Tach Drive
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Race engines sometimes use a mechanical tachometer driven off the camshaft, with the Timing Cover modified to suit.
Overview
Datsun Competition sold a Competition Distributor with tach drive, or a drive can be fitted to the timing cover.
Straight out drive on Timing Cover
tach drive covered
Smith's
Tach drive with a Smith's tachometer attached.
https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/tachdrive-1.jpg https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/tachdrive-2.jpg https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/tachdrive-3.jpg
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