Where have I seen something like this ?

[flywheel1935]

https://www.youtube.com/watch?v=gugIj7TAZ2o

Xmas present here we come !!!!!!

[JoeRowing]

Two of those in a cyclecar please...

[Mike Costigan]

Their V-twin might be more suitable!

[flywheel1935]

My own interest in this engine is the fact that scaled up it looks like a "billet" Austin 7 engine could be built up.
What with modern CAD and 5 axis machine centres a batch could????? be commissioned , something I was considering as a future project.

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Here's one I found earlier

[Nick Salmon]

Love the idea but it seems to run like a pig and then have a component failure. Oh, hang on, I have known Sevens like that...

[Alan]

Flywheel, you could but if going to that trouble why stick at an Austin 7. I’d make it 1100cc for a start

[flywheel1935]

Alan, think the core reason is that just about anything for the engine is available brand new ( at some cost, granted ) bar the crankcase.
Just seen some lovely brand new blocks from https://www.cozetteengineering.co.uk/austin and if/when I win the lottery I would consider one !!!!

[John Cornforth]

Hi

Trying to estimate some figures, if I (generously) assume 50 lbs-ft per litre and 17.5 cc that works out at 0.87 lbs-ft.

If it can manage that torque at 9000 RPM that's 1.5 BHP and 87 BHP per litre.

The makers claim 2.5 PS, but I find that a bit hard to believe for a non-turbo side valve unless it's developed at 15000 RPM or more.

[flywheel1935]

The gist of this thread is to explore the possibility of alternate solutions to the dwindling supply of some parts, and modern manufacturing techniques, such as billet machining, 3 D printing etc could ???? be the solution, discuss.

[Dennis Nicholas]

OR fit a BMC A series.