Hi Mark
Not a lame question, never be afraid or ashamed to ask questions to enrich
your knowledge.
The "normal" head on a Triumph has the inlet and exhaust on the same side of
the head, this is sometimes referred to as a reverse flow head, i.e. the
flow of gasses is reversed.
The cross flow head has the inlet and exhaust on opposite sides of the head,
therefore the gasses flow across the head hence cross flow. You will find
that the majority of modern European cars have cross flow heads, you can
also find crossflow heads on the Dolomite 1850, Dolomite Sprint, TR7 and
Stag.
HTH
Graham.
----- Original Message -----
From: "Mark Hooper" <mhooper@pixelsystems.com>
To: "'William Davies '" <bill@rarebits4classics.co.uk>; "'Graham Stretch '"
<technical@iwnet.screaming.net>; "'Triumph List '" <triumphs@autox.team.net>
Sent: Sunday, December 01, 2002 2:04 PM
Subject: RE: Some input on castings Please
> Can somebody help me in my benighted ignorance? Please tell me what
> PRECISELY defines a cross-flow head from a normal one. Please no one send
me
> a note saying it's the lack of eyes that gives it away. Last time I asked
> such a lame question my mailbox exploded with funny replies. :^P
>
> Is it the number of ports, their placement, some configuration of the dome
> of the cylinder? All of the above?
>
> Mark Hooper
> 1972 TR6
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