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olavr:
Thank you Mr Guy Moerenhout and sfloriano who sent me a PM
I will try to contact the persons you suggests

sfloriano:
Lucky enough to find some picture in an old french magazine from 1959!







sorry for the quality, I had no scanner that day , so it's taken from my cell phone :-)

viotti600:

--- Quote from: sfloriano on October 20, 2011, 10:52:50 pm ---Lucky enough to find some picture in an old french magazine from 1959!

--- End quote ---

Very nice find on those photos - you never know what you'll find in old car magazines! ;)

However, the third photo is not a Siata car, it's an Allemano 750 Spider (the text shown above it also says this).

olavr:
Hello again!
It appears that my car (Amica -56) has a motor with increased stroke. Stroke is 65 mm instead of normal 600, 56 mm. This increases the capacity to 735 ccm. It also has a special exhaust manifold wit a collector pipe.
I recieved from mr Sannia a copy of a brochure describing the engine modification.
I wonder if these modifications were done by Siata, or maybe was Abarth involved?

viotti600:

--- Quote from: olavr on February 05, 2012, 11:12:52 am ---It appears that my car (Amica -56) has a motor with increased stroke. Stroke is 65 mm instead of normal 600, 56 mm. This increases the capacity to 735 ccm.
--- End quote ---

That is correct. Siata "tuned" their Fiat 600 engines by using pistons with the standard 600 bore of 60mm along with a 65mm-stroke crankshaft, giving 735cc. The engine had a 7.7:1 compression ratio & a rev limit of ~5000rpm, giving 31HP & a top speed of nearly 71mph (for Coupe & Sedan bodies).



--- Quote from: olavr on February 05, 2012, 11:12:52 am ---I wonder if these modifications were done by Siata, or maybe was Abarth involved?

--- End quote ---

These were Siata modifications, done separately from the Abarths. Siata offered the 60mm pistons & 65mm crankshaft as a "750" kit for the Fiat 600, as well (see photo below).

The Abarth 750's used parts with slightly different measurements, namely 61mm pistons with a 64mm crankshaft, 9.1:1 (or 9.8:1) compression ratio & 42-44hp with 747cc.

Were you able to salvage any of the specialty parts from your Siata's engine?

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