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Old 04-09-2020, 01:43 PM   #1
Tod
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Default My first iron OHV casting!

Here is the first iron OHV casting. Still needs cleaned up and final shot blasting. I think it came out very nice for the fist one.


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Old 04-09-2020, 02:27 PM   #2
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Default Re: My first iron OHV casting!

Impressive!
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Old 04-09-2020, 02:34 PM   #3
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Default Re: My first iron OHV casting!

From someone that doesn't know what they are looking at, I think that looks very nice. Where would the spark plug be located in such a head?
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Old 04-09-2020, 02:45 PM   #4
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Default Re: My first iron OHV casting!

Tod, your work never ceases to amaze me!
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Old 04-09-2020, 02:51 PM   #5
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Default Re: My first iron OHV casting!

It looks like both the exhaust and the intake valves are in the head. Is the head based on an existing design or is it a new design?

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Old 04-09-2020, 09:17 PM   #6
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Default Re: My first iron OHV casting!

I'm impressed! Very Nice as always!
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Old 04-10-2020, 01:25 AM   #7
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Default Re: My first iron OHV casting!

I'm curious about the valve stem casting, does having it extend so close to the valve choke the air flow or is it a benefit, on the intake side at least?
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Old 04-10-2020, 07:31 AM   #8
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Default Re: My first iron OHV casting!

Impressive!!!
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Old 04-10-2020, 05:08 PM   #9
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Default Re: My first iron OHV casting!

Quote:
Originally Posted by California Travieso View Post
It looks like both the exhaust and the intake valves are in the head. Is the head based on an existing design or is it a new design?

David Serrano
Itís a copy of my original Scholfield 1930, which I loaned to him for copying. It was after Miller and before Cragar.
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Old 04-10-2020, 06:27 PM   #10
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Default Re: My first iron OHV casting!

Thanks Hardtimes.

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Old 04-11-2020, 08:49 AM   #11
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Default Re: My first iron OHV casting!

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Itís a copy of my original Scholfield 1930, which I loaned to him for copying. It was after Miller and before Cragar.

It's a close copy. I think my ports will flow better than the original. Flow testing will be done asap.


Thanks to hardtimes for sure.



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Old 04-11-2020, 01:17 PM   #12
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Default Re: My first iron OHV casting!

How about looking at putting a quench type combustion chamber in there also while your at it.
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Old 04-12-2020, 01:28 PM   #13
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Default Re: My first iron OHV casting!

Nice work. Your dedication is an inspiration.
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Old 04-12-2020, 03:43 PM   #14
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Default Re: My first iron OHV casting!

You are to be commended, Tod. Thank you.
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Old 04-12-2020, 04:16 PM   #15
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Default Re: My first iron OHV casting!

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How about looking at putting a quench type combustion chamber in there also while your at it.

After testing I will see if it needs it or if we can gain something. Initially, I just wanted to copy what Hardtimes sent.


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Old 04-12-2020, 05:00 PM   #16
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Default Re: My first iron OHV casting!

Yes, great copy. It will be exciting to see how your ports flow and see what comes next.
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Old 04-12-2020, 09:51 PM   #17
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Default Re: My first iron OHV casting!

Tod,
The casting looks really good, post more pics.
Thanks, John
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Old 04-13-2020, 06:39 AM   #18
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Default Re: My first iron OHV casting!

Tod, how do you establish the internal shapes of the water passages?
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Old 04-13-2020, 09:13 AM   #19
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Default Re: My first iron OHV casting!

Tell us about the valve train, is it one you are making, or is it one you are adapting from another motor?
Where are the push rods coming from, made special for this engine or from another motor?
On the spark plug question I assume those will be cut in after the casting, or can't we see them from the angle of the views?
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Old 04-13-2020, 10:47 PM   #20
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Default Re: My first iron OHV casting!

You guys always show me the neatest stuff on this board. Very cool!
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Old 04-14-2020, 11:40 AM   #21
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Default Re: My first iron OHV casting!

Picked up some more cylinder head bullion today. 12 Winfield iron and the first OHV iron sample. They look very nice. Can't wait to machine the OHV. Winfield machining has already run parts.


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Old 04-19-2020, 01:14 PM   #22
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Default Re: My first iron OHV casting!

The rocker cover pattern for these new OHV heads. Finish pass CNC cut yesterday. Next is the inside.


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Old 05-01-2020, 06:26 AM   #23
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Default Re: My first iron OHV casting!

Tod, Gordon Eliot White's Leo Goossen Archives has copies of blue prints for both of the push rod heads, each penned by Goossen when at Miller and then at Schofield. I have those in my files. The Schofield print would permit you to verify exact water passageways/jackets, etc.
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Old 05-02-2020, 07:22 AM   #24
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Default Re: My first iron OHV casting!

Wow the OHV casting looks great very interested to follow your progress
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Old 07-31-2020, 08:19 PM   #25
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Default Re: My first iron OHV casting!

Any updates on the OHV, Tod?
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Old 07-31-2020, 08:35 PM   #26
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Default Re: My first iron OHV casting!

The more I see, the more I like what Tod is doing. I wish I could afford one but it would cost me twice as much as it would you guys.
I am mildly surprised that the combustion chamber is not hemispherical. I'm sure Tod will have considered it but I'd like to hear why he decided against doing it.
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Old 07-31-2020, 08:41 PM   #27
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Default Re: My first iron OHV casting!

any updates on the blocks?
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Old 08-01-2020, 08:24 AM   #28
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Default Re: My first iron OHV casting!

Quote:
Originally Posted by Synchro909 View Post
The more I see, the more I like what Tod is doing. I wish I could afford one but it would cost me twice as much as it would you guys.
Currency conversion is getting better. It'll be cheap when it gets to 2011 rates again.

$US is dropping:
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Old 08-01-2020, 10:43 AM   #29
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Default Re: My first iron OHV casting!

The original Miller/Cragar's required A LOT of spark advance to develope good power, Dodgde's suggestion is very good. Also, the originals used 6 cyl. Buick rocker arms, 1.25:1 ratio. I would recommend 1.5's for several reasons, like, most performance cams are ground for 1.5:1 rockers, and valve lift is very important.
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