I have a 1955 Chevy street/strip car with a Dart shp 427 cu. in. GM SB. It idles at 25 psi oil pressure and goes up to 50 psi when I get to 2500 rpms but goes back down to 25 psi when it gets to 3000 rpm and beyond and stays at 25 psi until I slow down to 2500 rpm at which time it goes back up to 50 psi and stays there. I replaced the high volume oil pump with a standard pump like Dart recommends, I also replaced the pickup and the oil pressure gauge and it still did the same thing. My oil pan doesn't have a windage tray but it doesn't seem that their would be a windage problem when I'm just cruising down the road at 3000 rpm ( 4.11 rear ). Am I wrong?