I am speaking of HPSP. But in either case....
If you DO get more volume, where is it more likely to pool? IF it does pool in the valve cover area, and it does become flooded, where is it going to go in a non breather valve cover? The weakest point I would say. That to me would be the valve cover gasket.
High Volume, Standard pressure.....It would seem to me that you can only push so much oil through a passage at a given pressure, so why more volume at standard pressure? To give the pressure relief valve more of a workout? You can't push more volume without more pressure in the same passage.
You also rementioned "High RPM". Yes, a 283 will wind up really nice and they are sturdy and probably able to withstand more than substantial abuse. But if you are purposefully going to build a high RPM engine, I would think a larger journal would be a much better application, as well as better breathing valve covers, and oil return mods, windage trays, roller cams, etc.
In the end I'm sure that probably in "most" applications it may make no difference whether you place a std or high volume pump. I guess the discussions haven't convinced me of the neccessity of it yet. To me most failure come from over abuse and poor maintenance. Maybe just worn out or the fact that it was home built.
I have credentials for engine building too. I would still look to reference like David Vizard for finality in my questions. I've also read enough of Hotrod Lincoln's posts to listen to him. That doesn't mean I can be stubborn though.
