[alfa] Alfa technical history

["John S." <roadtrip999@xxxxxxxxxxx>]

Try Chris Rees' "Original Alfa Romeo Spider."  Great book. I'm not sure it 
gets as deep as sychro ring differences, but he does cover the major mech 
and cosmetic changes.

As far as the SPICA injection system goes . . . . yes there were some fairly 
important changes. Most noteably the 69 model pumps had only an internal 
fuel cutoff whereas later pumps had an electromechanical fuel cutoff 
solenoid. Also, in 1980, the induction system changed to a single butterfly 
valve for air intake vs the previous 4 (one for each cylinder. As far as the 
pumps go, there were a couple of minor changes, but each year had a 
different 3D cam due to the changing emissions standards, as well as some 
different cams interyear due to even more strigent Calif standards. But to a 
great degree the pumps were the same after 69. The 3D cams (fuel delivery 
scheduling) are interchangable between the post 69 pumps.

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