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Caleb James DeLisle

Caleb James DeLisle

@cjd@pkteerium.xyz remote
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Just realized you could convert a 2 stroke snowmobile engine to not require oil in the fuel.

1. Add a turbocharger so it gets forced induction while running
2. Add a small electric supercharger (e.g. leaf blower fan) for starting
3. Add an oil pump and switch to a drilled crankshaft and pressurized oil bearings

Leave the whole (tuned) intake / exhaust system intact, it needs to be re-tuned a little bit for the turbo, but that's just muffler design.

Would be an efficient way to get a lightweight experimental aircraft engine...

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9
Caleb James DeLisle

Caleb James DeLisle

@cjd@pkteerium.xyz remote
Open link
Normally it's just splash lubrication. Unfortunately 2 strokes have no oil control ring so it will burn oil.

I realized after posting that biggest challenge is the transfer ports which connect the crankcase to the cylinder. Those have to be plugged and re-drilled to connect the cylinder to the (to be designed) intake manifold.
Replying to @cjd@pkteerium.xyz
Replying to @pepsi_man@poa.st
Replying to @cjd@pkteerium.xyz
Replying to @pepsi_man@poa.st
Caleb James DeLisle

Caleb James DeLisle

@cjd@pkteerium.xyz remote
Open link

I think you're trying to make something a problem that isn't a problem. 4 stroke gasoline engines run fine, there's no cylinder lubrication above the piston. 2 stoke diesels run fine even with transfer ports. Mixed fuel in 2 stroke gasoline engines is needed for the bottom end. I don't think there's any evidence that cylinder lubrication suddenly becomes a problem that only diesel can solve just because there are transfer ports.