Browsing through our cousin Columbia's Web site (www.lancair-wannabe.com) I noted their numbers for the TSIO-550-N.  The compression ratio is 8.5:1 and the oil capacity is 8 quarts.  The engine that I ordered from Performance is 7.3:1 and the oil capacity is 12 quarts.  Is that a misprint on Columbia's Web site or is that a typical TCM build?  And what would be the ramification of the lower compression on my engine? Robert M. Simon,  ES-P N301ES

99% done, 150+ hrs to go.