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Remade the piston for two rings and a smaller wrist pin.

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Finished piston/rod assembly, but I will replace those weak machine screws for something stronger for final assembly.

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Amazing project especialy done without drawings. I can make precisely nothing without a drawing! Look forward to hearing it run, the noise should be good.
 
Some stuff I do a rough drawing on but nothing like what you are talking about. Things like the crank and cam where it needs to fit I have to draw something out so I know where to stop. Lol
 
Very good looking parts! What is your displacement between cams on camshaft ?
 
You are my hero. I am tempted to upgrade and make your engine.

Aluminium pistons
Please advise material specs?
How do you obtain the tight push fit required for the gudgeon pin and piston?
 
Nice mess-o-parts you have there, now get back to work so we can see it finished! :)
 
You are my hero. I am tempted to upgrade and make your engine.

Aluminium pistons
Please advise material specs?
How do you obtain the tight push fit required for the gudgeon pin and piston?

Material? What I have laying around.. Might be a problem but will tackle that when it becomes one.

Piston 6061, cylinder liner is a piece of pipe from hardware store, Rings will be grey iron, crank 12L14, valves and cam drill rod.

For tight push fit pins I use undersize reamers.
 
So... this is a long time coming. Shelved this project for over a decade.... found it again and started tinkering. Its almost ready to run. Ill update with pics later but here is a quick video. I have a few more shorts showing it and will do a video of final assembly and first fire!

 
Wow Jasen, what a blast from the past.

I remember seeing your screen name in 2011, and vaguely recall reading this thread.

What a nice engine build.

Glad to see you getting back to it.
Very nice machining work !

Pat J
.
 
So... this is a long time coming. Shelved this project for over a decade.... found it again and started tinkering. Its almost ready to run. Ill update with pics later but here is a quick video. I have a few more shorts showing it and will do a video of final assembly and first fire!


Very inspiring, that those old projects are "re-visited" and not lost. Keep pushing it.
 
Just looked thru the whole build thread, looks fantastic. Very nice work. I will watch anxiously to see it running.

With the workmanship displayed I have no doubts it will be a great runner.
 

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