The converter would help, but that's not what made you lose the race. He jumped you right from the dig. The saying goes as follows, " If you follow, you swallow ". If you reacted first, regardless of your lag, the race would have been the same with you being ahead a car with nothing else changed. 18 psi on street tires in 90 degree heat also didn't help either. If you want to really smash him, just add the alky kit on it and crank the boost to 22 to 24 psi...... game over