hey guys when i take off from a light not a launch but agrisive half way thru 1st the car will backfire 2-3 in a row not every time maybe 1/3 of the time i do havea custom dynoflash and staight 3'' tb exh i was just wondering thanks

 

Sounds like misfire from a bad spark plug. Also check your dynoflash, could be in the tuning.