Denmark's fastest Alfasud
By Peter Dyrelund
This orange Alfasud is the fastest car in the Danish Alfa Romeo Club
Race Championship.It is made from ground by a person who is both a car painter and a panel
beater (coachbuilder), so he knows how to make his own car as good as
possible. The car bases on a 1983 Alfasud 1.5 ti QV. The body was sandblasted an repaired for rust (not much) and strengthend
on the known weak spots. After that it was epoxy-coated and painted in
orange. The complete suspension is carried over from an Alfa 33 16V. The
front
antiroll-bar is from an Alfasud series 1. Together with some brackets it
clears the 16V front crossmember. The rear antiroll-bar is the one made by the Danish Alfaclub (a little
modified). Yellow Konis were chosen as shock absorbers. The front coil springs
come from a Mercedes, the rear ones were supplied by a Volvo. All the
suspension bushes are made of nylon and metal rosejoints are
used (Uni-ball). A fast steering rack from Tarox makes cornering more excact. The original 1.5 litre 105 bhp Boxer had to leave the car in favour
of Alfa's strongest Boxer, the 1.7 16V. This engine was then further improved
with a balanced crankshaft and a
lightened flywheel. Racecams from Colombo & Bariani were installed
and now work together with mechanic tappets instead of the serial hydraulic ones.An Iresa cross-over manifold and a home made 2,5" exhaust
system allows
the engine to "breathe" faster. The fuel injection has a EFI computer motor management system (type
Euro 1). Specially made airboxes and nine sets of air intake trumpets with different
lenghts make it possible to adjust the torque characteristic to the actual
need. The power output is so raised from the serial 132 to 175 bhp depending
on the trumpets used. Earlier it had carburators and 90 mm forged pistons giving a displacement
of 1832 cc, but one piston broke. Due to delivery problems it now runs
with standard 87 mm pistons. The car's radiator had to leave its place in the front of the engine
in order to
create some room for a large oil cooler. So the (water) radiator moved to the back. Two electric fans assure
a sufficient cooling. The engine has an electric water pump.
The raised power of the engine made it necessary to install a stronger
gearbox. A 33 16V gearbox with a lower final transmission ratio and a sinter metallic clutch now replace the
serial clutch and gearbox. A Quaife Torsen antislip differential secures
that the power is transmitted to the road without much wheelspin.
8x13" wheels with slicks or Avon ACB10 semi-race tyres are used. The
front spoiler and the wheelarch extensions are copies of the Trofeo Alfasud
kit. The front spoiler is 3 cm lower than the original made by Autodelta. In order to decrease the car's kerb weight, the bonnet is made of aluminium
and the windows are made of polycarbonate. In the interior you find a Sparco seat and seatbelt. The steering wheel
and the rollcage are also made by Sparco. Maybe you will wonder why the exhaust pipe is bend to the left. The reason is that there are sound meassurements
when the Alfaclub DK races.
When passing by "Start", the sound may not exceed 95 dB(A). The microphone
for that measurement is placed at the right side of the track. Therefore
by bending the exhaust to the left, the "result" is lower, making it easier
to stay below the 95 dB(A). It is also the reason why the big airboxes
are mounted.
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Last Update: February, 23rd 2004
Created:
December, 12th 2001
© Text and photos by Peter Dyrelund. Layout by Tim Rauen. |