It used a single carburettor, low compression version of the Grand Prix engine.
Most of the problems with the Twin-Cam engine were rectified with the low compression version, but by then the damage had already been done.
The RAF 7 was a high compression version of the same engine.
The majority of fittings shown on this page are available in both capillary and compression versions for copper pipe.
High compression version with Toyota TTC-C catalytic converter.
It was a higher compression version (6.7:1 from the earlier 5.72:1) of the original and otherwise very similar Praga B, which provided 36 hp (27 kW).
Low compression version converted through field conversion of B1B.
A high compression version of the engine (Bz IVü) was produced from 1917 onwards and can be recognised by the red bands painted on each cylinder.
It used the same carburetor models as the low compression version (Motorcraft 1V and Motorcraft VV).
The engine was available in either a low compression or a (less frequently specified) high compression version.
