Maximum RPM for 273 64 Dart

clifftt said
273: Cool chart! Factory rated was 230 for a stock Commando as I recall, you're just passed that. You dyno'd a stock motor to get these numbers?

If you like that one here's a dyno of an engine masters competition 273 making 473 hp @ 7900 rpm. Done by some of the members think Hemirunner/IQ52.

If I remember right it's sleeved and bored to 3.75, ported indy x heads and 250 ish cam.