What is 16to1 compression ratio converted to psi?

To convert a compression ratio of 16:1 to psi, you need to know the atmospheric pressure, which is approximately 14.7 psi at sea level. The effective cylinder pressure can be estimated by multiplying the atmospheric pressure by the compression ratio: 14.7 psi × 16 = 235.2 psi. Therefore, a 16:1 compression ratio corresponds to an approximate cylinder pressure of 235.2 psi at peak compression.