Off line response, was: 413 vs 440!

["Mike & Christine Trettin" <mtrettin@xxxxxxxxxxxxxxx>]

> The difference in displacement between the 413 and the 440 is due entirely
> >to a bore change, they are both 3.75" stroke engines, thus the low speed
> >torque is probably not much affected by the displacement change as it
would
> >be if it were due to a longer stroke in the larger engine.
> Dick, very often people claim that a longer stroke will give you more off
> line torque.  I am not sure if this is directly true.  A longer stroke
> engine will usually have smaller intake ports and valves than a short
> stroke engine of similar displacement, and that might give you good low
end
> response, but its not the longer stroke that provides directly this
> "advantage".  So, a 66 440 with the same intake manifold and ports as the
> 413 should have a stronger off line response almost proportional to the
> displacement difference...

We're getting a little theoretical again.....what I'd like to know is,
Square D, have you ever driven a 413-powered car?  If not, what are we
arguing about?

Mike Trettin
1956 Imperial Sedan, Turquoise