150+ is GOOD numbers. You should take pride in anything above 143. Like Silverado SS said it depends what you have and how your metered - windows up/down, mic position, car on/off, etc. Also extra battery, ho alt, how much power,space used for box, etc. You should pick a car class from a competition organization website that has equipment close to yours. Then see what type of numbers winners are doing and base your goals from that. Also remember that some the competitor's are using burb boxes that are awful for music listening but play certain tones extremely loud. So many variables.