Haven't measured PSI, when I work compression out I use '4-stroke' compression ratio. it is now set for 95oct(RON), highest we can get at our pumps.
Getting the Novi's from Dustin Motzouris, he swears they have great bottom end even on his race ski, I know gas mileage will be a problem but this is a all-out freestyle ski. Allthe Japanese sites are selling DASA or similar 49's, the Novi's are the closest I can get.