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[Verbaliser]

Has anyone used a larger diameter supercharger pulley? Stock eaton M45 from a new cooper s has a 65.5mm pulley, which with a 110mm crank pulley gives a drive ratio of 1.68.

I'm trying to get down to something like a 1:1 to bring the boost right down.

Does anyone know if you can use eaton M62 or M90 pulleys on the M45 as these are generally larger. May be able to get hold of a pulley off an old mercedes or something?

Thanks