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Peter's (former) much improved every day use Alfasud
Text and photos by Peter Dyrelund
People who often visit this site maybe already know Peter Dyrelund from Denmark and his fast Alfasuds which are all in a better condition as at the time when they left the factory. In 1978 he bought his first Alfasud - a used 5m he used for one year. In 1979 he decided to buy a new one to be able to preserve it in as good a condition
began. Peter had to
use the car as an everyday transport for a distance of almost two times
a 100 km, so the improvements might not jeopardize normal driving quality.
The car was also used for hobby in slalom, trackdays and driver courses
(Nürburgring and other places). At first the car
was fitted with front inner wheel guards and got a rust protection with a 10-year warranty. The car got sound deadening material under the bonnet, between the engine
and passenger compartment, under the rear seat and in the luggage room;
also an additional carpet was installed on the front and rear shelf. This
made the car very silent inside. The engine was optimized on a roll-bench,
and in fact it was revealed that it had only 74 bhp when first tested.
After modifications to the carburettor, ignition timing and ignition advance
curve, the engine reached its quoted performance of 84
bhp. The Golden Lodge spark plugs were
185/60 HR 13 Pirelli P6 and the shock absorbers to Bilstein Sport (gas). The front and rear spoilers and wheelarch extensions from the ti-model were mounted too. When driving on the tracks, the car was fitted with 6x13" steel rims
for rain tyres and 7x13" Ronal A1 for slick tyres. The first major change
came after Peter made a wrong gearshift (from 2nd to 1st, instead of to
3rd gear) on a racetrack. The outlet valves were bent, and instead of repairing
the engine, Peter found
an almost new 1.5 95 bhp engine (the first with the double Webers) and
the "95 bhp gearbox" which has a slightly higher 5th gear. This was a very
good engine. In fact among Boxer-lovers the two engines considered best
touch, a cross-over CSC exhaust system completed
the engine conversion. On the suspension side the Bilstein shock absorbers (which actually
raised the car a little because of the gas) were changed to yellow Konis
and the springs to lower Eibach springs. The front discs were changed to
ventilated discs and the steering got a faster rack and pinion. The suspension
was now great, but the engine was a little disappointment. About 108 bhp
was the outcome, and the low rev torque was bad – no hiccups but just "flat".
The fuel economy dropped from 8,3 l/100 km to a little below 10l /100 km. What was wrong? The guess was that it needed a raise in compression
ratio, because wilder cams in fact give a lower effective compression.
In search of a solution Peter found Harry Schulze (who was several times
German Trofeo Alfasud Champion). He was able to deliver the necessary forged
pistons with a higher compression ratio. It was agreed that Harry Schulze should deliver
an engine block with high compression forged pistons, polished conrods and balanced crank (still a 1.5). That proved to be a perfect solution.
Changing the engine block – the only difference in
power was in fact the higher compression ratio – brought back the low end
torque, the economy (again 8,3 l/100 km), and gave more than 120
bhp after optimizing on the roll-bench. This engine was a joy driving.
Good low end torque, free revving and very smooth.
Now the technical specification was perfect, but the bodywork was showing
some signs of rust. It was rust-
185/60HR14 Pirelli P6 were mounted. Some
Now the car was as perfect as a street Alfasud could ever be at that time. The only possible improvements at that time (1985) was that you could get a special crank with 70 mm stroke and 85 mm pistons, creating a 1.6 engine. But that was very expensive. In 1987 Peter moved to new premises, where he should not use the car for every day transport, so new plans developed. The result of one of the plans was a series III Alfasud 1.5 Ti with Sprintex supercharger. The yellow Alfasud now had 250.000 km (!) on the odometer, and it was sold for 8.000 Euro, same as the price of the new car in Denmark in 1979! Many years later Peter decided to make a new perfect Alfasud, an Alfasud 1.5 QV with 1.7 litre engine.
Last Update: May, 27th 2004 Created: March, 7th 2003 © Layout by Tim Rauen. Text and photos by Peter Dyrelund. |