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Message: <blockquote data-quote="Rednaxs60" data-source="post: 229224" data-attributes="member: 4617">Slow progress, but getting there.  Timing, always a topic of consideration.  Have marked the crank trigger wheel to use as I would on a car.  Better resolution for timing the engine.  The trigger wheel teeth are 10 degrees each so it's easier to determine the relationship between the tuning software spark table values and where the engine is at.  This picture is with the engine running at approximately 1050 RPM.  #1 TDC is the valley between the white marks.  The case reference point is the screw hole that is being pointed too.  The advance is approximately 15ish degrees.  Changed the trigger angle and spark table values and the timing moved, as it should and the degrees sort of match.  Not a very exact setup right now, but pretty good.  Will fashion a pointer and degree plate using the spare engine:[ATTACH]49663[/ATTACH]Remove and inspect spark plugs after each trial run.  Plugs 1 and 3 are pretty good, not too lean - bordering on a very light tan colour, plugs 2 and 4 are chocolate brown, too rich for the speed but not too bad.  Would like to have all four the same colour.  Think I will go after air leaks first.  The O2 reading bounces a lot.The closer I get to having the FI system sorted out so I can get it out for a road test, the little things are coming to the fore.   Adapting old to new is a challenge.</blockquote>