Progress on my new cylinder head

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Model T Ford Forum: Forum 2013: Progress on my new cylinder head
Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, June 26, 2013 - 03:51 pm:


I have adapted a Offenhauser flathead V8 combustion chamber shape. Yes it requires special pistons. I have yet to install the spark plug


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Wednesday, June 26, 2013 - 04:10 pm:

Nice :-) Cast iron?
What type of pistons do you have in mind? Custom made or would 292 Y-block Ford work?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Rob Heyen - Nebraska on Wednesday, June 26, 2013 - 04:12 pm:

Les,
Looks great. Can't wait for it to be finished and tried...
Rob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, June 26, 2013 - 04:21 pm:

Ross custom made pistons. They have a dome the same as late model Ford flathead V8 (6" radius dome). I am trying for a piston to head clearance of .030" to .060" at TDC. The head is cast iron.
Potentially 292 could work, of course without the domed machining (which would have made it all easier).


Top of pagePrevious messageNext messageBottom of page Link to this message  By Richard Wolf on Wednesday, June 26, 2013 - 05:15 pm:

Do those heads have the same bolt pattern?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, June 26, 2013 - 05:48 pm:

Richard
No they don't. Please re read my first posting


Top of pagePrevious messageNext messageBottom of page Link to this message  By Deron Shady on Wednesday, June 26, 2013 - 06:25 pm:

If you can achieve your target piston to head clearance of .030" to .060", what's the compression ration going to end up being?

Inquiring minds want to know!


Top of pagePrevious messageNext messageBottom of page Link to this message  By joe bell on Wednesday, June 26, 2013 - 08:03 pm:

Les,
My thoughts have been to drill for modern plugs so you have the heat range to choose from.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, June 26, 2013 - 08:43 pm:

Deron
I have not measured chamber volume. Probably about 8:1. The evidence is that much higher and you should consider opening up in the flow corner down into the cylinder as you will be pinching off too much and hurting the overall performance. Still lots to learn on this project.

Joe
I agree. I need to check the choices in 14 mm and 10 mm thread size


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