Intake Manifold....

Discussion of the 331-354-392 HEMIs.

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Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Intake Manifold....

Postby Rob » Mon Jun 20, 2011 10:46 pm

I found this. I know, yall are gonna say it ain't enough, blah blah. LOL But it will be fine for what I wanna do. Plus it solves my water crossover AND thermostat problem all in one. I am workin out a deal on it now. It came off a Power Giant 354 truck engine so it will match up to my heads just right and look nostalgic as all hell doin it.

Image

392heminut
Posts: 488
Joined: Sat Nov 30, 2002 2:16 pm

Re: Intake Manifold....

Postby 392heminut » Tue Jun 21, 2011 10:17 am

Hey Rob, nothing wrong with that! You gotta build it to suit YOU! :wink:
Owner of the Poor Man's Hemi Cuda

George
Posts: 625
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Intake Manifold....

Postby George » Tue Jun 21, 2011 10:50 am

What carbs are those?

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Tue Jun 21, 2011 11:24 am

They are Carter 2421YSA single barrels. Kits for them might be hard to find, but that's ok. I will adapt some more popular carbs if I have to. They have a 1.6875 venturi diameter, so just usin from what I've found regarding venturi size and flow they oughtta be in the 250 CFM each neighborhood. Actually just about right using the carburetor CFM formula. Wish me luck. I am trying to sell off a couple of carburetors to help pay for it.

DavidBraley
Posts: 163
Joined: Sat Jan 30, 2010 7:40 pm
Location: Fort Collins, Colorado

Re: Intake Manifold....

Postby DavidBraley » Tue Jun 21, 2011 6:13 pm

That is great Rob!
Horsepower determines how fast you hit the wall. Torque determines the size of the hole you make. Holzwarth's Law

DHEMI
Posts: 100
Joined: Mon Mar 06, 2006 8:01 am

Re: Intake Manifold....

Postby DHEMI » Tue Jun 21, 2011 7:41 pm

Look's really cool! Ya gonna be o.k. without carb.heat?

mart
Posts: 536
Joined: Tue Mar 22, 2005 2:06 pm

Re: Intake Manifold....

Postby mart » Tue Jun 21, 2011 7:59 pm

Not that they'd improve air flow much (if at all) over the stockers, but '60's, 70's and early-'80's vintage Slant 6 Carter or Ball & Ball 1-bbl carbs will fit that intake too. The only real advantage of switching to those, though, would be possibly to eliminate the governor used on the truck carbs and being able to source carb kits and parts easier and more cheaply.

mart
=================================

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Tue Jun 21, 2011 9:05 pm

I am not familiar with that carb number.....in fact, I think it's a typo. I have several more pics of them and they are very obviously both governor free, so that makes their originality as truck carbs suspect. Not that that really matters and I certainly prefer no governors. He said that he measured the flanges and there's enough room to mod them for Holley 94s. I'm sure I can fab sumthin up if I need to. that's what it's all about, right?

Oh and as for lack of carb heat, YIPPEE!!! I've always hated it. It's not a function of a performance engine IMO at ALL. I live in Georgia, so that's never been a factor. lol

DavidBraley
Posts: 163
Joined: Sat Jan 30, 2010 7:40 pm
Location: Fort Collins, Colorado

Re: Intake Manifold....

Postby DavidBraley » Tue Jun 21, 2011 11:21 pm

I wonder if you could modify that intake to put another carb in the middle? Not that you need it, I'm just thinking out loud....
Horsepower determines how fast you hit the wall. Torque determines the size of the hole you make. Holzwarth's Law

mart
Posts: 536
Joined: Tue Mar 22, 2005 2:06 pm

Re: Intake Manifold....

Postby mart » Wed Jun 22, 2011 3:49 am

DavidBraley wrote:I wonder if you could modify that intake to put another carb in the middle? Not that you need it, I'm just thinking out loud....

----------------------
I think he *needs* it <GRIN>
mart'
=============================

mart
Posts: 536
Joined: Tue Mar 22, 2005 2:06 pm

Re: Intake Manifold....

