Here you will find some technical information's
front cover 1B3338
front cover 1B3338 with radial seal
Oil pressure switch
Thread for Oil gauge:
I have on the engine block 1/4" BSP female and the oil pressure pipe ends with 1/" BSP male.
Inbetween is an flexible hose with female ends. To get the female end of the flexible hose to the engine, an adapter with two male ends is fitted.
I have fitted an electrical fuel pump on my A90 Atlantic, therefore a oil pressure switch must be available for security reason.
I bought an oil pressure switch on ebay (thread 1/8 NPD) but the t-Adapter is the problem. I couldn't find one with 1/4" BSP on both ends, only 1/8" BSP is available (~ 10 GBP).
to be continued....
Starting motor
Lucas - type M418G, L-3
Distributer
The distributer for the A90 Atlantic is: Lucas - type DVX4A
in one of the earlier service book (June 1950) I found DK7.4A.
later Lucas DM2 (P4)
later type starts May 1951
Service number = 40320A/B
rotation = ClockWise
ECM curve = 430
Model = DM2P4
RPM 1 = 2500 / Advance1 (± 1°) = 17°
RPM 2 = 1250 / Advance2 (± 1°) = 9°
RPM 3 = 600 / Advance3 (± 1°) = 2°
no advance below = 325years = 1949-52
make = Austin, Austin Healey
models = 1949-1952
Austin A90 Atlantic, 1953-56 Austin Healey 100-4 BN1/2
Comments = superseded by 40495
Ignition coil
Lucas - type B12
Spark Plug
Anzugsdrehmomente für Zündkerzen mit flachem Sitz(mit Dichtung): | ||||
18 mm | 14 mm | 12 mm | 10 mm | |
Gußeisenkopf | 35-45 Nm | 25-35 Nm | 15-25 Nm | 10-15 Nm |
Aluminiumkopf | 35-40 Nm | 25-30 Nm | 15-20 Nm | 10-12 Nm |
The sparking plugs fitted to the A90 Atlantic is the long reach 14 mm type "Campion NA8"
I have a N5C on my A90 Atlantic
Carburettor
Austin A90 Atlantic is fitted with two
SU H4 carburettors.
(AUC 537, 2660 cc)
Tyres & Tubes & Pressure
I bought now (March 2010) new tyres from Munich (www.oldtimer-reifen.de).
There is a Radial tyre made by Michelin. I choose the radial type instead of the diagonal type for security and comfort, the price was nearly the same as for the diagonal type.
5.50x16 X-Stop
Marke: | Michelin |
Dimension: | 5.50R16 H(84) (175/80R16) |
Tubetype/ Tubeless: |
Tubetype |
Tragfähigkeit: | 500 kg |
Zul. Höchstgeschw.: | 210 km/h |
Max. Breite: | 175 mm |
Max. Höhe: | 685 mm |
The correct tube for the A90 Atlantic convertible rim is the TR-15 one.
The TR-13 also fits, because its smaller, but to avoid movement of the tube, the TR-15 should be taken.
Recommended Tyre Pressure: | ||||
2 Passengers | Full loaaded | |||
Front | Rear | Front | Rear | |
Atlantic |
26 lbs./inch² 1,79 bar |
26 lbs./inch² 1,79 bar |
26 lbs./inch² 1,79 bar |
28 lbs./inch² 1,93 bar |
Valve
valve clearance = 0,3mm
Dynamo
Dynamo for the Austin A90 Atlantic:
Lucas - Type C45 PV3 (early type)
Lucas - Type C45 PV4 (later type)