engineerofsorts
Well Known Member
I'm using an Eastern Technology E2M compression tester, on a low time (90 hr) engine.
The readings across all cylinders are consistently 74/80, which seemed a bit low.
I blocked the output end of the spark plug adapter with some firm thumb pressure to simulate "zero leakage" and found the measurement to be 76/80. Am I correct in assuming that 80/80 would be the expected reading with this testing, and thus the gauges are out of calibration by 4 psi? If so, my "corrected" measurement would be 78/80, four psi higher than the 74 that I measured?
I contacted Eastern Technology with this question, but haven't received any reply.
The readings across all cylinders are consistently 74/80, which seemed a bit low.
I blocked the output end of the spark plug adapter with some firm thumb pressure to simulate "zero leakage" and found the measurement to be 76/80. Am I correct in assuming that 80/80 would be the expected reading with this testing, and thus the gauges are out of calibration by 4 psi? If so, my "corrected" measurement would be 78/80, four psi higher than the 74 that I measured?
I contacted Eastern Technology with this question, but haven't received any reply.