Irving Vincent Four Valve Engine

[davidd]

Irving Vincent four valve head photos:

David

 

[vibrac]

Now compare that to the pictures on the other sidecar thread Tommos engine is from the original drawings by Phil Irving I think the Australian version has a little more 'input' (like most Vincents after 70 years)

 

[bmetcalf]

The valves must have short little stems.

 

[A-BCD]

 

[Bazlerker]

Has the issue of valve seat retention in the head been solved?

 

[davidd]

Has the issue of valve seat retention in the head been solved?

I think the have. I do not know for a fact, but the seats were an issue very early on and I do not think they would take it to a race if they had not come up with a solution. I would love to know what it was.

 

[A-BCD]

The crank looks interesting - presumably before balancing.............

 

[bmetcalf]

Piston moulds in the background? Easy to see where the ring grooves will be.

 

[davidd]

The cranks start out fairly well balanced:

The UFM:

David

 

[Simon Dinsdale]

That's a lot of swarf that would have been generated to machine a complete crank from solid. Wow!!!