Stroking a big block 440/400

[NOSTRT980]

Does stroking a big block over 4.250 limit the rpm range?

 

[benno440]

I am currently at 4.25 stroke and it revs the same as stock, maxed at 6k by the electronic ignition, have hit the limiter many times
would not think it would affect it by much if at all

 

[66Satellite47]

RPM limit is really set by strength of parts - crank, rods, pistons, piston pins, oiling system, valve train. The main reason to stroke is to get more power & torque at lower RPM. RPM kills parts.

 

[inri]

If you read online you will find more often than not that a stroke bigger than 4.250 in a 440 isn't ideal. While it is done and CAN work, most competent engine builders will go no higher due to numerous factors.
Check out Muscle Motors thoughts on this under the stroker section of their website....

 

[NOSTRT980]

Thanks inri will look into muscle mopars.

 

[Budnicks]

cylinder heads, port design, camshaft, even rotating mass, internal parts weights &
especially the valve springs & valve-train pieces, are a big limiting factor to RPM,
the durability issues, especially over 5500rpm &
especially in stock BB engines, stock OEM parts
especially if you don't buy really good forged rods
{racing aluminum rods or H-beam if steel pref.}
light-weight forged racing pistons, lightened crankshaft,
reduced counterweight radius to like 7"-7.125",
lighter the better in many ways,
allows for quicker acceleration & more durability,
less wear & tear, less rotating mass spinning around,
usually helps in results of less parts damage,
BUT only if you still stay with-in the parts ratings,
it's not smart to spin a big stroker crank too the moon, especially if,
you can get most of your power at a much lower RPM,
with good heads, valve-train, camshaft & ignition components,
that take advantage of the larger displacements & massive torque,
with-out spinning it to 8000rpm plus,
unless it's a full on "race engine" professionally built,
& built to do so...

my $0.02 cents