Miller head update

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Model T Tom
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Miller head update

Post by Model T Tom » Sat Jun 12, 2021 8:30 am

Moving ahead nicely. We expect to get 6.25 -1
Capture+_2021-06-12-08-24-16.png
Capture+_2021-06-12-08-25-10.png
Capture+_2021-06-12-08-22-59.png

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JTT3
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Re: Miller head update

Post by JTT3 » Sat Jun 12, 2021 8:49 am

Very cool & interesting


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Re: Miller head update

Post by Model T Tom » Sat Jun 12, 2021 10:21 am

They will available in Aluminum and cast iron.


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Re: Miller head update

Post by Jeepbone1 » Sat Jun 12, 2021 10:24 am

Do you have any idea on a price point yet?

Brad


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Re: Miller head update

Post by Dan McEachern » Sat Jun 12, 2021 10:49 am

One of the biggest drawbacks to Model T high performance heads is shrouding around the intake valves. Since this is a new project, it would be nice to see the chamber core have an undercut around the walls adjacent to the intake to reduce this problem.

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Re: Miller head update

Post by AndyClary » Sat Jun 12, 2021 12:24 pm

A little late now, but the Riley head was huge around and over the valves for better flow.

Andy


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Re: Miller head update

Post by Model T Tom » Sun Jun 13, 2021 11:41 am

Up date.
Capture+_2021-06-13-11-39-24.png


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Re: Miller head update

Post by Model T Tom » Wed Jun 16, 2021 7:40 am

Another picture
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Re: Miller head update

Post by dmdeaton » Wed Jun 16, 2021 8:49 am

Tom
How soon till finished product?


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Re: Miller head update

Post by Model T Tom » Wed Jun 16, 2021 10:25 am

Don't know the gentleman making them is busy in his shop. He works on it when he gets time .


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Re: Miller head update

Post by speedytinc » Wed Jun 16, 2021 1:13 pm

I would be interested in an iron unit if you are taking names.
Ill keep an eye out here for your progress.


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Re: Miller head update

Post by Model T Tom » Fri Jun 18, 2021 7:39 pm

Water jacket
Water jacket
Water jacket


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Re: Miller head update

Post by Model T Tom » Mon Jun 21, 2021 5:51 pm

:cry: More progress on head
Capture+_2021-06-21-17-48-01.png


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Re: Miller head update

Post by John bevardos » Mon Jun 21, 2021 7:20 pm

Sign me up !


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Re: Miller head update

Post by Model T Tom » Sat Jun 26, 2021 11:16 am

Almost ready for the first prototype
Capture+_2021-06-26-11-09-38-1.png


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Re: Miller head update

Post by Model T Tom » Sat Jun 26, 2021 11:21 am

Update
Capture+_2021-06-26-11-19-25.png


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Re: Miller head update

Post by Scott_Conger » Sat Jun 26, 2021 11:33 am

I will admit that I was a skeptic in the beginning, but must make amends. Very impressive progress, and kudos for supporting the hobby in this fashion.
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Re: Miller head update

Post by Model T Tom » Sat Jun 26, 2021 11:36 am

Thank you Scott I appreciate that.


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Re: Miller head update

Post by Model T Tom » Sat Jun 26, 2021 11:46 am

I need to get an idea how many might be interested. Helps to proceed


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Re: Miller head update

Post by Model T Tom » Sat Jun 26, 2021 11:54 am

Thinking of making a stock looking low head with same combustion chamber chamber as the Miller. Any interest ?


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Re: Miller head update

Post by speedytinc » Sat Jun 26, 2021 12:20 pm

Model T Tom wrote:
Sat Jun 26, 2021 11:54 am
Thinking of making a stock looking low head with same combustion chamber chamber as the Miller. Any interest ?
Yes. How about a high head? As long as it is iron, not aluminum.


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Re: Miller head update

Post by Model T Tom » Sat Jun 26, 2021 12:36 pm

Not at this time. Plenty of high heads out there. Aiming for something different.

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Re: Miller head update

Post by Bob McDaniel » Sat Jun 26, 2021 1:36 pm

Model T Tom wrote:
Sat Jun 26, 2021 11:54 am
Thinking of making a stock looking low head with same combustion chamber chamber as the Miller. Any interest ?
Interested as long as it looks close to stock on the outside.
Give an old car guy a barn and he won't throw anything away.


