Gaz, this bit you quoted agrees with what i just said:
Originally posted by Gazelle:
The road going powerplant
took the F1's 65-degree vee, used the same 5-valve per cylinder
design, and retained the block length. Everything else, however, is
different.
Exactly what I said - the design started life as an F1 engine,
and substantial changes were made to it.
Originally posted by Gazelle:
The capacity was increased to 4.7 litres, and the engine
hits the [b]rev limiter at 8,700 rpm, quite some way short
of the 14,000 attainable with the F1 engine - pneumatic valve
springs made such revs possible, but these were too unreliable to
be used due to air leakages (which have been often seen to cause
problems in Grands Prix), and were replaced with steel springs for
the road engine[b]
As I said earlier - the valve trains had to be changed. Also, at
8700rpm, the Mrelli system from the original F1 design was replaced
as well, if I recall correctly.
So if you agree with this article you posted, you agree with Heng's
definition of a detuned F1 engine: that an F1 engine was
extensively modified to make it suitable for road use.
As for noise, that's up to each country's traffic authority to make
a judgement on. Ferrari built the car as a) a production model, b)
a car that is not limited to race tracks but can in fact run on
normal roads and c) is available to buyers without a racing
licence. That makes it a road car, and that's Ferrari's
definition.
