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The TR250-6 Supercharger provides approximate 6 psi of boost at sea level which would increase horsepower by up to 40% on a carburettor model TR6 with a good engine. American specification cars will benefit from a larger power increase than European models due to the lower engine compression they have. This kit does not work in conjunction with the Lucas petrol injection.

The Moss TR250-6 Supercharger system uses the same Eaton positive displacement roots-type supercharger found on contemporary OE applications such as Mercedes Benz and Jaguar. The supercharger is the latest M62 design, which features helical rotors and an internal vacuum controlled bypass valve for high efficiency and economic cruising.

The special intake manifold has been carefully designed for balanced flow for all cylinders. Rapid prototype materials have allowed our R & D team to design a casting which can be machined to fit either the early or later head port layout, which allows us to keep the cost of this comprehensive kit down. After looking at available carburettors, a Holley 2 bbl was chosen, which has adequate flow for just about any stage of development while also looking fantastic. The carburettor is specially built for Moss and incorporates a number of passage modifications to improve operation during high boost and transition.

The comprehensive kit includes a new water pump, electric fuel pump, and a basic air filter, which we anticipate many customers may wish to upgrade to a custom performance unit or perhaps cold air induction. The detailed instructions and all necessary parts make it easy for safe use, but it is essential that the ignition system, including advance mechanisms be working correctly.

Part #DescriptionApplicationPriceQty
Supercharger System
TR6 to 1971 US Spec Engines to (e) CC75000
Will fit RHD conversions
Supercharger System
TR6 72-76 RHD & LHD
All European spec models
Can be used on cars corverted to RHD
Suitable for PI specification engines
Big Boost Kit for Supercharger System
1969-1971 £67.50
Big Boost Kit for Supercharger System
1972-1976 £79.14