[DeTomaso] 2V heads

[MikeLDrew at aol.com]

In a message dated 1/10/07 15:50:30, ehpantera at yahoo.com writes:

<< Does anyone have any experience with the Aussie closed chamber 2V heads? 
What RPM are they good to? Is there much improvement over 4V heads in a stock 
'73 engine. >>

>>>The answer is, 'that depends'.  2V Aussie heads have the best of both 
worlds--the quench combustion chamber of the early 4V heads, and the smaller 
intake/exhaust port size of the 2V heads.  They are torque monsters, great for 
developing all kinds of lunge from down low.  However, they reportedly are flow 
limited and sort of poop out around 6000 rpm or so (with some notable 
exceptions--these are broad generalities I am offering up).

If you have a fairly ordinary motor, with a decent cam, but no crazy 
modifications, switching to 2V Aussie heads and a matching intake will probably result 
in a great increase in perceived torque, and maybe some increase in 
horsepower.  It will 'feel' much faster.  I have driven a Pantera that had Aussie heads 
installed atop a stock bottom end (stock cam), and it was notably snappier 
than most other Panteras I've driven.

If you choose your components wisely, you can build a monster motor with 
these heads (like Charlie McCall's, or Larry Stock's.)  But if you want to spin at 
7000+ rpm, early closed-chamber 4V heads are probably a better bet.

Personally, if I didn't already have a set of Aussie heads in-hand and wanted 
to swap, I would probably install Edelbrock heads, which give all the 
advantages of Aussie heads and more, plus lighter weight, and not much more cost.

Note that 2V American heads (open chamber) suck.  They make great wheel 
chocks however. :>)

Mike