T
N U F E C I I T N R I O M V A H T TWIN WI
hey say the best things in life are worth waiting for! That is the case for the TVS 900 supercharger using Eaton’s Twin Vortices technology. Australian company Harrop Engineering brought their TVS 900 kit out in the second half of 2017. It was designed and manufactured by Harrop to OE standards as a direct replacement for the Eaton M45 Supercharger installed as standard in the R53 Mini Cooper S. The Harrop TVS900 utilises the latest generation Eaton TVS supercharger technology including four lobe rotors (160 degree helix) and revised inlet and outlet port geometry to achieve greater thermal and volumetric efficiency. Although designed as a direct replacement there is 28
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a performance advantage as the TVS supercharger is larger. The original M45 is 45 cubic inches or 737.4cc, the TVS is 900cc or 54.9 cubic inches. With a standard Harrop 70mm pulley the TVS will work well on standard motor with an OEM DME. Reduced diameter pulleys or modified engines will require a tune and maybe larger injectors dependant on the motor spec.
