Zetec Crank Pulley Diameter

CVH and Zetec tuning, suspension and braking mods.
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Zetec Crank Pulley Diameter

Postby StreetDragster on Wed Sep 21, 2005 5:24 pm

Anyone know the diameter of the pulley on the Zetec's crank (Zetec-R if it makes any difference)???
Not the pulley for the cambelt, the pulley for the ancillaries (alternator, water pump, power steering etc)??

Or has someone got one off the engine, or the engine out the car which they could quickly measure for me???? (In millimetres if possible)

Thanks

Matt
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Postby StreetDragster on Wed Sep 21, 2005 7:11 pm

Doesn't matter, found the diameter, 132mm. So-

Crank Pulley - 132mm Diameter
Supercharger Pulley- 80mm Diameter

Ratio of charger to crank = 132/80 = 1.65
Therefore ratio of charger to crank pulley is 1:1.65, for every revolution of the crank the charger spins 1.65 times.

So assuming rev limit of 8000rpm
At rev limit the charger will be at 8000x1.65= 13,200rpm

Agree/disagree?

Thanks

Matt
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Postby heeman10 on Thu Sep 22, 2005 12:11 am

Correctamundo :)
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