Cmpressioon PSI in MGF Mpi

Bought a Silverline Compression tester and decided to try it today as it was fine. Now this in on my MPi and the engine was warm and she starts and runs fine however the readings seemed very low with 80PSI being the lowest and 95PSI the highest and that one I cranked her over more than the recommended five times. Doing a quick search on these forums leads me to believe that this tester cannot be reading correctly as with such low readings she would probably not start let alone speed along and be capable of in excess of three figure speeds.



#1 = 95

#2 = 80

#3 = 90

#4 = 80



Your thougths and opinions woud be most appreciated.

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