Why don't you tell us why your doing this ?
Are you using a lot of oil?
I was adding about .2qt every few day's, the engine ran fine at 21psi. Never did a compression test, I just got tired of adding oil and replaced the short block.
186k, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here