Desoto Hemi dual qud intake - dual plane?

Hey Hemi guys.....

Is the factory dual quad intake for a tall deck Desoto a dual plane intake or is it a single plane?

Inquiring minds want to know !!

Thanx in advance,


Rat

 

Anyone?

Bump....

Rat

 

Rat, I can't say definitively, but I distinctly remember Tom Waters saying the regular 4B hi-decks were dual-plane. I just can't imagine that -- as well as the Adventurers ran -- they could be anything else but dual-plan. I know this is speculation, but I saw you didn't get any input today.

 

Thanx 345 - I thought as much.

Given how "flat" the intake is - it must be a pretty restrictive design.....ie low rpm TQ/hi velocity air speed.

Thanx again....

Rat

 

Two on Ebay right now.

 

Rabid Whippet, you have to be KIDING me! Jeez, asleep at the wheel here. And Rat looked a LONG time, too!

We ARE talking DeS hi-deck???

 

Whippet, WOW! Just checked 'em out. If I were to spend over $600, I'd go for an aluminum after-market hi-rise. Who are these guys kidding? They must be looking for restoration candidates? Holy, $600 and (they HOPE) rising??? I don't care. DeSoto shit has gotten out of reach. I am just not gonna chase hi-deck DeS anymore, and I'm going to get rid of the stuff I'd pulled together. F--- it.

 

I can't think of any Chrysler factory dual quad manifolds that are dual plane (except the 426 street hemi), including Dodge and DeSoto hemis, Chrysler 300 (392 hemi and 413 both), 383, 318 poly.

Those are all single plane with a center divider - not the same thing at all.

 

Keep your eyes peeled!! I bought a Desoto low deck 4 barrel for $230 and it was freshly powder coated about a month ago.
I don't really like the look of the aftermarket 4 bbls. I also saw a incredible two one barrel intake for a Desoto that went for $288 with carbs. How cool would this be?.
It was listed as a 1957 Chrysler. I'm pretty sure its a Desoto. Cool none the less.

 

I really don't understand these complaints about price.
A Stromberg 97, and all the rest of this stuff, is not priceless because of how well it works (it doesn't), or how expensive it was when new (it was the cheapest thing you could buy), or how few were made (like a Picasso), but exactly because everyone wants one.
And now everyone is annoyed that it costs more than things everyone does not want.

As long as you select things based on popular choice, your own interest drives the price up.

 

So Panic - they are a single plane design where one bank is seperated from another by a divider?

Have I got that right?

I was supsicious that these intakes were single plane in design just from their relative height from the carb pads to the head faces.

Thanx for the heads up....

Rat

 

Exactly.
2 things give it away:
1. flat (as you said)
2. the height of an adjacent pair (1 & 3, 6 & 8) is the same for a single plane (divided or not), but all dual planes will have them uneven. One bank will always have the outer 2 runners higher than the inner 2, and the opposite bank the outer 2 runners lower than the inner 2 (2 different "H" patterns), except nailhead.

They all have a notch in the divider between the primary barrels for idle quality.
Removing the entire divider isn't possible unless you cut the manifold apart (yes, they do that very cleverly where the rules specify "stock iron manifold").
Typically, the mod is to cut out the web connecting the primary and secondary barrels on each side (not each carb!) to make 2 long quasi-elliptical holes on each side, which improves flow without disturbing response (which goes to hell if you cut the divider out).

 

Great info ...thanx fpr taking the time to put it up !!

What if you mill out the carb pads to expose the plenum....can the diveider then be totally removed assuming a plate was being welded to the intake for a 6-71?

What would the intake's dynamics be like with a 6-71 ie idle, airflow, HP & TQ, rpm range, dynamics regarding air/fuel turning corners etc.....

Im curious as to its suitablilty.....oh, and to piss off the restorers haha

Rat

 

Most 6-71 manifolds I've seen still have some divider at the bottom, but the manifolds converted from divided single plane are (in my opinion) too low, with the discharge "triangle" too close to the front ports (1-4), and not enough volume.
Easily fixed by using a simple box instead of a plate, even an extra 1" will help.

 

More? Read my article: http://victorylibrary.com/mopar/blower-GMC.htm

 

Sold one on e-bay last July for a few cents under $700. The guy was restoring a '56 and was willing to pay that much. They are not a performance manifold in today's terms and use small base WCFB carbs. Nice for a nostalgia look but if you want power a simple modern aluminum single 4 bbl. manifold will do much better.

 

RAT - You'd be better off trying to snag a dual plane 2X2 aluminum intake, and using a plate on that. Not only is it a dual plane, it's also about 500lbs lighter...and the distribution is better. OR wait for 38moparfan to come out with his blower intake or use his dual plane 2X4 intake and a plate. The 57 cast iron intake weighs a TON...

 

JIMI'sHEMI - You can now buy a BEAUTIFULLY engineered (38Moparfan's product), brand new, aluminum, dual plane, single 4, high rise intake for $495 from Hot Heads. You can't beat that with a stick...

 

Thanks, 345. I was just feeling frustrated last night when I posted. I've got my cool -- and patience -- back together now. It's just that -- boy! -- I never imagined the hi-deck DeSotos to be so much trouble to find parts for. Yep, I'll keep my eyes open & keep on keepin' on!

 

I thought 38Moparfan was selling direct to the Hamb, is this incorrect?

.

 

73RR - I don't know if he is, but I found that one the other day...

 

That manifold hot heads are selling for $495-00 doesnt look like Pete's (38moparfan). It marked vintage V8.com. He's a good mate of mine so I will ask him to clarify things.

 

Gave him a call and no the manifold at Hot Heads is not Pete's.

 

Hi Guys,
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That low deck Desoto single four manifold is not the one I build and sell. I am building a low deck manifold based on the same design as the high deck version I sell and it will be available in the New Year.
<o> </o>
I sell my manifolds on eBay and directly through contacts from the HAMB. I try to keep up with demand but currently have a couple of guys waiting so out to the workshop to start work now.
<o> </o>
Cheers
<o> </o>
Peter

 

The 2x1 intake shown below is a Chrysler 331/354 truck intake. I believe casting number is 1406828.

 

Keep in mind that if you are converting a cast iron intake for use with a blower that the base of your adapter plate will need to be milled approximately 5 degrees different than the top surface so that the blower sits perpendicular to the crankshaft. ( The crankshaft and blower snout being parallel)
Most, if not all cast iron intakes have the carb bases at a 5 degree angle from the head flange surface.

 

Or, since it's never going to be used for carburetors again, you can get rid of the angle this way...

 

38 MOPAR FAN - Sorry...I didn't realize somebody other than yourself was making intakes for the DeSotos. Strike 2 for me...

 

The low deck Desoto intake that Hot Heads sells is a product of Mr. Bill Mewhinney.

 

Guys I already have Pete's/38 Moparfan's aluminium blower intake...a beautiful piece of work if I ever saw one hehe.

Well done Pete.

I as just askin the qun on the Desoto dual quad intake out of curiosity to find out if it was a SP or DP intake.

Tom, I'll be in touch wit you in the New tear re those parts Im after....

Thanx to all who posted....

Rat