manifold for the raised block Desoto Hemi

Peter,

Manifold arrived Saturday (EST). Immediately took it down to show my engine builder and various other "HotRodders". Everyone was very impressed with design and workmanship. Can't wait for finished engine. Will report performance specs and data as soon as available. Again, great job. Thanks from all us Desoto guys.

Cheers,
Ward

 

Cheers Ward,
Pleased it arrived safe and sound. Please keep us across the engine build etc would love to see your engine specs, cam etc
Snap a photo with that petrolHead mag and send it down to me, will submit it to the mag. They have a readers contribution section
Regards
Peter

 

I don't know anything about casting stuff, but this is an interesting link:

http://www.sportscarspares.co.uk/castings.html

 

Hi Sorry for the delay, Jimmy made the core of the manifold (have a look at the early photos) and then cast a core box off the core. That allows sand to be compacted into the core box to produce an exact replica of the core. These cores have extensions to pass through the outer size of the manifold. Then material was added to the remaining core and is used to compact sand around. The sand is in two parts in this manifold and the core is placed between the two outer sand moulds.
For a flathead you would make a core box to replicate the water passages and the two parts of the outer head would fit over the core. The water passages through the head would be used to locate the core in the head.
I’m no expert so don’t quote me, the more complex the shape the more complex the pattern.

Cheers

Peter

 

Hi guys,
For those out there chasing the blower manifold here are some initial photos showing the blower location on the manifold. Adding the blow off valve under the centre of the manifold and adding tabs to mount a laser cut alloy plate to mount the blower Let me know what you guys think
Cheers
Peter

 

WWHHOOOAAAHHHHHH Pete !

Now THAT has made my day !! As you know Im after one of these !!

So will you just be welding a 1/2" aluminium plate to the top of the existing dual quad intake with the top removed?

Where exactly is the pop off valve going to go? Will it be the "WEIAND" style ?

Rat

 

It will be a 20 or 25 mm plate machine cut and the manifold will be modified with 8 small ears at the top of the runner to bolt the plate down. The plenum opening and the blower opening is the same size but the blower sits forward of the manifold so there is some overlap.
The blow off valve will be located under the middle of the plenum and in the unlikely event of a backfire will vent under the manifold. It will be on springs and the plate will be O-ringed to ensure it seals. There is about three inches of free space under the manifold so it should not cause a clearance problem. I have been struggling with the ideal location for a blow off valve that can be easily accessed.
What do you think about the snout location?. It will be nice and short.
Cheers
Peter

 

Very short Pete....

I guess there's no way you can move back the blower case without fouling the dist at all?

Cheers

Rat

 

no if it goes back it will mess with the dist. should be no problem with the mount on the manifold

 

PETER, how do i go about ordering a manifold?

 

Hi Dean Just let me know what option you would like and I can take it from thereAt the moment the manifold with shipping is $800.00 USD and you can pay in a couple of ways.
I can provide my bank account details and you can arrange an electronic funds transfer ( preferred method) or you can pay via paypal or a international money order. I have had problems with money orders. Ypu have to get the correct oneI ship via air with NZ post. With insurance and tracking it will arrive within 10 days, most take about 6 days]Let me know if you need any more details
Regards
Peter Williamson
Peter.williamson@telecom.co.nz
The.willies@telecom.co.nz

 

peter, what is the total with all three carb. tops?

 

Dean, Sent you a PM

Cheers

Peter

 

Peter, can you P.M. me the information it takes to do an electronic funds transfer? thanks,Dean.

 

Peter, Can the three two top be prepped for the four bolt carbs? OR can it be left in its blank state so i can prep it any way i choose? THANKS , Dean

 

I am interested in having these built for the 291 Desoto as well. Particularly in form of a 4-71 blower manifold. I realise your mock-up is with a 6-71.

Looks like a very nice unit!

 

Happy to supply the top machined but not drilled to allow you to drill to suit your carbs.

Cheers

Peter

 

Thanks for the feedback. building for the low block will require a start from scratch (almost) would love to give it a try next year but need to give it some thought

Cheers

Peter

 

Peter, will the manifold be blower ready or is that a different breed? Thanks Dean.

 

Good question, IT will be a variation of the same manifold. I have to make provision for the blow off valve and adding some mounting tabs for the blower top plate. We have grabbed the pattern from the foundry and are working on the modifications now. At this point the top plate will be cut from 20mm plate and bolted to the manifold. It will have to withstand the torque and stress of a blower.
All this plus being aesthetically pleasing if it is used without the blower. I am trying to keep the additional bosses to a minim as some manifolds I have seen look like they have bosses for every conceivable possibility and look plain ugly. (my opinion only)
The blow off valve has gone from the front above the thermostat housing to under the plenum to now being on the side of the plenum between the middle runners. Possibility of one on each side. It Will be under the blower plate but will provide easy access for maintenance. I Was concerned about placing it under the plenum and the difficulty of access. Plenty of space under there but who wants to fight with springs and things when you cannot get easy access.

 

Peter, the standard manifold will work for me as it looks real clean the way it is.I hope that when you make the insert for the plenum it will adapt to this manifold .I want the three two manifold top to be machined but not drilled and the other two tops standard .THANKS,Dean.

 

Yeah it’s been causing me some concern trying to keep the manifold looking clean.
As for the divider yes it will be a retro fit. Still waiting for the carbs to arrive so I can arrange testing. Have a design worked out but need to get them running as a base line before we start making bits. A friend picked them up and is bringing them back for me but could be another 6 weeks before I see them. Just sending Strombergs97 a manifold as part payment for the carbs.
He’s been extremely helpful and patient, who would hand over three carbs to a total stranger on the basis a guy on the other side of the world will do the right thing. Thanks for that
As a taste of things to come Ive attached a photo of the rocker covers we are working on. Should have them ready for casting in a few days..
Cheers
Peter

 

Hello Peter..Yes, can't wait to get the intake and build it..with the 3x2 top being able to remove, I'm going to try different sizes of aluminum angle iron in the plenum..Your right, need to find out what will give you the quick acceleration and top end..to much plenum reduces the vacuum and lose some of the velocity to draw the air and fuel into the ports..
I put a picture of a intake that I had built and had the separator in the plenum area on a earlier post..
Thanks
Duane..

 

The picture with the divider is a 4V.. The 3x2 is the same inside the plenum the top was opened up to allow for the 3x2 plate..I had to use 1" spacers to build the linkage. Here is some pictures..The intake is for a 241 Hemi Red Ram..
Duane.

 

Between us we should be able to optimise the performance. I would say you will be able to start on it before I am so I’m keen to see how you go
Cheers
Peter

 

Peter,sent pm let me know if you received it.thanks, Dean Jones

 

Dean PM came through but no message from you. Try again

Cheers

Peter

 

Peter,

Since I already have your manifold......What's the projected cost of valve covers? Might as well have a complete "Williamson" hemi.

Thanks (Cheers),
Ward

 

Hi Ward,

Trying to keep the price competitive with rocker covers available on the market now.
Waiting to get a firm price from the foundry but I know you guy will be happy with the quality.
They are extra high to accommodate adjustable rockers.
The wire covers will be an interesting option (more to come on those)
Cheers
Peter

 

is this the same engine that VINTAGE SPEED makes a 3/2manifold for???? nice job,today i was working on a cut down 2/4 manifold that i am making into 4/2manifold for my boss 429. lot of cutting and welding.....