340 Static Compression Numbers and Test Procedure

nm9stheham said
I just saw this.... could be an old damper. On pre-70's, the timing marks were over on the right side, and the scribe mark was in an entirely different spot when #1 was at TDC. It was waaaay over to the right (CCW) from the 70 and later marks.

So is you timing 'tab/marks' on the right (passenger) or on the left (driver) side of the car? And where is the scribe mark on your damper when you are approximately at TDC? Give us a scribe mark location in an 'x o'clock' type of way.

Hi its a 1973 block so mark is on the driver side. Timing mark is way way off like 50 degrees haven’t measured. But like its for the other side meaning old unit or slipped. This should be a cast crank so externally balancer is needed and I don’t know if it is. I am going to yank it and get a new one.