Go to Ferrari.com and go to the past road cars. They have the specs for the orginal 208, the 208 Turbo and the later turbo gts/gtb. Started around 180 HP in the 70s, dropped to 155 in the early 80s, turbo brought it back to 220, and the later intercooler popped it to 245. My understanding is that these are basically the same motor as the corresponding 3.0 liters, just sleeved down.
cool thanks for the info very hard too find any info on it I only thought the 208 turbo was only a turbo in the early versions never saw any pics of the later versions that would be intresting too use that turbo set up on a 308
I am sure you can get other turbos off the shelve for a lot less with a lot better performance. That said I wonder how strong the selves are. If they are really strong you could crank up the boost and add a modern intercooler to the car. I am sure they can make 'interesting' horsepower. If they were available here in the US I would pick one up to tinker with. Would seem like fun.
have a look on Amazon for Ferrari dino 308 & mondial portfolio ISBN 1-85520-358-8 Original Ferrari V8 ISBN 1-870979-78-8