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Under pressure - Peter's Sprint 1.5 TB
Peter from
Söderhamn in Sweden has built
the Sprint you can see on this page. The base for his powerful red racer was
1986 Sprint 1.5. It was one of the cars which was already built on the Alfa 33
floorplan with rear drum brakes and outboardly mounted discs at the front.
In the year Peter when bought the car,
he only restored the chassis to get the car back on the road.
"There
was a massive amount of rust, all wheelarches and kickboxes were dead and the
floor was a big hole. I worked about 30 hours a week for 9 months only for the
rust repairs", Peter tells. The
following year he
replaced
all bushes with Powerflex / Superflex Bushes
and
mounted a
JR
lowering
spring kit. The original shock absorbers remained in the car. In 2005 Peter then decided to
modify the Sprint
more intensively and started to built a turbocharged 1.5 litre engine. He bought a 1.5
litre QV engine with 105 bhp
and reduced
the compression to about 7.9 : 1 by modifying the original pistons. A Garett T25 turbocharger which
was once installed in a Saab 900 was adapted to the Boxer engine. The
turbocharger was frist set to a max pressure of
0,8 bar. Meanwhile the turbo produces up to 1,3 bar - without thath the engine
would make any trouble. The engine still runs with the original Weber 36 IDF carburettors but
has a modified fuel supply system with a Saab 9000 fuel pump and a progressive
fuel pressure regulator made by Malpassi. An intercooler made of aluminum was
installed, too. This
intercooler was actually intended to work in a Nissan Skyline.
A sport air cleaner made by Autostyle helps the
engine to breave more easily. The
exhaust manifold is Peter's own creation because the serial manifold was of course
not meant to drive a turbocharger. It is covered with a special tape to isolate
it near the point where the turbo is mounted on the manifold. The rest of the
exhaust system was changed
to
a large 2,5 " diametre. To keep the oil temperature at a sensible level, Peter
installed an oil cooler. Oil cooler and intercooler were installed behind the
large air-inlet of the self-made front bumper. The position of the oil filter is
no longer behind the cylinder head on the right side of the engine. It was moved to the front besides the oil cooler. In addition, a larger filter is now
used. All recoolant hoses were exchanged against blue ones made of silicone
which are more secure
in hot surroundings like under the bonnet of this Sprint. The engine does not run
with normal Super 95 or Super Plus 98 octanes but with E85 which is a mixture of 85
% ethanol and 15 % gasoline. The fuel consumption is over 2 litres on 10 km (a
nicer way to tell that it's 20 litres on a 100 km...).
The result of Peter's effords is an
estimated power output of about 180 bhp.
To cope with this high-power
engine, Peter first installed a special clutch, with a Kennedy Stage 2 1200 kg
pressure plate (usually fitted to high-end VV Beetle versions) and a pro grip
disc. The original flywheel had to be modified to fit this clutch.
In 2006 Peter exchanged the Stage 2 clutch against Sinter Disc because the
old clutch could not cope with the risen torque after the boost pressure had
risen to 1.3 bar.
But Peter did not only modify the powertrain
of his Sprint. He also mounted Momo Ferrari 16" light alloy wheels with 205 /45
tyres and painted the brake calipers and drums in red. The original brake discs
were exchanged against discs with drilled holes.
The standart Sprint front bumper was replaced against a bumper of the Alfa 33 series
905 Peter has modified with a huge air dam himself. The unmodified bumper itself
fitted the Sprint without great changes. The rest is glassfibre. A little rear
air dam was added below the original bumper of the Sprint. It once also was part
of an Alfa 33 rear bumper. Meanwhile Peter added two large air intakes made of
glasfibre and polyester to the bonnet.
The sunroof you see on the photos was not Peter's idea. It had already been
mounted when Peter bought the car. He will not remove it - it is part of the
car's history and was a must-have in the Eighties.
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The
interior of Peter's Sprint was embellished with white gauges, an aluminum
gearlever knob, aluminum pedals, an Autostyle
boostpressure metre for the
turbocharger and a Lambda gauge. A
JVC soundsystem with MP3
player was installed
together with a DLS Genesis
4x50W
amplifier, a Cerwin Vega
8”
Subwoofer
and
5,25”
Cerwin Vega speakers and tweeters. Peter also installed electric front windows.
He took the Alfa 33 system and modified it to get it working in the
Sprint's doors. Swedish Sprints were sold with seat heating. The switches were
installed on the left side of the dashboard, there were you can adjust the
brightness of the instrument-lights. Peter replaced the original seat heating
switches against the switches for the electric windows.
Peter's next plans
concerning his Sprint are installing the front brake system with vented discs of
the Alfa 33 1.7 QV and replacing the original front seats against Sparco or
Cobra sport bucket seats.
With the risen power,
Peter has serious problems
when accelerating hard: the
tyres wont stop spinning in second and even in third gear!
You can write to Peter if
you click
here.
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Last Update: July, 25th 2007
Created: October, 30th 2005
© Layout and text by Tim Rauen. Photos by
Peter Otter. |