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04-20-2020, 11:17 AM
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#1 |
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Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
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Cross Sectional cut of iron head thickness.
Looking for a photo and, or measurement of the thickness of a 8BA iron head across the dome portion of the combustion chamber. I'd rather not have to cut one if that info is available elsewhere. Perhaps from a Ford print?
Thank you |
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04-20-2020, 03:24 PM
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#2 |
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Senior Member
Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,524
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Re: Cross Sectional cut of iron head thickness.
A quick sonic test would give you the thickness any good auto machine shop should be able to do that measurement.
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
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04-20-2020, 04:15 PM
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#3 |
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Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,212
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Re: Cross Sectional cut of iron head thickness.
I have a cut through 8ba head on my wall,it came from our dragster, the cast thickness i will measure today,BUT is one of the nicest uniform castings I have seen, about 1/4 -5/16 thick.
Lawrie |
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04-20-2020, 06:47 PM
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#4 |
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Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,212
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Re: Cross Sectional cut of iron head thickness.
The thickness above the combustion chamber is ..250 in and the thickness on the top of the head is .187
This is an 8ba 8rt head Lawrie |
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04-21-2020, 12:07 AM
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#5 |
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Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
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Re: Cross Sectional cut of iron head thickness.
Lawrie, that is perfect! Wonder how much can be taken off the dome area before it blows up?
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04-21-2020, 12:18 AM
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#6 |
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Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,212
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Re: Cross Sectional cut of iron head thickness.
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Lawrie |
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04-21-2020, 08:32 AM
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#7 |
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Senior Member
Join Date: May 2010
Posts: 4,743
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Re: Cross Sectional cut of iron head thickness.
I had flat piston 21 stud heads modified for dome top pistons. You can do it with cast iron heads but not aluminum.
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04-21-2020, 10:12 AM
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#8 | |
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Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
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Re: Cross Sectional cut of iron head thickness.
Quote:
The engine I'm contemplating will have no boost. Do you suppose a stock iron head can survive with 1/16" less thickness over the piston? I'm thinking it will in a street motor. |
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04-21-2020, 10:28 AM
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#9 |
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Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,855
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Re: Cross Sectional cut of iron head thickness.
I'm sure it would be strong enough, but the temperature difference s between the thin and thicker portion of the combustion chamber would be prone to cracking.
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04-21-2020, 09:44 PM
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#10 |
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Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
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Re: Cross Sectional cut of iron head thickness.
Ron
Where would the cold spots be? |
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04-22-2020, 09:23 AM
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#11 |
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Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,855
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Re: Cross Sectional cut of iron head thickness.
I would assume near the water jackets. The head gets hot, the water cools. Especially under hi loading of the engine
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