So right John I don't want anything to do with the drip carb and the CDI ignition is so cheap and reliable.
Ray
Ray
Probably issues with the swing valve seat. Even after improving the intake valve spring, I was having leakage so I marked the seat and valve with Prussian blue and improved the seal with some careful sanding and polishing.I had always been suspect of the exhaust valve setup that I originally made for the engine. I had a great deal of trouble getting the valve stem hole exactly in line with the valve seat. It looks like it would be a simple thing to do with the six sides flanges on each end of the housing but those flats don't line up with the internal seat or even with each other. So i tried drilling through the valve stem but the inside of the stem is not at 90 degrees to the internal seat.
So this is what I did.
View attachment 150676
I drilled a large hole through the seat and through the bottom of the valve. I turned a brass slug to be pressed into this hole and cut a valve seat into the end of it. Now the valve seat and the center hole for a new valve are in line with each other. I drilled four holes in the slug to let the exhaust gasses exit and this is how it turned out.
View attachment 150677
This was a great improvement and I had several short runs but I noticed that when the engine fired there was a puff out the carb. That needs to be addressed so now I will work on the intake valve design.
Thanks for looking
Ray
This is what I have been working toward.
Not completely done yet as I will make a box for the electronics to fit in and do a little more tuning.
Thanks for looking
Ray
Once again, nicely done Ray! Clean AND a runner, can’t beat that.Thanks John and Minh.
Final picture with the electronics box. The on/off switch is on the other side.
View attachment 150794
I want to thank everyone who left comments and likes along the way it is appreciated.
Thanks for looking
Ray
Nice setting !Final picture with the electronics box. The on/off switch is on the other side.
View attachment 150794
Thanks for looking
Ray
Minh I don't know whats next but I will think of something.
Ray I have thought that a model of a diesel pile driver would be interestingMinh I don't know whats next but I will think of something.
Ray
Maybe ......flame eater or stirling or steam engine !?!?Minh I don't know whats next but I will think of something.
Ray
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