I recieved the Frank Bowman ring today, and got a chance to test the first engine. Power increased by quite a bit. I was getting a good 7700 rpm with the apc 16-6. I know the ring is still seating, so I didnt really go all out. I would like to increase the duration of the intake, but am afraid of ruining this engine. I guess I could assemble one of the other engines, and try out a few mods. I blueprinted my stihl 25cc the other night, and the exhaust on this engine is about the same as the stihl. The intake is about 10 degrees less duration than the stihl, so I kinda want to change it so that it matches the stihl. Then I will test it, and if I feel it needs more power, then I will look at the transfer ports. I also need that velocity stack, cause there is a bit of fuel spraying out the carb. I think I will make an "el-cheapo" one tomorrow.
I have a small video that im uploading, and will post as soon as its on youtube.