Cylinder inducted reed valve?

So I understand the concept of reed vavles on case inducted engines; when the crank case is under vacuum, air/gas are inducted, and then when full, the reeds close and allow the case to be pressurized, so that the air gas mixture is then injected into the cylinder on the down stroke. More efficient = more power and rpms.

So, is there any argument for reed valves on cylinder inducted motors? I was intrigued by the recent post in Buy/Sell for a franco morini kit that is cylinder inducted and has reed vavles.

Re: Cylinder inducted reed valve?

Re: Cylinder inducted reed valve?

Error.

Re: Cylinder inducted reed valve?

They say if at first,... then give up

"Here": https://www.mopedarmy.com/forums/discuss/2/244707/244707/

Re: Cylinder inducted reed valve?

when the engine is on the decompression stroke it draws the mix down the port into the block, when it bdc's the port/s open and it shoots it into the cylinder... same concept as case inducted... it just comes pulls the mixture in a diff. place.

Re: Cylinder inducted reed valve?

Mike, yes, understood. However, in the cylinder inducted engine, some of the fuel/air mixture is ejected back out of the intake port as the piston begins to move back down from TDC, whereas in a case inducted motor with reed valves, this does not happen, and a higher case pressure can be attained. So would it be beneficial to put reeds on a piston port cylinder?

Re: Cylinder inducted reed valve?

You can make a piston ported cyl into a reed valve cylinder if that is your main question. You wouldn't even have to cut a window in the piston although it would be a benefit. I made one out of a stk puch cylinder. It probably would have been more successful if I hadn't raised the exhaust port a little too much. I haven't completely given up on it

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