-down
studs/bolts, on them.

On these two engines, the DOD has two stud/bolts, but Donnie's has THREE of them?

I don't recall reading about closure-issues, with the DOD covers; only on the PLY covers....?



Top of the page Bottom of the page
58Donnie
Posted 2007-06-29 9:53 PM (#88112 - in reply to #88092)
Subject: Re: Poly want a Dualie?


Account Suspended

Posts: 2827
200050010010010025
Location: At "The Rock" in upper East Tennessee
The Plymouth Poly's had three bolts in the valve coves up till around 62 give or take. Thats about all I know for exact differences on this. Anybody else want to chime in here?
Top of the page Bottom of the page
suddenlyits1960
Posted 2007-07-08 12:43 PM (#89032 - in reply to #88112)
Subject: Re: Poly want a Dualie?


Regular

Posts: 68
2525
Location: Southern Pennsylvania
Actually Plymouth only used the 3-bolt covers 56-58, in '59 they went to only 2 bolts. However the casting for the cylinder heads never changed so 3-bolt covers can be used on any A engine. I've never heard of or seen any "closure" issue with the 2 bolt valve covers... as I understand it, Chrysler stopped using the 3-bolt design because the center bolt really wasn't necessary.
Top of the page Bottom of the page
d500neil
Posted 2007-07-12 7:13 PM (#89579 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19171
500050005000200020001002525
Location: bishop, ca
The "story" that I had heard was that the two (probably) closure bolts could warp the fit, of the valve covers, and create oil leaks.

I have no personal experience regarding this myth(?), though.



Top of the page Bottom of the page
big m
Posted 2007-07-13 1:17 PM (#89670 - in reply to #78642)
Subject: Re: Poly want a Dualie?



Expert 5K+

Posts: 7615
50002000500100
Location: Williams California
If the valve cover bolts were tightened to spec, they would not leak, as long as the gaskets were in the proper position. Many times, a backyard mechanic would 'reef' the bolts down when a leak developed, which would misshapen the valve cover, causing future leakage problems. ---John
Top of the page Bottom of the page
mogge65
Posted 2017-12-30 4:46 PM (#555261 - in reply to #79116)
Subject: Re: Poly want a Dualie?



Expert

Posts: 1284
1000100100252525
Location: Nasco , SWEDEN
Desotohead, i know this is a longshot but do you still have that 2x4 intake for Dodge/Desoto 325ci ? Best Regard Morgan
Top of the page Bottom of the page
Jump to page : 1
Now viewing page 1 [50 messages per page]
Jump to forum :
Search this forum
Printer friendly version
E-mail a link to this thread



(Delete all cookies set by this site)