Postby mart » Wed Jun 22, 2011 4:03 am

Rob wrote:I am not familiar with that carb number.....in fact, I think it's a typo. I have several more pics of them and they are very obviously both governor free, so that makes their originality as truck carbs suspect. Not that that really matters and I certainly prefer no governors. He said that he measured the flanges and there's enough room to mod them for Holley 94s. I'm sure I can fab sumthin up if I need to. that's what it's all about, right?

Oh and as for lack of carb heat, YIPPEE!!! I've always hated it. It's not a function of a performance engine IMO at ALL. I live in Georgia, so that's never been a factor. lol

---------------------------------
That manifold and carb set-up seems a bit unusual. From the pic you posted, it appears to be a truck or industrial manifold, but not having governors, the carbs are wrong. If there's no governors on them, the carbs could be originally from a 331 or 354 Chrysler marine engine and swapped onto that intake by someone because they had them, or to get rid of the governors . By the way - the Chrysler marine intake is different from the truck and industrial intake too. You can tell the marine 2-1bbl. intake from the truck and industrial 2-1bbl intake, because the marine intake is cast in two pieces and bolts together in the middle - while the truck and industrial manifold is cast in one piece. Also, the marine intakes have two flanged water ports, adjacent to the carbs that attach to a remote, cast iron 'marine-style' thermostat housing, via a manifold made of copper tubing - while truck and industrial manifolds uses a conventional automotive-type thermostat and housing. But what throws me off about the set-up in the pic you posted is that all the 2X1bbl. truck and industrial carb and intakes I've ever seen definitely had a provision for carb heat. Maybe somebody else here can shed some light on what this intake is from???

mart
========================

Rob
Posts: 208
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Re: Intake Manifold....

Postby Rob » Wed Jun 22, 2011 6:43 am

The gentleman that has it said "truck, marine or industrial" so I don't think he knows exactly what it came off of. I'm like you. I wouldda thought it wouldda had carb heat. I'm kinda glad it doesnt. lol

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Wed Jun 22, 2011 7:17 am

Here are some more pictures. I don't see a governor anywhere. Course that doesn't mean a thing since I barely know what I'm lookin at. LOL

Image
Image

mart
Posts: 536
Joined: Tue Mar 22, 2005 2:06 pm

Re: Intake Manifold....

Postby mart » Wed Jun 22, 2011 8:19 am

Rob wrote:Here are some more pictures. I don't see a governor anywhere. Course that doesn't mean a thing since I barely know what I'm lookin at. LOL

Image
Image

-----------------
The carbs are probably either from a marine hemi or
possibly from either a flathead 6 or slant-6 from a car or light truck. It's definitely not the marine manifold though because it's a one-piece casting and it has a conventional 'truck and industrial-style' thermostat housing and water passages. I'm just guessing on this, but I'm wondering if the intake might originally be from an industrial engine that was fueled on propane or natural gas? Already being in a gaseous state, propane or natural gas - unlike gasoline - wouldn't have required a heated intake to help vaporize the fuel in cold weather. That could possibly explain the absence of the heat passages in the manifold. I wouldn't have thought though, that Chrysler would have used a different intake casting, just because the additional heat wasn't required.

By the way, if you buy the intake, don't pay a whole lot to get it. There's lots of these old truck-style 2-1bbl. intakes around, cheap, because when guys adapt a truck engine to automotive use, the 2-1bbl intakes are usually the first thing they toss. Because of this, the supply of them, however limited, usually vastly outpaces any demand! for them :).

mart
==============================

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Wed Jun 22, 2011 8:59 am

I am sure you are right about the price. If I could find another one cheaper, I would. He does probably want more for it than it's worth. However, It fits perfectly with my vision of what I want the engine to look like. Plus, it gives me a water crossover and a thermostat housing. Also, it is a factory correct piece. It will bolt on and go, whereas an aftermarket piece would cost more, plus require more spent on modding to make it work for my application. I have been looking for a less expensive one since I found it, but have found none yet. All of the carb size calculators I use say I need around 500 CFM for my engine to turn 6000 RPM max. First off, I don't really see me spinning that engine that high much...if EVER and secondly, I believe those two carburetors will flow close to 500 CFM. They can't be too far off, I wouldn't think. Trust me though, if a better deal comes up, I will take it.

George
Posts: 625
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Intake Manifold....

