| Gallery, Projects and General > Project Logs |
| V-twin engine from scratch - yet another interpretation of how (not) to build a |
| << < (18/27) > >> |
| madjackghengis:
Hi Sorveltaja, not to disparage your pietzo ignition, which I'd like to see work for you, v-twins generally only use one set of points, a coil with both ends of the secondary available, and two lobes on the cam, firing both plugs at every point opening, the "waste" spark occuring during the exhaust cycle of the off cylinder. Harley's did run dual points for about three years, but they were a constant adjustment issue, and went away, going back to the old way. Have you used piezo ignition before and had success? I've long considered it, but never got around to trying it out. I'm interested to see how it turns out. :bugeye: mad jack |
| sorveltaja:
Mad jack, In fact I have tried piezo ignition before, but with that engine, it was too much strain. Seriously taken, I don't expect too much success for using the piezo ignition. One reason being, that it needs to make a one waste spark on every revolution. Other is, that can it keep up with the speed. But who knows, testing might give surprising results sometimes :thumbup:. Plan B is, that I have a traditional breaker set to replace the piezo, if it doesn't work. I just had to make some harvesting on the net, to find more information :smart:. New thing to me is, that v-twins doesn't fire at the same cycle :zap:. So there is no need for two sets of breakers, or 2:1 reducing gears. Who ever tries to build an engine, without knowing its principal functions? That's me. It's just the way I learn things... |
| sorveltaja:
I have made some attempts to make a fastening part for piezo unit, but it isn't as simple as I thought. It needs to be made of non-conductive material. I have some round nylon bar, but it really needs extremely sharp tools. Turning went ok, but milling it is pain in the a$$ with used milling bits. So any precision is hard(impossible) to achieve. Enough mumbling, here is the basic construction, that I'm after: Green part is the piezo with roller, red ones are ball bearings, and blue is timing cam for piezo. An upside down U-part is in theory the part, that keeps whole thing together. |
| sorveltaja:
I think I'll skip that piezo ignition for now, as it's bit difficult to fit it, on the way that was planned. It needs some troubleshooting, and more testing, that would be a project on its own. I might get back to it though. Next thing to do, is to fit an ordinary breaker points set. Should be a lot easier thing to do :dremel:. Also they are known to work, as they did on the test engine. |
| sorveltaja:
Breakers set fitting in progress: I left some extra material for that steel plate, so that a adjusting lever can be added, if needed. It still needs a fastening system, as it rotates quite freely at the moment. The cam on the above pics is to be replaced, with more properly shaped one. |
| Navigation |
| Message Index |
| Next page |
| Previous page |