Safe max RPM for bone stock 5.9 magnum

318willrun said

I shift mine (200,000 miles) at 55-5600 rpm's just because that's where it likes it, but I've had it to 6k multiple times no issues. I wouldn't fret a bit at 6k. That's with a small regrind cam and hughes spring kit. However, the bottom end is untouched

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I don't know if this is of topic or not but I read in my How to build big inch mopars that the oil pick up tube is smaller in diameter were it threads into the oil pump body, is this true and does it cause any oil flow problems to the oil pump? They recommend using a bottom pick up tube