Archive for the Technical Category

November 8, 2010 / Technical

Differences: Fiat 1600S vs. OSCA 1600 GT engines

Differences: Fiat 1600S vs. OSCA 1600 GT engines

Because O.S.C.A. built engines for Fiat for their 1600S cabriolet based on the same design as their own 1600cc engines, they two engines share many similarities in configuration.   However, the follo

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November 8, 2010 / Technical

OSCA 1600 GT half speed gear

OSCA 1600 GT half speed gear

One of the items that can become worn (if cam chains have not been properly serviced) is the teeth on the half-speed gear.  In restoring chassis 006, I purchased a spare half-speed gear with hang tag

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November 8, 2010 / Technical

OSCA 1600 GT Engine Block Castings

Several owners of 1600 GT's have confirmed their engine blocks are stamped 4060944 and then have what is believed to be a date code stamp (for example: OU27, OX27)

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November 8, 2010 / Technical

OSCA 1600 GT journals & main bearings

OSCA 1600 GT journals & main bearings

The Fiat OSCA 1500S has three main journals while the 1600S has five (this is the same Tipo 118 design shared with the OSCA 1600 GT).   The main bearings and journals are slotted (oil channel) on the

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November 8, 2010 / Technical

OSCA 1600 GT Ignition Switch

OSCA 1600 GT Ignition Switch

One of the parts that is most difficult to locate for the 1600 GT is the original ignition switch, which is shared with the Lancia Aurelia of the late 1950's/early 196o's.   These are very difficult

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November 8, 2010 / Technical

OSCA 1600 GT Dash Switches

OSCA 1600 GT Dash Switches

1600 GT's that have been raced are often missing original switches and/or gauges.   This post addresses the switches and their functionality.  I have found eBay/Italy as a great resource for finding

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November 8, 2010 / Technical

OSCA 1600 GT Head Identification

OSCA 1600 GT Head Identification

Because there is so little documentation known for 1600 GT's, comparing castings on parts with other owners is sometimes the only way to verify what is correct.   There are many variants known to hav

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November 8, 2010 / Technical

OSCA 1600 GT Flywheel

OSCA 1600 GT Flywheel

OSCA 1600 GT engines are approaching 50 years old and shared many common Fiat parts of their era.  Thus, the metal fatigue and often poor servicing on these cars has produced many engines needing ref

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November 8, 2010 / Technical

Zagato Seats

Zagato Seats

For any 1600GT owners considering replacing their factory seats with Zagato seats (as featured in the Alfa SZ), I have measurements I can share from an actual SZ that I took myself: Seat cushion w

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November 8, 2010 / Technical

Fiat OSCA 1500S/1600S Service Manual

A two-part copy of the original OSCA Fiat cabriolet Service Manual can be found by either search www.scribd.com (account: OSCA 1600GT) or via download at:  http://www.blueplanetmedia.com/fiat/resourc

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