Re: Just bought a 1956 Patrician (newbie to Packard)

Posted by Packard53 On 2007/11/8 21:04:09

dr: I stand corrected that the engine wasn't a Fiat unit.
I myself while not a leading authority on Italian races cars like yourself, however I have pretty fair knowledge of the Italian car industry.

The engine powering the Moretti, I am very certain Moretti had help from Fiat in designing and building the engine.
The engine started out life as the 600 which was actually 592cc in displacement, with a bore of 57 mm and a stroke of 56 mm. The compression ratio was 7.0:1. The engine for the 750 I believe was as we say here a hot rodded version
of the 600 engine. The 750 engine was actually 747cc with a bore of 60mm and a stroke of 66mm and a compression ratio of 7:1 or 7.5:1. With a compression ratio of 7.0:1 the engine was rated at 51 to 52 horsepower at 6000 rpm. The engine with a compression ratio of 7.5:1 was rated at 58 horsepower at 7000 rpms with twin carbs. So I am very sure that with more modifications that 70 horsepower rating for racing version of the 750 is a very creditable figure.

Here is a question for you. Moretti was imported into the USA between the years of 1950 and 1960. There were two distributors in the USA. Can you name them?

John F. Shireman