Postby George » Wed Jun 22, 2011 10:08 am

I had that same truck intake, sold it for $100 some yrs ago. Supposedly used on firetrucks too & firetrucks aren't slow. The carb looks like the one that came with my intake. I think Clifford Performance has 1 to 2 bl adaptors if you go that way. A buddy saw a guy using the 2X1 with 1 bls @ the Nationals in Louisville a few yrs ago.

DHEMI
Posts: 100
Joined: Mon Mar 06, 2006 8:01 am

Re: Intake Manifold....

Postby DHEMI » Wed Jun 22, 2011 10:20 am

Hard to tell,but could it possibly be water heated?

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Wed Jun 22, 2011 11:08 am

mart wrote:
DavidBraley wrote:I wonder if you could modify that intake to put another carb in the middle? Not that you need it, I'm just thinking out loud....

----------------------
I think he *needs* it <GRIN>
mart'
=============================


Hay. All that ain't funny. LOL

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Wed Jun 22, 2011 11:19 am

George wrote:...............firetrucks aren't slow.



A possible theme for the vehicle? Hmmmmm

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Wed Jun 22, 2011 9:14 pm

I found this at Summit. http://www.summitracing.com/parts/TRD-2025/ Two of those and I could stick two Stromberg 97s or Holley 94s on it. That would probably handle anything I would ever put under them. Course, the 1 barrels may. Who knows?

DavidBraley
Posts: 163
Joined: Sat Jan 30, 2010 7:40 pm
Location: Fort Collins, Colorado

Re: Intake Manifold....

Postby DavidBraley » Thu Jun 23, 2011 12:01 am

With those adapters, you could also run a couple of the 2 barrel Rochester carbs.

When did those Rochester 2 barrel carbs start being built? I once owned a 66 Pontiac GTO that had three of them!

EDIT: Found them! "The 2G (later 2GC and 2GV) carburetor, commonly called DualJet, was introduced in 1955, and continued to be used on GM V8s until at least 1969."

http://en.wikipedia.org/wiki/Rochester_Products_Division

:wink:
Horsepower determines how fast you hit the wall. Torque determines the size of the hole you make. Holzwarth's Law

George
Posts: 625
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Intake Manifold....

Postby George » Thu Jun 23, 2011 9:35 am

Rob wrote:I found this at Summit. http://www.summitracing.com/parts/TRD-2025/ Two of those and I could stick two Stromberg 97s or Holley 94s on it. That would probably handle anything I would ever put under them. Course, the 1 barrels may. Who knows?

The 97s would have you @ 300 CFM total & the Holleys not a lot more, less than 400 CFM.

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Thu Jun 23, 2011 11:00 am

George wrote:
Rob wrote:I found this at Summit. http://www.summitracing.com/parts/TRD-2025/ Two of those and I could stick two Stromberg 97s or Holley 94s on it. That would probably handle anything I would ever put under them. Course, the 1 barrels may. Who knows?

The 97s would have you @ 300 CFM total & the Holleys not a lot more, less than 400 CFM.


Then maybe I need one in the middle. LOL If that's all that they flow, then those one barrels have to be even less. Might be best to stick with my original plan for one thermoquad. Won't be as nostalgic, but it would certainly work.

George
Posts: 625
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Intake Manifold....

Postby George » Thu Jun 23, 2011 1:44 pm

Rob wrote:
George wrote:
Rob wrote:I found this at Summit. http://www.summitracing.com/parts/TRD-2025/ Two of those and I could stick two Stromberg 97s or Holley 94s on it. That would probably handle anything I would ever put under them. Course, the 1 barrels may. Who knows?

The 97s would have you @ 300 CFM total & the Holleys not a lot more, less than 400 CFM.


Then maybe I need one in the middle. LOL If that's all that they flow, then those one barrels have to be even less. Might be best to stick with my original plan for one thermoquad. Won't be as nostalgic, but it would certainly work.

Build a plenum box with room for 4 97s & bolt it to the intake!

Rob
Posts: 208
Joined: Thu May 05, 2011 10:15 pm

Re: Intake Manifold....

Postby Rob » Thu Jun 23, 2011 1:58 pm

George wrote:Build a plenum box with room for 4 97s & bolt it to the intake!



Somehow FOUR 97s and "budget" just don't go together George. But you know, anything is possible at this point. I have no deadline.


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