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TRIUMPH SPECIALISTS |
JIGSAW SHOP WINDOW SPARES, REPAIRS, RESTORATIONS, PERFORMANCE AND RACE PREPARATION |
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..a place to locate parts, standard, fast road and performance, for you car
.. recent introductions of new parts
.. a place to find the comprehensive range of services on offer, including:- repairs, restorations, race preparation and Four wheel alignment
LE MANS TRIUMPH SPITFIRE ADU1B .. build, technical info and races we have attended
Race Series with whom we race ADU1B
Updated January 2008 |
Useful Useless information Small Chassis Triumph This page is intended to keep all that useful but otherwise useless information in one place, i.e paint and trim codes, commission numbers for engines, gearboxes and differentials
ENGINE CODE IDENTIFICATION CHART (USA Engines are not listed) Many cars now have non standard/original engines fitted and it is always advisable to order parts by ENGINE NUMBER rather than car model
Prefix specification G or Y 948cc Herald DG 1300 Toledo GA 1147cc-1200 Herald DH 1300 Dolomite GD 1147cc-1200, 1250 Herald RD/RF 1300 FWD FC 1147cc-SpitfireMkI & II WB 1500 FWD GE 1296cc-Herald 13/60 YC 1500 RWD/Dol. GK 1296cc-Herald 13/60 late FP 1500 MG Midget FD 1296cc-Spitfire MkIII FH 1296cc-Spitfire MkIV FM 1492cc-Spitfire 1500 HB 1596cc-Vitesse 6 MB 2000 MkI HC 1998cc-Vitesse 2ltr/ MkI & II ME/ML 2000 MkII KC 1996cc-GT6 MkI & II CR/CP/MG/ KE 1998cc-GT6 MkIII MM/MN 2500 NOTE: Engines DG, DH, WB, YC, FP similar to FH, FM NOTE: Engines RD, RF similar GE, FD
PROPSHAFT LENGTHS Herald 50” 1.27m Herald with Overdrive (3 rail) 46.5” 1.18m Herald with Overdrive (Single rail) 45.5” 1.16m Vitesse 47” 1.19m Vitesse with Overdrive 43.5” 1.10m Spitfire MkI-IV 41.25” 1.05m Spitfire MkI-IV with Overdrive 38” 0.97m Spitfire 1500 38” 0.97m Spitfire 1500 with Overdrive 37” 0.94m GT6 38.75” 0.99m GT6 with Overdrive 35.25” 0.90m
WHAT DIFFERENTIAL DO I HAVE? There are a number of ways of identifying a differential – wither by counting the crown wheel teeth and dividing by the number of pinion teeth (eg c/w 35 pinion 9 = 35/9 = 8.39), or by counting the number of turns the front flange requires to turn both output flanges through 360 degrees (or one output flange through 720 degrees) – just more than 3 ½ means 3.63, just more than 4 = 4.11
By just looking at a differential you can often narrow down the ratio – for convenience we can split differential units into four types:- § TYPE A – square front pinion flange, 5/16 bolt holes all round (1/2AF spanner size), Small quarter shaft diameter inside, Casing No’s G, Y, FC to 120,000 § TYPE B - square front pinion flange, 5/16 bolt holes all round (1/2AF spanner size), Big quarter shaft diameter inside, Casing No’s GE, FC from 120,001 § TYPE C - square front pinion flange, 5/16 bolt holes all round (1/2AF spanner size), 3/8 bolt holes on output flanges (9/16AF spanner size), Casing No HB § TYPE D – Round front pinion flange, 3/8 bolt holes all round (9/16AF spanner size), Casing No’s FH, FK, FR, FD, HC, KC, KD
Type A & B are indistinguishable from the outside but Type A should not be fitted to Herald 13/60 as the quarter shafts are liable to break. Type C (which was only used for the Vitesse 6 originally) is very prone to quarter shaft failure
Having decided which differential you have you may now want to alter the ratio. The following table gives rounded figures for the miles/kilometers per 1000 rpm
RATIO mph/1000 kph/1000 mph/1000 kph/1000 In Fourth gear In Over drive top 4.875 13.50 21.50 17.00 27.00 4.55 14.50 23.00 18.00 29.00 4.11 16.00 25.50 20.00 32.00 3.89 17.00 27.00 21.00 33.50 3.63 18.00 29.00 22.50 36.00 3.27 20.00 32.00 25.00 40.00
Bigger wheels, non standard tyres etc., will affect the above figures
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BODY - EXTERIOR, INTERIOR & ACCESSORIES
GEARBOXES, OVERDRIVES, DIFFERENTIALS & PROPSHAFTS
to suit the small chassis range of cars - Spitfire, GT6, Herald and Vitesse
(carburettors & manifolds)
(after market additions)
USEFUL USELESS INFORMATION (paint & trim codes, commission numbers etc) TR Range Dolomite Range
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