I think Alan told me the S20 and Prince G7 engines are the same except
for the 4-valve head. It's also a heavyweight lump compared to the
L6 type. Just like any Mercedes engine. The UY engine wasn't from the
same family. I will let Alan straighten out this one. If the engine is heavier
than 400 lbs, I'm not interested.
Thomas
in Sweden
RoadsteRob@aol.com wrote:
>
>
> The engine in the Fairlady 2000 S Roadster was a Nissan prototype, and the
> car was probably the first Datsun/Nissan car with an OHC Unit. The engine was
> known as the UY unit and was a 6 cylinder, 12 spark plug, twin distributor
> unit - the car stormed the qualifying of the 1966 Japanese GP although she
> did not last the race. There is a surviving unit with some parts missing
> owned by a member of the Japanese SROC (although the car is believed scrapped
> by Nissan - shame). It had Nissan stamped on both cam covers - I have a few
> contemporary pics of this car which was a real neat affair, with a
> streamlined underside, radiused rear arches, Watanabes and some really neat
> features.
>
> Les, fancy building a replica??
>
> Although the 2000 S engine was the forerunner to Nissan's OHC technology it
> was not related to the Z432 S20 Unit, which only had the 6 sparkers and which
> was taken from the first Skyline GT-R. The Z432 was advertised as a Z with a
> Skyline engine in Japan. The S Series engine of the Z432 was not the same
> block as the Z's L Series block, although there were similarities. The L
> Series engine of the 240Z was derived from an engine used in the 1968 Skyline
> C-10, whereas the GT-R's S Series engine was derived from the Prince GR-8
> engine used in the Nissan R380-II race cars. (They were both derived from
> Prince technology from the Mercedes-Prince license agreement). (I could go on
> and on - somebody shoot me).
>
> Sorry if that's bored the pants off everyone but there's a lot of rubbish
> written about the S20 unit which in Japan is still worshipped by tuners and
> classic car enthusiasts alike. I nearly imported a Z432 (as well as a Silvia)
> a few years ago, but I lost my job - twice - REAL shame.
>
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