What should the compression be on a 5.0L?
What should the compression be on a 5.0L? A good healthy 5.0L sporting about 9:1 compression with a stock cam should have between 140-160psi in every cylinder depnding on the wear on the motor. This problem sounds suspiciously like it is a valve problem. What kind of engine does a Ford Mustang have? Our Number 5 choice is the 250 cu in (4.1L) Ford Thriftmaster inline six cylinder that was available in the 1969 and 1970 Ford Mustang. The 250 was a actually a 200 with a longer stroke, making the engine undersquare (stroke longer then the bore) which may...