Re: IML: 1965 Imperial 6 with factory Hemi

[dardal@xxxxxxxxxxxxxxx]

Quoting Bill Watson <wwatson5@xxxxxxxxx>:

> 
> And it's a true hemi-head six, with dual rocker shafts and hemispherical
> combustion chambers.   The engine was actually built by Armstrong-Siddeley,
> being based on the A-S Sapphire engine.  The British press was very
> hush-hush about the A-S connection at the time..
> 
> Bill
> Vancouver, BC

There is nothing unique to the "hemi" of Chrysler, other than Chrysler invented
the shortened name from "hemispherical" to "hemi".  Virtually all US made (and
probably internationally) radial aircraft engines with two valve per cylinder
were "hemis" (the exception was German 3 valve per cylinder and British 4 valve
per cylinder or Sleeve Valve radials).  Most modern flat four or six light
aircraft engines are also "hemi".  In the automotive world, Jaguar's XK engine
built from the late fourties at least until the seventies was a hemi, as well
as several Alfa Romeo engines (both of which were superior in specific
performance due to being dual overhead cam).  I am sure I am leaving many
others out.  Anyway, there is nothing unique to the "hemi" with Chrysler, other
than its the only push-rod V-8 being a hemi.  Ironically, the modern Chrysler
"hemi" is a whole lot less of a hemi than all the above examples.  May be the
"ford 500" has a real hemi in it!

D^2   




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