As pointed out above, I never let my engines idle below 850-900. There is just no reason to do it. My engine will easily idle at 750-800 with 255 @ .050 on 340 inches. I make it idle at 900. There is no reason to let them idle slow.
I've seen more smoked pushrods and PR cups, more galled rocker shafts, more junk roller lifters from low idle speeds and low idle oil pressure than I have from anything else.
Also, watched the same stuff when guys think it's a great idea to crank the engine over with the ignition off to build oil pressure. A garanteed parts killing way to do it for sure.
