By going to an underdriven pulley, u are allowing the engine to spin easier because it has to spin the acessories (alternator, water pump) less thust adding power and better mpg.
This pulley buisness..
So im pretty new about mechanical stuff in cars, let me give you an idea. Most work i have ever done is things like oil changing, brakes (pads), and i changed my water pumped out once. So as you can tell im not a very skilled mechanic but youve gotta start somewhere. Can anyone explain this pulley stuff and how it actually adds power??? Im still trying to figure it out.
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yeah, all your accessories take hp to turn. the most power intensive are the waterpump, AC, and power steering.greenfieldracin said:By going to an underdriven pulley, u are allowing the engine to spin easier because it has to spin the acessories (alternator, water pump) less thust adding power and better mpg.
the accessory drives were made for ALL vehicles ford produces, including minivans which take a LOT more AC power to cool, more weight over the front wheels, making more steering boost necessary, etc.
Switching to an underdriver slows down all the accessories, freeing up the hp, lengthening the life of the accessories, and giving you a boost in mpg, as well.
So the #1 benifet is mpg boost but does it really add that much more power?? Is this power you can feel in the pedal??
you will feel it most at higher rpms, as that's when the accessories really start to drain power.99'StangTx said:So the #1 benifet is mpg boost but does it really add that much more power?? Is this power you can feel in the pedal??
it won't take NEARLY as long to hit redline. You'll find passing at highway speeds much easier, etc., If you have a manual, you'll feel it more than in an automatic.
would the 42% underdrive pulleys be ok on my car? I have two 12" subs/ 1000watt amp and sony 220watt speakers/kenwood deck. 
your car's max underdriver is 25%, I think for the pre-1999s. If you go with the 25% pulleys, you should go with an overdrive for your alternator.NEWBE17 said:would the 42% underdrive pulleys be ok on my car? I have two 12" subs/ 1000watt amp and sony 220watt speakers/kenwood deck.
Do you know where I can get like a kit with all the pulleys & belt?
www.RPMoutlet.comNEWBE17 said:Do you know where I can get like a kit with all the pulleys & belt?
www.RPM-mustangs.com
www.GTRhipo.com
www.extremev6racing.com
Mac & ASP for direct prices, which may or may not be better than the above . . .
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