I became interested in the Ford engine years back but never really got the bug to make one until after building the Benz engine. The Benz engine has a sliding plate for the intake valve which is rather odd since he used a regular valve for the exhaust. The Ford engine uses plumbing parts that were available at the time for the intake and exhaust valves. A brass check valve for the intake valve and a shut off valve for the exhaust.
I got these at the local hardware store to get started.
![IMG_2308.JPG IMG_2308.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104055-181d6aebc2fdff2ba802f658fd2857f0.jpg)
As far as I can find out the original engine had a compression ratio of 2.2 to 1 which is quite low with a 5" stroke. The original piston was 1 1/2" or 1 1/4" in diameter I am not sure which and around 3 feet in overall length. I would like to stay within a 9" x 15" overall footprint or less than 1/2 size of the original.
I will also be trying for a compression ratio of 4.5 to 1 but there are several problems with that. I will be using a 3" stroke with a 0.875 diameter piston so I need to make the combustion chamber (the 3/4" tee) and the connecting plumbing much smaller in order to raise the compression ratio.
This shows the piston and the seamless cylinder I turned on the lathe. Note the threads are made extra long so the cylinder threads well into the tee and uses up some of the extra room.
![IMG_2311.JPG IMG_2311.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104056-c2a0de97307b3130e784c09c50b209fe.jpg)
The piston travel will be flush with the cylinder end and can just be seen inside the tee.
![IMG_2312.JPG IMG_2312.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104057-49ecb6504d74ccad83d6b27057b5f09a.jpg)
The stand was sealed with an aluminum slug that extends up into the tee to use up some more space.
![IMG_2314.JPG IMG_2314.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104058-f5f9e3dd5762b397c41d4d9f8c615866.jpg)
The rear plug also has an aluminum plug that extends into the combustion chamber to use up even more room.
![IMG_2317.JPG IMG_2317.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104059-39b11749ec1bfab0e283a25f340dd9d2.jpg)
I don't know just how much these changes will make but the combustion chamber is definitely smaller now.
Thanks for looking
Ray
I got these at the local hardware store to get started.
![IMG_2308.JPG IMG_2308.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104055-181d6aebc2fdff2ba802f658fd2857f0.jpg)
As far as I can find out the original engine had a compression ratio of 2.2 to 1 which is quite low with a 5" stroke. The original piston was 1 1/2" or 1 1/4" in diameter I am not sure which and around 3 feet in overall length. I would like to stay within a 9" x 15" overall footprint or less than 1/2 size of the original.
I will also be trying for a compression ratio of 4.5 to 1 but there are several problems with that. I will be using a 3" stroke with a 0.875 diameter piston so I need to make the combustion chamber (the 3/4" tee) and the connecting plumbing much smaller in order to raise the compression ratio.
This shows the piston and the seamless cylinder I turned on the lathe. Note the threads are made extra long so the cylinder threads well into the tee and uses up some of the extra room.
![IMG_2311.JPG IMG_2311.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104056-c2a0de97307b3130e784c09c50b209fe.jpg)
The piston travel will be flush with the cylinder end and can just be seen inside the tee.
![IMG_2312.JPG IMG_2312.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104057-49ecb6504d74ccad83d6b27057b5f09a.jpg)
The stand was sealed with an aluminum slug that extends up into the tee to use up some more space.
![IMG_2314.JPG IMG_2314.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104058-f5f9e3dd5762b397c41d4d9f8c615866.jpg)
The rear plug also has an aluminum plug that extends into the combustion chamber to use up even more room.
![IMG_2317.JPG IMG_2317.JPG](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/104/104059-39b11749ec1bfab0e283a25f340dd9d2.jpg)
I don't know just how much these changes will make but the combustion chamber is definitely smaller now.
Thanks for looking
Ray