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Re: Miller head update

Post by speedytinc » Sat Jun 26, 2021 1:55 pm

Model T Tom wrote:
Sat Jun 26, 2021 12:36 pm
Not at this time. Plenty of high heads out there. Aiming for something different.
Yes, but none in iron. I wont run aluminum. The increased water capacity would be an advantage. You would have the ONLY iron hi head. I would steer all my people to it. Consider it for later runs.
Pruis makes a great hi head in aluminum, but, not iron. You would be the only one on the market.


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Re: Miller head update

Post by Les Schubert » Sat Jun 26, 2021 3:58 pm

John
The first run of Prus heads was in iron. I committed and got one!
At my stage I don’t need any more, but this is a interesting project!


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Re: Miller head update

Post by speedytinc » Sat Jun 26, 2021 4:55 pm

Les Schubert wrote:
Sat Jun 26, 2021 3:58 pm
John
The first run of Prus heads was in iron. I committed and got one!
At my stage I don’t need any more, but this is a interesting project!
I missed that option. I tried to get a Pruis head in iron. He has given that up due to porus casting issues.
I have found a few second hand lizard heads to run. They had porosity issues also, but were repairable/usable.
For future motors, personal & customers, a high iron head would be ideal with this compression ratio/chamber design.
If not available, a low head may have to do. As long as its IRON.


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Re: Miller head update

Post by Kevin Pharis » Sun Jun 27, 2021 12:32 am

Lookin great Tom! Keep up the excellent progress, I hope to see pics of raw castings soon👍


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Re: Miller head update

Post by Les Schubert » Sun Jun 27, 2021 10:26 am

I’ve had better luck getting good iron castings than aluminum ones when I was doing my T block project.


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Re: Miller head update

Post by Model T Tom » Sun Jun 27, 2021 11:13 am

This is a sample the quality heads he produced. Having 1 aluminium and 1 iron head made to test.
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Capture+_2021-06-27-11-05-16-1.png
Capture+_2021-06-27-11-05-31-1.png


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Re: Miller head update

Post by Model T Tom » Mon Jun 28, 2021 12:59 pm

Here is a model A Miller head in iron. Quality work only.
Capture+_2021-06-28-12-55-22-1.png


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Re: Miller head update

Post by Model T Tom » Mon Jun 28, 2021 1:36 pm

Sorry Winfield head

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Re: Miller head update

Post by Hudson29 » Mon Jun 28, 2021 5:07 pm

Model T Tom wrote:
Sat Jun 26, 2021 11:54 am
Thinking of making a stock looking low head with same combustion chamber chamber as the Miller. Any interest ?
I would be interested in a head that looks stock. I have a Z head on one car that works well. The second T could use a bit more pep . . .

paul
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Re: Miller head update

Post by CamMan » Mon Jul 05, 2021 3:28 pm

Tom,
The Prus, Z and reproduction Rajo heads all have 5 to 5.3 compression ratio but claim anywhere from 6 to 8. Determining an accurate number is not rocket science. What is the combustion chamber volume and "true" compression ratio on this Miller head? See http://mtfctulsa.com/Tech/head_design.htm


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Re: Miller head update

Post by Model T Tom » Tue Jul 06, 2021 10:06 am

A test chamber was CNC cut and CC'D to get an accurate ratio.


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Re: Miller head update

Post by Dan McEachern » Tue Jul 06, 2021 12:12 pm

Seems the solid model should have given a pretty exact volume- no need to machine a dummy?? So what is the chamber volume?


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Re: Miller head update

Post by Model T Tom » Tue Jul 06, 2021 1:05 pm

Chamber volume is 180.


