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Early Hemi 4 bolt exhaust manifolds
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jj94tt
Posted 2019-03-06 1:27 PM (#578940)
Subject: Early Hemi 4 bolt exhaust manifolds


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Posts: 18

Anyone have a pair? I believe they are the same L & R, so even if you have a single, let me know... even if they are cracked!

Thanks!
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56D500boy
Posted 2019-03-06 2:56 PM (#578945 - in reply to #578940)
Subject: RE: Early Hemi 4 bolt exhaust manifolds



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jj94tt - 2019-03-06 1:27 PM

Anyone have a pair? I believe they are the same L & R, so even if you have a single, let me know... even if they are cracked!


For which with division hemi? Chyrslers? Desotos? Dodges? They're all different.

Just askin'

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jj94tt
Posted 2019-03-06 3:04 PM (#578947 - in reply to #578945)
Subject: RE: Early Hemi 4 bolt exhaust manifolds


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Posts: 18

56D500boy - 2019-03-06 3:56 PM


For which with division hemi? Chyrslers? Desotos? Dodges? They're all different.

Just askin'

:)


Is this a trick question?! I have not come across mention of 4-bolt flange manifolds for anything but the Chrysler engines... but the application they were mostly used on were Dodge trucks... from what I've read. Did the smaller Hemi's also have bigger manifold applications?

Edited by jj94tt 2019-03-06 3:06 PM
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StillOutThere
Posted 2019-03-06 8:19 PM (#578963 - in reply to #578940)
Subject: Re: Early Hemi 4 bolt exhaust manifolds



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No trick question. All three Hemi sizes for the three divisions offered 4-bolt flange manifolds.

Now, there is the truck type for the '354 and 331. And there is the 392 type for the '57-58 cars (never used on trucks). Which type do you want?

Would the reproduced hot rod type without the choke stove fill your need?
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mstrug
Posted 2019-03-06 10:02 PM (#578970 - in reply to #578940)
Subject: Re: Early Hemi 4 bolt exhaust manifolds



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http://www.forwardlook.net/forums/forums/thread-view.asp?tid=58022&...

''These are heavy duty Dodge truck exhaust manifolds from the '54-56 period and these were cast in '56. Those Dodge trucks had 331 and 354" Hemis. Yes, Carl Kiekhaefer did use these on his race cars. They were not available on production cars any year, any model. Any time a casting or part number has a dash plus another number (typically 1 or 2) that indicates the mold that was employed to make them. This is a quality control in case of future problems. They are absolutely identical left and right (except mold number). Yes, they will bolt onto a 392 but have clearance problem in a torsion bar chassis. ''

''
The 4-bolt truck manifolds were used on the Dodge D-501, but some would argue that that was not a regular production car. I agree that there doesn't seem to be any difference between a -1 and -2, in fact my D-501 engine came with two -2's, both with the same casting date. I have had a number of sets of these. They all had either a -1 or -2 on them, but it is clear that not all the -1 or -2 came from the same mold. Maybe they cast them in pairs and when a mold required replacement, it became the new -1 or -2. I have one manifold with a casting date of 1963 which I thought was pretty late, unless it was strictly a service part.''


Edited by mstrug 2019-03-06 10:05 PM
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jj94tt
Posted 2019-03-07 1:02 AM (#578977 - in reply to #578940)
Subject: Re: Early Hemi 4 bolt exhaust manifolds


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Posts: 18

*edit* Thanks mstrug... didn't see your post until I submitted this one.

I clearly don't know as much about this topic as I thought. I am looking for 4 bolt 2.5" collector manifolds for a 354 Hemi in a 300B. Previously, I was sure that 331, 354, and 392 4 bolt manifolds were all the same, for all model years, and even left and right.

It was my understanding that the 4 bolt manifolds in question (331, 354, 392) were documented to have only been factory fitted to a limited number of 300Cs (according to build documentation)... and even in that case the installation required some grinding. That explains, for one thing, why the new casting that was done in 2008 had to be "revised" to eliminate control arm interference. If this was engineered for the 392 cars, why the interference? To me, this still implies it was the truck casting.

The rumored 355 HP 300B may have had them, if it actually existed. Kiekhaefer's 300s definitely had them fitted after the fact for race purposes. But still, truck castings from what I've read.

I am not going to comment on smaller Dodge or Desoto Hemi engine applications - of which I know nothing about.... but I have not come across any evidence that there are different 4-bolt manifolds for the Chrysler Hemis. If anyone has more information on the topic, please share or point me in the right direction.

Thanks.

