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.
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.
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??
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.![]()
www.RPMoutlet.comNEWBE17 said:Do you know where I can get like a kit with all the pulleys & belt?