Peter's best Alfasud Ti
By Peter Dyrelund
Peter Dyrelund from Denmark has owned five Alfasuds, and he still holds three of them. The first one is a white Alfasud Ti 1.5 which had been totaly diassembled, sandblasted and metallised. It is used for clubracing. The second one is a red Alfasud 1.2 ti series I which is still a hundred percent original. The third Alfasud is the one you can see on this page - Peter's masterpiece for the use on road and track.
The green Alfasud here was build upon good knowledge about the Alfasud and its weak spots. The intention was to build an Alfasud as good as - or better than - a new one straight from the factory. It should not ne kept as original as possible (for that reason, Peter owns the red series I Alfasud ti) but should be improved concerning roadholding, built quality and power.
Peter found a metallic grey Alfasud 1.5 ti QV in Germany in 1995, not far from Düsseldorf. It was advertised in the German Alfaclub magazine. The car had 100.000 km on the odometer, and it was almost without rust and never repaired. That was a good basis for a perfect Alfasud. The car was taken totally apart, sandblasted, reinforced at the weak spots (e.g. front rails), metallised and painted in a smart metallic green colour. The paint job is very well done.
The best version of the Boxer-engine is - in most enthusiastsí eyes - the 1.7 version with carburettors. Such an engine with low mileage was mounted at first. In the beginning of 2005 Peter has changed this engine to a much more powerful version. The engine has been built without regarding the cost to be the very best for a road going Alfasud.
Peter has modified a 1.7 litre 8V boxer-engine with 90 mm JE forged pistons which have raised the compression ratio to 11,5:1 and the volume to 1832 cc. For better airflow bigger inlet valves (41,5 mm) were fitted. The camshafts have been changed to Colombo & Bariani 280S, and adjustable cam belt wheels have been fitted, so that the adjustment of the cams can be fine tuned. The first version of the 1.7 boxer-engine still had mechanical valve lifters, and such cylinder heads are used. The shape of the combustion chambers is optimised and the inlet channels are enlarged, polished and optimised in a flowbench. The polished valve covers with "Alfa Sport" text are single productions.
The normal 40 mm Weber or Dell'Orto carburettors have been changed in favour of 40 mm Jenvey throttle bodies fitted with Weber Marelli 330 ml 4-hole injection nozzles. An EFI Technology Euro96 engine management system with self-learning function manages injection and ignition. The EFI manages full sequential injection, powers a shift light, limits the rews by soft and (later) hard cut, and can also manage pit-lane-speed and anti spin function. The setup of the EFI is done by a laptop computer. The EFI Technology system comes from the race world and is used in the German DTM, ETCC and all the Formula 3000 race cars. The EFI module is fitted in the service part of the engine compartment behind the McPherson strut fitting. The old Bosch ignition system has been replaced by the EFI and a four-point ignition coil. The EFI gets information about the fase of the engine (for the sequential injection) by a Hall-element which is built in the modified distributor and by another Hall-element placed at the flywheel.
The exact power has not been measured yet but should be in the region of 150 bhp at 6.500 rpm and 180 Nm at 5.000 rpm. The flywheel is purpose built of aeroplane-aluminium. The aluminium main part of the flywheel has been fitted with the original starter ring and a high strength steel plate for the friction part of the flywheel. The weight of the total flywheel has been reduced from 7,3 kg to 4 kg. The extensive modifications do not reveal themselves at the first glance in the engine compartment, which looks like a normal twin carburettor boxer-engine. The gearbox is the one of a 33 16V and it is fitted with a Quaife Torsen limited slip differential. Provisions for the inboard brakes have been made, and the drive for the speedometer has been changed to the mechanical one. The whole powerpack has been mounted using new parts everywhere. That includes driveshafts, 16V clutch, clutch slave cylinder, engine mounting rubber, fuel hoses, camshaft belts and tensioners, gear-starter motor from an Alfa 33 16V, alternator, a special small American SBS battery and a K&N air cleaner. The exhaust is an Iresa-one with cross-over manifold and a diametre of 60 mm.
Every light front and rear is new and also the headlight surroundings. A new windscreen and new rubbers at the front and rear have been mounted. The car has been rustprotected with Dinitrol 1000 waxoil everywhere during and after the completion and with Dinitrol ML4 underneath. At the front there are Alfa 33 plastic inner wing protections and at the rear there are plastic inner wing protections from an Opel Kadett D. Almost every part has been mounted with stainless steel bolts (bumpers, frontwings, doors, bonnet, hatch, tank, etc.).
The music system consists of a Sony RDS radio with 10CD pack and four Pioneer
speakers. The antenna is electronic and hidden behind the rear wiew mirror.
Last Update: February, 27th 2005 Created: April, 18th 2002
© Layout by Tim Rauen. Text and photos by Peter Dyrelund.