the question is more like

do you want bump, or do you want go?

because, i could give you a lot of performance idea's, but the fact of having a sound system in a car (aka a good one) will use up a lot of battery and a lot of juice the car otherwise wants. There is no half/half for power or sound when it comes to a pulley[&:]

 

i heard you could get a capacitor and you would be ok not sure if that is the case