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....
Lucas - type M418G, L-3
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Comments = superseded by 40495
Lucas - type B12
|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
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.
|Dimension:||5.50R16 H(84) (175/80R16)|
|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|
valve clearance = 0,3mm
Dynamo for the Austin A90 Atlantic:
Lucas - Type C45 PV3 (early type)
Lucas - Type C45 PV4 (later type)