for being unreliable in service, especially in the high-compression version which needed high-octane fuel, but this has now been largely overcome. The piston burning habits — thought to be the result of ignition timing — was later discovered to be due to a vibration induced lean burn situation involving the float bowls, easily correctable by flexibly mounting the carburettors. A total of 2,111 cars were built, in both coupé and roadster versions. A very few engines with the special displacement of were produced for racing purposes. Applications: 1958–60 MGA Twin-Cam litre engines The engine was enlarged to in 1958 by increasing the bore to . Applications: 1959–61 MGA 1600 1960–62 TVR Grantura Mark II, IIA 1959-61 Elva Courier Mark II 1.6 litre engines The engine was enlarged to in 1961 with another bore increase, this time to . 1961–62 MGA Mark II 1961–69 Austin Cambridge A60 1961-67 Morris J2 1/2-ton vans 1961–71 Morris Oxford VI 1961–71 Wolseley 16/60 1961–69 Riley 4/72 1961–68 MG Magnette Mark IV 1961–67 Austin 152 & Morris J2 1/2-ton van 1974–78 Sherpa van 1962–64 Morris Major Elite 1963–66 Tempo Matador 1966–67 Hanomag Matador 1967–73 Hanomag F20, Hanomag F25, Hanomag F30, Hanomag F35 1970–73 Mercedes-Benz L206, Mercedes-Benz L306 Navigator 1600 marine engine 1962–64 TVR Grantura Mark III 1963-64 Elva Courier Mark III The B series also formed the basis of the "Blue Streak" engine developed by BMC Australia for use in the locally-built Austin Freeway and Wolseley 24/80 models, both in turn variants of the existing Austin A60 Cambridge. The "Blue Streak" was an inline-6 development of the B series, adding two extra cylinders to create a engine. Different market demands in Australia required the fitting of a six-cylinder engine to a car the size of BMC's mid-range Farina model and the corporate C-series engine would not fit, requiring the development of the unique "Blue Streak" engine. Both models were withdrawn in 1965 and no further use of the engine was made. litre engines The engine was enlarged again to in 1962. Bore was and stroke was still , power varied by application with typically at 5,500 rpm in twin carburettor format and in single carburettor format as used in the Morris Marina. The engine at first had a three-bearing crankshaft with a five-bearing version appearing in 1964. There was also a diesel version of this capacity, used in the Leyland Sherpa van with a power output