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SILL OUTER BETA RH ALU

Part No:
850038BETAAL
Price
£429.95
Price Ex VAT @ 20%
£358.29

AVAILABLE This part is available to order

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Aluminium outer Sill Cover Right Hand TR2-3B. This outer sill cover is suitable for fitment to cars that have been converted to Triumph prototype Beta specification front wings and doors. It is necessary for the front edge of the sill to be brought out to meet the wing and wider door.

Revington TR have reproduced wing sets and door skins so that customers wanting to use the wider TR4 chassis can do so. The cockpit space is of course the same. The parts are a direct fit onto a standard TR2-3B body shell without the need for inner wing modifications although the sill will need to be brought out at the front edge to line up with the doors and front wings. Beta front wings are much more bulbous than standard TR2-3B wings as they have to accommodate the TR4 front track which is 4" wider than the TR2-3B. The line of the outer edge of the front wing needs to taper back to meet the back of the door swage line. This means that as the wing is 2" wider than standard directly above the front wheel, the wing is also slightly wider where it meets the door by 20mm. This then requires a wider door skin (see below in related products) and for the front edge of the sill to be brought out by 20mm. See 'Sill Alterations' below for guidance on how to achieve this. 

'BETA' Background

There were two development cars code named BETA, one red one black. The black car is owned by Neil Revington. They were used variously in left hand drive and right hand drive form and from time to time sported amongst other things different rear bumper and grill arrangements. These development cars represented a serious attempt by the factory to combine the old TR3A body with the new TR4 chassis at a time when Triumph could not afford the tooling for the TR4 body shells. We believe Triumph had a large quantity of the new TR4 chassis available therefore the Beta idea would have been a logical progression from the TR3A to give the car a much needed refresh in looks and performance. With the benefit of the wider track TR4 chassis, rack and pinion steering, an all synchromesh gearbox, improved seats and the light TR3A body, the car is easier to drive and has significant performance over a standard TR3A or TR4.
When Leyland took over Triumph, the money for the TR4 body shell tooling was immediately available so the Beta project was dropped and the TR4 programme moved ahead once more. The whereabouts of the red Beta is unclear but the black car is currently undergoing restoration at Revington TR.
 
Sill Alterations 
As the rear edge of the beta front wing where it meets the door in 20mm further out than standard, a modified door is required (see Beta door skins below for details) also the front edge of the sill needs to be brought out by 20mm too. This can be achieved in a variety of ways. the following options will all achieve the desired result: -
  • Slice through the top and the bottom of the outer sill near the flange almost all the way to the back leaving a small amount of metal untouched at the rear to act as a hing. Once the sill has been brought out to meet the wing and the door, introduce a fillet of steel tapering from 20mm to nothing to fill the gap. This would usually only be an option if the sills were either new or in exceptional condition.
  • Purchase a new pair of standard steel sills 850037 and 850038. knock flat the upper and lower edges that attach to the inner sill and weld on additional material. Re-edge the sill so that it tapers from 20mm (or whatever dimension suits your car) wider at the front to the standard dimension a the back. 
  • Purchase a purpose made pair of these Beta sills in aluminium that are made with the extra 20mm of width at the front tapering to nothing a the back. This is a very expensive option as the aluminium sills are hand made to special order. We can make steel sills too, however the option above to modify standard steel sills is far more cost effective.

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