Gen 3 Underdrive Pulleys

I know this has been said before, but, "Get a VAK!" Much easier than UDPs, all the gains, none of the losses. If you do that and it's still not enough, then contact a shop about getting a custom set of UDPs. AFAIK, there are no UDPs mass-produced for the Taurus Vulcan.

Just curious why couldnt we use the underdrive pully from a ford ranger vulcan engine?

a vac does not have all the gains...good substitute but not the same. A vak only disengages the alternator, the a/c takes care of itself, and if you have a sho it lessens the power steering a little, not fully by any means. An underdrive pully on the crank will lessen the parasitic losses of the waterpump...well everything about 20-30% depending on the pully size. Some say there are downsides to a UDP but there are also damaging aspects to a VAK.

If you had the money, both would be the best thing. That way you recover HP from the UDP and also temporarly save on the alternator load for a few seconds during WOT.

Brad

I've been here awhile but I STILL don't know what a VAK is. I've tried for the life of me to figure it out but this is one of those things that my brain just farts out on.

Originally posted by pumaboyairn@May 17 2004, 02:03 AM
I've been here awhile but I STILL don't know what a VAK is. I've tried for the life of me to figure it out but this is one of those things that my brain just farts out on.

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Send a PM to SHOZ123. He makes and sells them.

And btw, I have 97 duratec and my VAK partially cuts out my power steering, so it's not just for the SHO's.