Guess I could have gave more detail.
You need to be pushing mid to upper hundreds in microns. Pick up screens are large debris filter screens only. Screw on filters are like 20 microns I think. 500 micron is 0.0196 in thousands. I talk to them and think I got around 750 screen or so. I wanted it to flow and low drag on components. To small is hard on dizzy gears and roll pins. HAHA I personally was not worried about being to big in my drag car, if the engine started to come apart there was bigger problems and the pick up screen was useless anyway. I always cut my wix filters open to see bearing life back then. Mike