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Re: Miller head update

Post by Dan McEachern » Tue Jul 06, 2021 7:17 pm

4" stroke, stock bore and piston volume of 52.25 cc, that comes out pretty close to 6:1


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Re: Miller head update

Post by Model T Tom » Sat Jul 10, 2021 12:39 am

Capture+_2021-07-10-00-33-37-1.png
Almost
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Re: Miller head update

Post by Model T Tom » Tue Jul 13, 2021 6:36 pm

First 2 head's poured today. They will be shaken out tomorrow and we will see what we got.
Capture+_2021-07-13-18-26-24.png

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Re: Miller head update

Post by dykker5502 » Tue Jul 13, 2021 8:09 pm

For that pricerange - I may be interested in one.
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Re: Miller head update

Post by John bevardos » Tue Jul 13, 2021 8:23 pm

Put me on the list


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Re: Miller head update

Post by Model T Tom » Wed Jul 14, 2021 8:40 am

Capture+_2021-07-14-08-27-13-1.png
Nice


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Re: Miller head update

Post by Model T Tom » Wed Jul 14, 2021 11:42 am

One more
Capture+_2021-07-14-11-38-42-1.png


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Re: Miller head update

Post by Model T Tom » Wed Jul 14, 2021 2:46 pm

Better picture
Capture+_2021-07-14-14-44-05-1.png

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Re: Miller head update

Post by Michael Peternell » Wed Jul 14, 2021 8:15 pm

Bottom and top side photos don't seem to match?


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Re: Miller head update

Post by Scott_Conger » Wed Jul 14, 2021 8:54 pm

Michael

I was wondering the same thing and wonder now if it isn't a function of camera angle. As an amature machinist I could see where the gasket side would be molded to a machinable profile with the water jacket being above it and squared off. All views have so little depth of field that within an inch or two the far side is shrunk beyond the line of sight. Look at the underside view and magnify it while looking at the right/forward corner and see if you don't happen to see what appears to be (?) a squared off profile lurking below/beyond the seal surface.

A 3/4 view would be most interesting and at least dispel confusion

At any rate, pretty nice looking castings with an absolute minimum of obvious porosity
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Re: Miller head update

Post by Michael Peternell » Wed Jul 14, 2021 9:31 pm

Scott_Conger wrote:
Wed Jul 14, 2021 8:54 pm
Michael

I was wondering the same thing and wonder now if it isn't a function of camera angle. As an amature machinist I could see where the gasket side would be molded to a machinable profile with the water jacket being above it and squared off. All views have so little depth of field that within an inch or two the far side is shrunk beyond the line of sight. Look at the underside view and magnify it while looking at the right/forward corner and see if you don't happen to see what appears to be (?) a squared off profile lurking below/beyond the seal surface.

A 3/4 view would be most interesting and at least dispel confusion

At any rate, pretty nice looking castings with an absolute minimum of obvious porosity
Just can't be unless there's a flat top hiding the rest? Not trying to be any sort of expert! I'm definitely on the other end that!


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Re: Miller head update

Post by Joe Voller » Wed Jul 14, 2021 9:50 pm

I would be interested in a cast iron head high preferred but would buy a low until the highs come along.


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Re: Miller head update

Post by BHarper » Wed Jul 14, 2021 10:05 pm

Hi Tom,

Wow, that Miller style head is Gorgeous! Bravo!



I would buy one IF it were cast iron. I am not keen for an aluminum head.

Wonderful work and I wish you continued success with this project, Bill


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Re: Miller head update

Post by Model T Tom » Thu Jul 15, 2021 10:28 am

Better pictures
Capture+_2021-07-15-10-24-12-1.png
Capture+_2021-07-15-10-24-26.png


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Re: Miller head update

Post by Scott_Conger » Thu Jul 15, 2021 11:34 am

Thanks Tom

that's exactly what I had imagined was lurking!

that is one beautiful casting
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Re: Miller head update

Post by speedytinc » Thu Jul 15, 2021 11:46 am

Model T Tom wrote:
Wed Jul 14, 2021 11:42 am
One more Capture+_2021-07-14-11-38-42-1.png
Looks like #3 spark plug hole is centered between the valves. The others are over or closer to the intake valves. Why is that? Optical delusion, experiment, special clearance?


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Re: Miller head update

Post by Model T Tom » Thu Jul 15, 2021 1:26 pm

Optical illusion


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Re: Miller head update

Post by Scott_Conger » Thu Jul 15, 2021 2:21 pm

Michael

you a believer yet? :D
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Re: Miller head update

Post by Michael Peternell » Thu Jul 15, 2021 11:19 pm

Scott_Conger wrote:
Thu Jul 15, 2021 2:21 pm
Michael

you a believer yet? :D
Yup! My bad!

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