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Improved Bedfords

9th September 1932
Page 62
Page 62, 9th September 1932 — Improved Bedfords
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Vauxhall Motors, Ltd., Announces Increased Power for Passengervehicle Engine, also Improved Lorry Bodywork

F0R some time we have been aware of experiments proceeding at the Luton works of Vauxhall Motors, Ltd., the object being to obtain from the larger Vauxhall engine used in Bedford passenger chassis an improved brakehorse-power reading.

Although the bore and stroke of the engine remain as before, namely, 3-,§g ins., and 31 ins., the R.A.C. rating being 26.3 h.p., the maximum power developed has been increased from 44 b.h.p. at 2,400 r.p.m. to 57 b.h.p. at 2,800 r.p.m. This improvement is obtained by modifications to the cylinder head, induction system, valves and valve gear.

With vgard to the cylinder head, the compression ratio has been raised from 5 to 1 to 5.2 to 1. The inlet ports have been increased in diameter, larger inlet and exhaust valves being used by reapportioning the valve-rocker leverage, the valve lift has been increased.

Two modifications have been made to the Zenith U-type carburetter. The choke control is now interconnected with the throttle in such a way that pulling out the choke correctly sets the throttle in the ideal position for starting; at the same time, a spring-loaded choke valve prevents over-choking when' starting up.

The other alteration is to the accelerating well. Whereas with the original carburetter the well gave an instant discharge on the opening of the throttle, the new design allows a gradual release of this petrol, thus cutting out flat spots in the acceleration, as well as economiz ing petrol. The combined result of the changes is a livelier engine.

Vauxhall Motors, Ltd., has also made several detail improvements in the constructional features of standard cab and lorry bodies fitted to both short and long Bedford 30-cwt. and 2-ton chassis.

In the first place, strong detachable corner pillars are now fitted to the ordinary lorry body made at Luton. These are of timber reinforced with steel, and their fitting or removal from steel corner sockets is extremely easy. The depth of the sockets is sufficient to ensure rigidity, and this, of course, is augmented by bolting up the hinged lorry sides and tailboard to the pillars.

The tailboard itself has been improved by the fitting of chains with quick-acting hooks and the use of a heavier metal top rail, whilst large rubber buffers on the body longitudinals prevent the illeffects of impact when the tailboard is dropped.

A good point about the latest lorry body is that the solid longitudinal wood runners, clamped down to the chassis frame, considerably strengthen the latter. The cross-bearers are fixed to these runners by heavy angle irons. Finally, the standard cab has been improved by a new shape of front peak.

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