Quote:
Originally Posted by Hit Man X
123psi is optimum? For what?
My near 300000 mile M103 still was in the 160-170psi range.
Try a new tester. Are you sure you are operating it correctly... plugs out, throttle fully open, etc
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Yes I'm sure; I did it how they taught me at school.
AllData stated in the specifications section (for my engine) that the normal compression is 8.5 bar (@~14.5 psi/bar = ~123 psi). Perhaps I miscalculated the conversion from 8.5 bar to psi...