Kai,
Good analysis.
>As Mike Pierce told me a few years ago "the Triumph heads are already
>fairly
>good... so there isn't too much to improve on."
I have almost no experience with the conversion of a straight-6 head to a
x-flow
design, except with the 250 cubic inch Ford straight 6 built in Australia
for
the past 30+ years. This head started life based on the US 200 cubic inch
motor
from the 60s, and never was designed as a "sporting" motor.
However, some time in the 80s Ford Australia did build a x-flow head for
this
donk which really woke it up, and gave it comparable, albeity peaky,
performance
to the Aussie Ford bread and butter 5-liter V8. More recently, Ford Aust
swapped
in DOHC and have now turbocharged this motor. Whil still not in the same
league as
the awesome TVR Speed 6, this is a suprisingly fast car. Amazing what you
can
do to an old donk with just a bit of head work.
Shane
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