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mikeC



Joined: 31 Jul 2009
Posts: 1470
Location: Market Warsop, Nottinghamshire

PostPosted: Thu Feb 14, 2019 10:03 am    Post subject: Reply with quote

Norseman wrote:


mike C : still leaves the question as to why all Rover's main competitors chose to use twin carbs on their auto's (some of which I've owned)



The Rover 2000/2200engine was a big bore/short stroke engine, which by its nature develops less torque at low speeds than traditional 'British' long-stroke engines. The Triumph 2000 engine in comparison had low-speed pulling power to spare, so the need to drop to a smaller or single carb arrangement was not so necessary.
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recently departed: 1967 Singer Chamois, 1914 Saxon, 1930 Morris Cowley, 1936 BSA Scout, 1958 Lancia Appia coupe, 1922 Star 11.9 ... the list goes on!
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Norseman



Joined: 09 Jan 2019
Posts: 71
Location: Essex UK

PostPosted: Mon Feb 18, 2019 12:17 am    Post subject: Reply with quote

mikeC wrote:
Norseman wrote:


mike C : still leaves the question as to why all Rover's main competitors chose to use twin carbs on their auto's (some of which I've owned)



The Rover 2000/2200engine was a big bore/short stroke engine, which by its nature develops less torque at low speeds than traditional 'British' long-stroke engines. The Triumph 2000 engine in comparison had low-speed pulling power to spare, so the need to drop to a smaller or single carb arrangement was not so necessary.


Good point.
I haven't got the manual handy & it's been a long time since my ownership of a 6/110 but I recall it was a under-square engine with 2 SU's whereas the Humber was an over-square unit with a pair of Strombergs. both auto's.
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alanb



Joined: 10 Sep 2012
Posts: 352
Location: Berkshire.

PostPosted: Mon Feb 18, 2019 2:20 pm    Post subject: Reply with quote

The original new super snipe of 1958 was fitted with an engine designed by Armstrong Siddeley was a 2.6L square engine 82.55x82.55mm 112bhp the later series II 3L was over square at 87.2x82.55mm 129bhp both were fitted with a single zenith carb until the series V when twin stromberg carbs were fitted and power increased to 138bhp, engines were the same for both manual and auto transmission.
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