I'm having an issue with very low oil pressure at idle (like 9psi hot) after installing T&D Rockers. At 3,000 it's up to around 45 and I'm sure there is a ton of oil getting to the head. I am running 440-1 heads that are full time externally oiled. Before the T&D setup I was using the crap Indy Black rockers and tore the bottom out of an intake rocker. But even then idle oil pressure was maybe around 17psi hot. I do not currently use any restrictor in the lines but think this may help. My question is what size restrictor to use, .050 - .045 - .039? Been looking around and don't really see what I need. After shutting off the motor you can actually hear the oil running back into the pan. I found this restrictor from INDY and I'm going to make it myself but I don't see what size orifice they use. Also here's a pic of the Broken Indy Rocker and New T&D Setup.