FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
Specs are not usually given on OBs. You want compression numbers to be ever across all cylinders, and at least 100PSI. 15% deviation between cylinders is acceptable.
