Foamcut,

Very little science was applied to that actually. The local, small engine shop gave me an old chainsaw engine that had reed valve induction. Don't remember the make. I pulled out the reed assembly and got a new rubber bracket, (holds the reeds) and went from there.

The reed assembly is from a 40cc engine so I'm assuming that at least I'll have no restriction on the intake side. Lots of reed volume to pull in the fuel.

The stock Tanaka's latest run using the .108 throttle can be seen here.

http://www.youtube.com/watch?v=z5fK1NWDLS4

Once I get the compression ratio sorted out, I'll be running this one first on glow and then on gas/glow and if it survives all that, on diesel.