Does anyone know the radius (or diameter)
of the mounting bolt circle of the magneto field coil?
If possible I would like to know the dimension from the Ford drawing.
I need to layout the hole pattern for a HCCT spark ring.
Thanks for your help.
Magneto Field Coil Dimension
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Topic author - Posts: 628
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- First Name: BOB
- Last Name: CASCISA
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Magneto Field Coil Dimension
Respectfully Submitted,
Be_Zero_Be
I drive a Model T ... Microseconds don't matter
For every Absolute Model T Fact there are at least three exceptions.
Be_Zero_Be
I drive a Model T ... Microseconds don't matter

For every Absolute Model T Fact there are at least three exceptions.
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- First Name: Dan
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Re: Magneto Field Coil Dimension
Check your email. Dan
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Re: Magneto Field Coil Dimension
The holes are on a 4.125 bolt circle.
The two holes closest to the pan rail are 8.156 apart
The two top holes are 3.812 apart
This comes out to approx 8.5 degrees and 62.5 degrees from the pan rail on the 4.125 dia BC.
Almost all ford block and part dimensions are fractional dimensions in my experience.
The two holes closest to the pan rail are 8.156 apart
The two top holes are 3.812 apart
This comes out to approx 8.5 degrees and 62.5 degrees from the pan rail on the 4.125 dia BC.
Almost all ford block and part dimensions are fractional dimensions in my experience.
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Topic author - Posts: 628
- Joined: Sun Jan 06, 2019 12:27 pm
- First Name: BOB
- Last Name: CASCISA
- * REQUIRED* Type and Year of Model Ts owned: 1916 TOURING
- Location: POULSBO, WA
Re: Magneto Field Coil Dimension
Dan & Dan,
Thanks for the information.
I laid it out in CAD and it is right on.
Thanks for the information.
I laid it out in CAD and it is right on.
Respectfully Submitted,
Be_Zero_Be
I drive a Model T ... Microseconds don't matter
For every Absolute Model T Fact there are at least three exceptions.
Be_Zero_Be
I drive a Model T ... Microseconds don't matter

For every Absolute Model T Fact there are at least three exceptions.