manifold for the raised block Desoto Hemi

Anybody able to answer this one? I don’t believe they make a 3x2 but being half way around the world I could be wrong. Could have saved me the hassle but wouldn’t have missed the experience for the world
Good luck cutting up that manifold
Cheers
Peter

 

Vintage is working on (their site says "taking orders now") a 4x2 intake for the low deck Desoto as well as tall deck 315 - 325 Dodges. It is a single casting which they can machine for either application. It does NOT have a built in thermostat housing. (As the Dodges didnt have one). A remote housing will have to be plumbed for using on a Desoto.

In theory, this leaves only one engine family left without an intake. The low deck Dodge. I truely doubt anyone will step up to the plate on this one with a very limited market. A set of flanges and an SP2 or P7 intake is about the only route as of now for a single 4bbl.

The best of all choices is an intake such as Pete's (and others) using a common bottom and interchangeable tops. With the addition of the blower top, Peter has the bases pretty well covered.

 

inline with the subject of Desoto manifolds, i have heard that way back a manifold was made with dual bolt holes to fit both Dodge and Desoto. Is that true? If so was it for tall deck or low decks? Also there were some spacers to make a low deck match a tall deck. anyone know?

 

Here are some pictures of Dodge Red Ram Intakes 241, 270, low decks..One is Offy from Hemi Hotheads..The others I had custom built..
Duane..

 

The Vintage intake is cast on that basis. The low deck Desoto and tall deck Dodge are close enough that a single casting can be used. If you check out the Vintage website, you will notice the large casting around the bolt area, making machining for either bolt pattern possible.

 

Hi guys,
Got given a two barrel manifold with the following number on it 1619724. This could be a dodge hemi or a? Anybody go any ideas
Cheers
Peter

 

I cant find that number in my books. Can you post a picture?

Tom

 

Peter, if it's shorter then the Desoto it is most likely a Dodge..
Duane.

 

Hi,

Photos as discussed

Any help appreciated

Cheers

Peter

 

Peter,
It appears to be a Dodge. If the distance between front bolt holes is approximately 8 1/2", it will fit a low deck 241 or 270.
If it measures approximately 10 3/4", it fits a tall deck 315 or 325.
The casting number indicates a 1956 date.

 

I believe that it is for the low deck, I'm not sure if the high where out in 1956..
Duane..

 

Thanks Tom,
Friend of mine was delivering some spare parts to the Chrysler club parts room and in an effort to make some space found it. He grabbed it and poked it in my direction.
Width wise it looks the same as my 330 Desoto manifold going to pull my manifold off and see it if comes close. Would be easier to build a new one with slightly smaller runners but able to take the same top plates.
Don’t know if its worth the effort but I’ll think on it.

Cheers
Peter

 

Well I couldn’t resist putting up a couple more photos of the rocker cover patterns. They are now at the foundry awaiting the first trial casting.
The blower conversion is progressing and will get some photos up as soon as possible.
Cheers
Peter

 

Well guys, The moment of truth, For those hanging out for the blower adaptation to the manifold have a look at the following photos. We have included injection bosses and two support mounts that will have a leg from the top plate to provide extra support.
The pad for the blow off valve is between the runners hardly noticeable.
Let me know what you think as these will become permanent fixtures on the manifolds.
Cheers
Peter

 

First year for the 315 was 1956. 325 debuted in 1957.

 

Pete i like em....

Will you be making them with AND without injector bosses, or only with injector bosses?

PS: Im in for the blower intake !!

Rat

 

if this is the case, it seems it would be possible to use manifold spacers to fit low decks to hi decks, but the Dodge and Desoto have different port spacing???

 

Hi Rat,
At this point they will all be fitted with the injector bosses. Wanted to have three options available but the cost of producing a copy of the complete pattern was prohibitive. With limited numbers being produced /purchased I couldn’t recover the cost
To date I have provided one demo manifold, have one on my motor and have sold 10 manifolds. I have another three ready to sell. The pattern will be back at the foundry next week and we will start the process again.
About 5 people have indicated they want a blower manifold. So development cost v returns is high
Cheers
Peter

 

I agree 39cent,
Yes you could make them fit but the discrepancies in the port alignment could cause flow problems. Could be that the manifold is sufficiently thick around the ports to allow port matching to the appropriate head.
Some enlightened person told me we (Us great unwashed rodders) are only after “looks” and performance is not an issue so port misalignment would not be a problem
Not having the luxury of having one of the dual fit manifolds I would not be able to comment but from comparing two stock manifolds, one I assume is from a Dodge there is some misalignment with the ports.
Please please note: I am not bagging some other production manifold.

