Noise on take off
I have replaced the engine in my 2006 Mazdaspeed 6, on take off I hear a sound like when growing up we would clothes pin a piece of card board to the front fork of a bicycle to get engine sound. The speed increases with speed. After reaching a certain its not heard---probably covered by wind noise. The noise comes from the front of the somewhere around the engine. Does anyone have an idea what it is? Thanks.

