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Holt 75 from Germany

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RReid:
Excellent result, Congratulations! :ThumbsUp: :ThumbsUp:

My daughter lives not too far from Stockton, California, which is where the Holt Manufacturing Company was incorporated in 1892. :cheers:

michelko:

--- Quote from: petertha on April 16, 2025, 05:08:26 PM ---A very nice runner, congratulations! Getting better with each refinement.
I noticed in #183 you mentioned ignition problems & the latest video has what looks like a bigger auto? coil. I guess you replaced the Stirling CDI module? Can you elaborate on what kinds of issues you experienced & what you replaced it with. I assume the hall sensor & that aspect remains the same? How are your shop made spark plugs holding up? Maybe I missed but what kind of material did you use for the insulator?

--- End quote ---

Thanks. I had problems with frying the hallsensors. After some tweaking the distance between the sensor and the triggerwhell and also using some hot glue on the sensor it workes now. I still have to try the cdi again. At the moment i run it with a transistor-Type DIY ignition with an automotive coil.
A little big but works. Till now the shop made plugs work fine. Insulator material is CORIAN

michelko:

--- Quote from: gbritnell on April 16, 2025, 07:26:48 PM ---Even though my engine has great compression it still puffs a little oil from the exhaust.  I never played with the oil level. My rods just dip into the oil about 1.5 mm (.060 inch)

--- End quote ---

Did your engine just make some smoke puffs or did it spill out soot? At the end of the video some of the black soot points are vissible on the exhaust.

Chipmaster:
Excellent, sounds great.
Andy

michelko:
so i made some progress on the spilling.
I reduced the oil level so that the crank journal just slightly hit the oil like George mentioned.

Hope this enough lubrication.

Michael

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