Piston ring set up, Rings moving after engine run Options

[Chad911sc]

So I’m going to be assembling the 2056 again these next couple of weeks, but wanted to get some feedback on ring set up. I’ve always staggered my compression rings on top of each wrist pin 180• apart from each other. This is how I set it up when I built it. See 1st two pics.
Upon tearing down the engine after approx 3 hrs of run time due to low hot oil pressure, this is what I found. See pics 3-5.
On piston #1 and 2, they were exactly where I placed them when I built the engine. But on cylinder #3, the top compression ring had rotated all the way around almost on top of the compression ring below it! And on piston #4, one of the compression rings had moved into the skirt area.
The interesting thing is on cylinder #3, the one where the compression rings were over each other, I always had a 1.5 lower reading on my vacuum gauge while trying to sync the carbs. Carb throat #1,2,4 would read at say 7 on my snail, and throat #3 would read 5.5.
I guess it’s just luck of the draw where they end up, even if you set them correctly.
I’ve never had one of my engines apart before, until this 914. (IMG:style_emoticons/default/headbang.gif)
All the other engines I’ve built ran great and still are after 25 years on some of them.
I never considered that the rings would move so much around the pistons.

[Ninja]

Rings dance around the pistons normally.

Nothing to worry about.

Valve adjustment is a far bigger contributor for the issues you were having on #3.
Just a couple of thousands difference will effect the compression test and vacuum readings.