I had the gauge on it when checking it out and at idle it was at 17 and slowly revving the motor up some the gauge went up to 24 and then started to drop the higher it went,for the trip I installed a vacumn can and installed another set of valve covers so I could get the PCV to seal up tighter and will see how it does once I get it back on the ground. I think the problem is related to the cam some how.