Re: Redline/Maximum Continuous Operating RPM - Packard 6 Cylinder Engines

Posted by Phil Randolph On 2016/2/23 11:22:47

I wondered about the safe sustained cruising speed myself. After doing piston speed calculations and talking to many folks I decided that 2500 RPM would be my self determined safe sustained RPM.
I also have a 4:36 rear end and 28" dia tires BUT I also have an R11 overdrive. Using a tach and a GPS 2500 RPM gives me 66 MPH. Still in my 38 120 driving at 66 starts to get "interesting" but doable.