Something definately wrong with your car or install! I ran a 12.70 with just a needswings cai. However no loud whine, the car is just not built like a supercharged mustang. It is designed to be somewhat discreet. I did get a few people who said they could hear the sc whine from outside the car. I consider this my best single mod to date! listen to this http://www.youtube.com/v/VZRtsbOkqOU