Underdrive Crank Pulley.

[Slo5Oh89]

I have had a underdrive pulley kit before and was not pleased with with alt and water pump pulleys. I am looking to put on just the Crank pulley the one I found is 52% underdrive crank pulley, would that still slow the accessorys down to or would I not notice it to much due to the stock pulleys? This car is not a daily driver either. '89 5-speed lx convrt.

 

[Gearbanger 101]

It will slow all the pulleys down 52%....which seems pretty considerably to me? Most pulley kits I've seen slow them down about half that amount? In any case, you can still source a smaller alternator pulley to speed it up and bring charging levels close to normal again. Unless you're experiencing overheating issues, I wouldn't really worry much about swapping out the waterpump pulley.

 

[lancec2c30]

Are you sure you didn't mean 25%?

 

[Mustang5L5]

Run the U/D crank pulley, and then install an overdrive alt pulley and 1993 cobra water pump pulley.

 

[Gearbanger 101]

Run the U/D crank pulley, and then install an overdrive alt pulley and 1993 cobra water pump pulley.

Is it a smaller diameter than the stock waterpump pulley? I wasn't aware.

 

[Mustang5L5]

Yes, it's smaller

1993 Cobra Water Pump Pulleys From PPI! - Ford Mustang Forums

 

[faststang90]

on my last street car i ran the race crank pulley,cobra wp pulley, and alt off a new car no problem. i want to say the stock alt is 85 volt and tyhe other was 130. u can see the size of it.

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