On Wed, 22 Apr 1998, ArthurK101 wrote:
> In a message dated 98-04-22 14:42:04 EDT, ARhodes@compuserve.com writes:
>
> > It is strange (but is that surprising?) that
> > Triumph used Strombergs for 100 cars then back to SU...
> > [then] back to Strombergs for a long period....
> Tony, not strange. Reason for going to ZS's was economics. SU's were
> made by a Triumph rival, who was charging too much per unit. ZS's could
> be obtained at a more reasonable price. (Both carbs work on the same
> principle).
Point of fact, that supplier of ZS was, for all practical purposes,
Leyland-Triumph itself. It was they who designed the carburetor and then
went to Zenith to get it manufactured. SU at the time was owned by "rival"
BMC, who charged Leyland-Triumph rather more for an SU than it charged
itself.
> It appears they wanted to see how ZS installation on the build line
> would work. They also probably had some SU's left over from a previous
> buy. Cheers.
As with many production changes in Triumphs, the change was sporadic. Also
worth noting is that the ZS was designed to be completely interchangeable
(in pairs, of course) with the SU, utilizing the same manifold, and
without any discernable difference in performance (until the blasted
diaphragms split in the ZS, that is).
--Andy
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