Datsun sidevalve engine


Nissan's sidevalve engines were based on the Austin 7 engine, with which they shared the stroke. The series began with a 495 cc iteration for the 1930 Datson Type 10 and ended with the 860 cc Type 10 engine which was built until 1964 for light commercial vehicles. Later versions were called the B-1.

DAT 495 cc

The displacement of the original version was kept beneath a half litre since driver's licenses were not required for such cars after a ministerial decision of 1930. The engine was a square design, with a bore and stroke of. Maximum power was at 3700 rpm.
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For 1933, the rule regarding drivers' licenses was changed so that cars of up to 750 cc could be driven without a license. Accordingly, Datsun modified their engine which now displaced from a bore and stroke of. These dimensions are exactly the same as those of the Austin 7. It produced at 3000 rpm, although this later increased to.
This engine is a flat-head side valve automobile engine, a supposedly new design which was slightly smaller but also slightly more powerful than the earlier DAT engine. Bore and stroke were nearly the same as for the earlier version, at. Power is ; in 1936 the engine was upgraded to produce. Postwar cars again claimed at 3600 rpm.
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The Datsun Type 10 engine was a engine is a flat-head side valve automobile engine produced from 1950 through 1964. Bore and stroke was in the undersquare British style. Later on, the engine's name was abbreviated to D-10.
Output was originally ; this increased to at 4000 rpm and at 2400 rpm with the introduction of the 1953 Datsuns, thanks to an increased compression ratio of 6.5:1. The engine used a single carburetor. This engine was called the B-1 when installed in the 1958-1964 Datsun Cabstar; this version produces at 5200 rpm.
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