Would an extra 2" of tread width help?

on marginal tracks, we usually lower tire pressures, lower launch rpm,. loosen up front shocks for better transfer of weight, this is on a 9 " tires, and clutch car. bias ply tires usually is 1/2 # radials is 1 # . wider tire will slow you down, i've seen two tenths difference by adding two inches tread width. just food for thought.