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Vietti - One option would be to try a "Tiny Tach" or similar. They use an induction pickup from the spark plug lead (just a couple turns of small gauge wire). I don't recall if 'Tiny Tach' has a single cylinder option or not ... If this is going to be on a hit 'n' miss engine a digital tach...

Very nice engine! It is one of the more challenging "Elmer" designs and yours looks good. I'm sure it will run nicely too.

Simply beautiful ...

Inspiring result Terry. You certainly do have the painting down pat ... on top of all your other capabilities! Charlie

You are a very patient fellow with results to prove it! A lot of hours but you are achieving your expectations and standards.

Yes indeed - they did turn out well. Glad you are happy with the result (we can be our own worse critics).

That is a wonderful setup Luke. Something to be proud of. You certainly have the "casting bug" and turn out high quality work. Charlie

I too have had good success with Brasso as a polish on valve seats. It made a significant difference on both aluminium and steel seats with stainless valves for me ... more than I'd expected. So much so that if I can turn the valve guide and seat in the same setup, a polish with Brasso has...

Another source for more durable .004/5" feeler gauge material is your favourite (aluminium) beverage container. They are very consistent in thickness.

Very thoughtful solution and excellent description using a shutter trigger with a hall effect sensor.

Phenomenal result from very thoughtful setups!

Beautiful work and nice runner! Well done example of an unusual subject. Good on ya for learning all the processes on such a challenging project.

Hi Harvey it sounds like your cam timing is not quite right. When #1 is half way through its power stroke, #2 will be just starting its intake stroke. for what it’s worth I’d suggest starting at the beginning and confirming events one at a time. For example: 1. Focus on #1 cylinder to get valve...

You'll find that Harley Davidson V-Twins have 45 degrees between cylinders. The Howell is a "90 degree twin". If you want to closely compare the Howell design to a motorcycle engine you'll have to look at Ducati, Moto Guzzi, etc. The HD configuration does provide what is considered that...

Harvey - I'll give it a go with the following configuration/starting point/assumptions: 1. Viewing engine from the rear (i.e., the ignition rotor side) 2. Engine rotating clockwise 3. Ignition rotor turning counter-clockwise (2:1 gear driven from crank tailshaft) 4. Ignition rotor fabricated as...

Thanks Peter for sharing your research. It is interesting to see the (apparent) relationship between displacement and valve event timing/duration for the OS engines.

Another overlooked way to cut a (ring) groove is with a saw blade. They come in many and various thickness of numerous tooth counts. An arbour that mounts in the toolpost is straight forward such that the cutting edge can be rotated into position at the correct height. ... or give grinding one a...

Nice little boiler and terrific photos with excellent instruction and advice! You are doing a great job of taking the mystery away.

Beautiful work Edi. Truly showcases the mental processes required to find those parts in the raw material. George - some of the challenges with bonding smooth surfaces using CA might be resolved with an intermediate medium ... e.g., Charlie

Nicely done ... and I like the starting crank (should add one of those to my Upshur T-Head).