[mizhele]

hello anyone using the single groove crank pully that M.S.A. sells...im interested in one or off another z because i dont have ac/smog pump, and the crank pully ive got on now the two pieces have a very worn seal ring inbetween the two pieces that fit together...dont know if that would hurt anything??thankyou michele

 

[JJs72]

You can use either the single (euro) or the standard 2 groove pulley (unless you have radiator clearance problems). The weight difference is not noticeable in matters of speed and hp (yes, you do gain a few hp but can you really feel it). If you mean the worn rubber in the center that holds together the 2 pieces of the pulley, then stop whatever you're doing and replace that unit. When it goes, so goes everything else and a tow truck will be in your future. I have had both the euro and the 2 groove in my car. Go with a new one of either style.