New owner of a 72 240z coupe. Original engine. This weekend measured compression. Wondering what compression should be for a stock motor. Front to rear: 160# 160# 160# 158# 155# 146#  The difference between 160# and 146# is 8.75%

Read @ajmcforester post below for some good info.

 

46 minutes ago, kenward1000 said:

New owner of a 72 240z coupe. Original engine. 

Have you been driving it or has the car been sitting?  The FSM has specs. and procedure.  The gauge can affect the numbers, but the range variation is what's important.

Been driving the car daily for a month. Forgot about the throttle and choke settings during the test. My throttle was closed and the choke was probably fully engaged. Will try it again, thanks!

 Adjusting the valves may help those readings. 165 and above on all cylinders would be good.

Mark's the Man.  I always forget the simple answers.