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95 MPH for the gas guys from Michigan. Anyone have any other news on Huntsville?

I did read the webpage, before I included a link to it. I was respectful of their statement and did not copy their web page, I only provided a link to others in this community to go too and read for their personal benefit. I guess I will go crawl back under the rock I came from.

Brad, It might be a good idea, but not too sure about my ambitions to build another 54 crankshafts. The trial and error method will kill me, so I'll keep searching. While it may and I underscore the word may not be technically achievable to balance a single cylinder engine, I still believe...

Our 25.7 cc engine is between 7 and 8 bmep. check this out for an explanation of bmep. BMEP Explanation

Brad, I think Dave was referring to the fact that the formula you used doesn't add back the bottom have of the rod to 55 or 60% of the top half of the rod and piston, pin and clips for the target weight for the bob weight. Atleast that is the only difference I see between the two formula's...

Lets use 0 degrees for the crankpin for the purposes of this discussion. If you have an equal mass at 0 degrees and 180 degrees (using whatever method of balancing [let say 55 or 60%]) and then you have a different mass at 90 and 270 due to the design of the crank (and most cranks are like...

This doesn't address side to side balance. And while it may work very well for 15cc and smaller engines, it does not work on our 25.7cc gas engine. We have actually tried this method. I believe that was our version 3 crank, currently I'm on version 19 and counting.

I have posted a couple of times on rcboat.com on this subject.

I would be interested to hear what fellow engine nuts think or know about balancing a single cylinder engine. Anyone work with balancing a crank both in the up and down stroke, but also side to side. Maybe a dampener, maybe harmonics. Let the ideas begin.

Taylor, Maybe there is a good driver in the Roodvoets family after all. Kurt

Ken, Is that a dream or a reality?

Should help with launch, but after you are up on plane the waterline should be below hub of prop. One thing to consider is rough water, might disturb water in front of the prop from bouncing. We have had that problem with a center sponson before.

What time Saturday? Just a suggestion, 9:30am. Anytime good for me. Just need to find a time suitable to all that want to attend.

Does anyone know the standard ignition map for the zehoah ignition system. I believe it starts at 20 degrees advance and then starts a linear retardation, but not sure where it goes exactly.

Thanks, I have two on the way.

I was looking for a perry pump to try with our motor, but all of the one I found were for alcohol based fuels. I am assumming these will not work for gas. Any suggestions Lohring?

1/4" - 32TPI for a standard glow plug.

Scott, The only conversations I have had are on this thread.

Lohring, Do you know how many degrees the timing is advanced? We have tried to advance timing by 5 degrees and the engine does not like it at all.

Wade, If you are attending next Saturday, Please bring info on the sites you know about. We can get an arial view online if you have an address.