383-Magnum or 440-Magnum... Which One Has Higher Redline?

[Fleet 500]

I am curious as to which hi-po Mopar engine has a higher redline. The 383-Magnum or the 440-Magnum. And is there an exact redline?

A Car Life (Feb., 1969) road test of a '69 383 Super Bee listed 110.2 mph @ 5800 rpm. That sounds about right as far as the redline goes.

Car Life (July, 1969) took a '69 Super with 440-6 bbl up to 6,000 rpm.

I have Car Life tests of 440-4 bbl Mopars, but the testers didn't rev them past 5200 and I know they could rev higher than that.

[sleepychallenger]

i think that the 383 can be revved higher because of the stroke

[Bullitt-]

Not exactly on topic but a local Mopar club member is a race engine builder, who's father was into drag racing in the 60's, said that the RPMs are limited on the hydraulic lifter engines due to liter pump up causing what I think is called valve float.  Newer lifter designs have bleed-off to prevent this but back in the day they used to do something to the rocker arms, can't remember exactly what, that helped.

[Chryco Psycho]

the piston speed is slower in the 383 due to the shorter stroke so it could rev higher ,it is still limited by valve spring pressure

[moper]

 

All redlines are theoretical tho. Some will explode lower than that, some will take it and explode at higher or much higher. Technically, redline is when the first part fails...