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I'be been silently watching thus build David, its been a pleasure to watch this engine come together.It seems as though every IC engine I build, initially, has poor compression. "Running them in" (I mount them to the lathe and spin them over with copious amounts of oil in the cylinder for an hour or so) seems to work wonders. On initial starting I also flood the cylinder with lots of oil. They smoke like crazy, but it helps build up the compression so they will run. After break in they all develop great compression, just takes a while to get there.