my previous car (2000 dodge neon) i installed an underdrive pulley.
it is interesting how AEM
clouds this by calling it a "tru-power pulley" when it is just an oversized pulley that requires less turning torque and adds less power to the alternator hence less recharge to the battery.
i wish i had never done it to my old car. coming to stop lights my headlights would dim unless i revved the engine. my amp, even with a capacitor, drained the battery excessively 'causing the radio to shut off in mid cd. it always felt like my car was dancing near stalling. air conditioning and fan operations were weak. dashboard lighting was dim. everything related to the electrical and was of course "underdriven."
so, that is my experience with that performance upgrade. however that is also with a different car.
i also would like to hear what other celica gts owners experiences are with the AEM
tru-power pulley system...
what percent is it underdriving the celica gts? anyone know?