Cheers
Peter

 

Well, I received my 3x2 intake from Peter and must say this is really nice work, looks great..
I got Peters permission to post some pictures of the work I needed to do to make the base of a 97 or 94 ventures be clear of any intake obstructions, air/fuel entering the intake. I first used a gasket, then I used bluing and bolted a Stromberg 97 bare base and scribed the ventures. I set it up on my friends BridgePort and machined all the ventures. You can the see the amount we took off. I also needed to do some filing in the plenum area..With this done there is no restrictions for the air/fuel to enter the plenum area..
The 2" angle aluminum can be mounted inside the plenum area, welded or screwed..After talking to several performance people the difference would be minor at low RPMs, no difference at High RPMs.. My choice is not to put the aluminum in due to a couple of reasons, I don't want to get the intake to hot when welding,(have no idea what will happen to the intake flanges or the top flange, warping???), Screws, could come loose and OUCH)..
I believe that this intake will perform "VERY WELL", in a mild street engine. Three Stromberg 97s at a CFM of 150 will work just fine..I would like to build progressive linkage and use the two outside 97s as primaries and the center as a secondary. If I were to use the center 97 as the primary not sure how the engine would like only 150 CFMs, might run lean..I don't know if the Desoto could take all three of the 97s at the same time..I WILL FIND OUT..
I hope this info helps others..
Again, this intake is extreme..Very nice work Peter..
Duane..

 

How about epoxy for the insert? Dean

 

Received my manifold 10/07/08 couldn't be happier:d gentlemen you need to support peter in this project . If you are thinking about getting one of these you won't be disappointed.i'm thinking about getting another one as i hope to have two hemis going at once. I could have two fours on one ,three twos on one, or a single four on one or hmmmmmmm, [you get the picture] way to go peter ! Thanks so much , dean. [now about those valve covers]:d

 

Hello, are you talking about the 2" angle and epoxy it in..Would you explain more..
Duane.

 

Duane, it was just a thought , i don't know if its possible or not. Don't know if the epoxy would hold with the vibrations the engines generate. The most pressure seems like it would be the down force of air during acceleration [maybe]. Dean

 

Well, I couldn't wait till morning so started last night with the linkage..Not a lot of modification to get it too work smooth and kick in the secondaries..Throttle plates on the secondaries catch up (2 to 1) to the primary and open all the way and of course close all the way..
I really enjoy doing this...
Peter, your intake is beautiful and will work very well..
I tried to take some of the roughness off on the underside too see what the finish would look like..That aluminum is hard..
Going to auto supply and get a thermostat housing, looking for a swivel type in case any issures with water hoses..
Duane..

 

Awesome thread for the Desoto Hemis, Thanks for the info and pics.

Bob

 

OK...I'm thinking that 150 CFMs might not be enough fuel until the secondaries kick in????????? I think maybe running them all at the same time..Or outside 97s as primaries and the center as secondary..
OK, need feed back...
Duane..

 

Just to elaborate on the Dodge and Desoto port spacing. The Dodge is approximately 4.2, while the Desoto is approximately 4.3 inches. This means that with a thick enough casting, you could port match pretty easily. Since the intake would already be on the VMC for the correct bolt pattern, its just a matter of programming for some port clean-up.

 

Hi,
A couple of Photos of the first valve covers out of the mould. Don’t have a final price yet as the guy doing the casting costing has gone on holiday for the week.
Got the first blower modified manifold in my hands and going to start machining it this weekend but the way the financial markets are going looks like the demand for manifolds is gone.
You can see the bosses to provided added support the blower and the injector bosses for those asking for them to be fitted.
Going the pickup the top plate today to see how it all comes together
Cheers
Peter