Re: ALTITUDE & COMPRESSION READINGS

Home › Forum › Ask A Member › ALTITUDE & COMPRESSION READINGS › Re: ALTITUDE & COMPRESSION READINGS

December 5, 2015 at 1:34 pm #28086
SCOTT BOGUE
Participant

    US Member

    It’s reasonable to expect lower compression readings, all else being held the same.

    Let’s say you have a 10:1 compression ratio. At sea level, at room temperature, you would expect to see 147 psi on the gauge.

    At 4000 feet the atmospheric pressure would be 12.7 psi at room temperature, so you would expect to see 127 on the gauge.