Edited by jj94tt 2019-03-07 1:05 AM
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56D500boy
Posted 2019-03-07 1:22 AM (#578978 - in reply to #578977)
Subject: Re: Early Hemi 4 bolt exhaust manifolds



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So like this PN 1536 377? (Same left and right)





Hot Hemi heads repro:



http://www.hothemiheads.com/headers_related/cast-hemi-headers.html

Other 331-354-392 header options at Hot (hemi) heads:

http://www.hothemiheads.com/hotheadspi2.html

REFERENCES:

https://forums.aaca.org/topic/247994-hemi-truck-exhaust-manifold/

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=58022&...

Nothing currently on eBay that I found.

Good luck






Edited by 56D500boy 2019-03-07 1:28 AM
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jj94tt
Posted 2019-03-07 1:43 AM (#578981 - in reply to #578978)
Subject: Re: Early Hemi 4 bolt exhaust manifolds


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Posts: 18

56D500boy - 2019-03-07 2:22 AM

So like this PN 1536 377? (Same left and right)



I think those are the ones.......... I think...
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56D500boy
Posted 2019-03-07 2:56 AM (#578982 - in reply to #578981)
Subject: Re: Early Hemi 4 bolt exhaust manifolds



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jj94tt - 2019-03-07 1:43 AM

56D500boy - 2019-03-07 2:22 AM

So like this PN 1536 377? (Same left and right)



I think those are the ones.......... I think...


I checked the 1955-58 Mopar Parts catalogue for Chrysler 300 exhaust manifolds that were the same, left and right. The 1958 Chrysler 300D with the 392 hemi (internally called the LC3S-300D (where L= 58, C = Chrysler 3 = New Yorker-based, S = sport and 300D = the fourth in the 300 series) seemed to be the only one, i.e. the 1536 377:





Edited by 56D500boy 2019-03-07 10:24 AM




(55-58Chrysler300ModelDesignations.jpg)



(1536377ExhaustManifoldApplications.jpg)



Attachments
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Attachments 55-58Chrysler300ModelDesignations.jpg (154KB - 27 downloads)
Attachments 1536377ExhaustManifoldApplications.jpg (193KB - 29 downloads)
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StillOutThere
Posted 2019-03-07 8:40 AM (#578984 - in reply to #578940)
Subject: Re: Early Hemi 4 bolt exhaust manifolds



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Location: Under the X in Texas
<p>Here is a comparison of the '57-58 392 torsion bar chassis high performance exhaust manifold to the "truck manifold" used on '55-56 race cars.   On the left was standard to the 390 HP (399 code) engines in '57 and to the EFI engines of '58. Also optional for 300D. Note that the choke stove included right manifold is the factory casting. WITHOUT the stove, is the reproduction manifold that I had cast. They all sold out around the world. I have a pair on my 300C Road America competition model (Kiekhaefer car) because when I bought the car one original was missing so I cast off the other.    The original 392 type did have the choke stove but could not be added to the reproduction without further increasing cost and was deemed unnecessary for race applications.</p><p> </p>

Edited by StillOutThere 2019-03-07 8:47 AM




(2008_07270021.JPG)



Attachments
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Attachments 2008_07270021.JPG (30KB - 27 downloads)
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jj94tt
Posted 2019-03-07 9:20 AM (#578985 - in reply to #578984)
Subject: Re: Early Hemi 4 bolt exhaust manifolds


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Posts: 18

StillOutThere - 2019-03-07 9:40 AM

Here is a comparison of the '57-58 392 torsion bar chassis high performance exhaust manifold to the "truck manifold" used on '55-56 race cars.



When I read through your other thread, somehow it left me with the idea that the modification (flattened ram horn) was done only in the modern recast. Reading through it again, I now see what you were saying.

I don't need the 392 car chassis version - which might make my search easier. But not THAT easier.

StillOutThere: Do you know where these had a tendency to crack? I am thinking it might be easier to find a junk set and repair them. Maybe you could circle it on your last photo?

Thanks everyone.
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StillOutThere
Posted 2019-03-07 1:43 PM (#578996 - in reply to #578940)
Subject: Re: Early Hemi 4 bolt exhaust manifolds



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Location: Under the X in Texas
Mostly they broke off the mounting bolt ears through rusty bolts and studs both at the head and pipe flanges but could crack anywhere. On trucks these manifold got GLOWING HOT and WARPED often.
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Powerflite
Posted 2019-03-07 4:19 PM (#579005 - in reply to #578940)
Subject: RE: Early Hemi 4 bolt exhaust manifolds



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I have a couple of cracked manifolds. They seem to crack in the same place if they weren't abused. Once the exhaust loses it's hangars and the truck goes bouncing around as they often did, the weight of the exhaust stresses the exit at the locations that I marked. This is because the casting is weakest here, and is also much hotter than lower down.



(2008_07270021.JPG)



Attachments
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Attachments 2008_07270021.JPG (49KB - 27 downloads)
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