4A-GZE MK1 Engine Oversized supercharger pulley question [Archive] - Toyota MR2 Message Board

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I found an oversized crank pulley for my rig, here: http://www.fensport.co.uk/Parts/Model_85/Category_1/ Scroll down the page a little bit to find the oversized crank pulley. I know from what it says that i also need the undersized idler pulley and larger belt. no prob. so my question first is do i need to upgrade the waterpump pulley as well? I noticed they have an oversized waterpump pulley just below in the parts list. Does anyone know if i need that or will it benefit me to buy it as