at the air filter like MAS. Not affected by bends in the pipe or obstruction that can affect velocity. Don't need a DoolZ to get accurate air flow measurement . All you measure is manifold pressure , temps, engine rpm calculate the engine VE delta to to arrive at your final VE.
You and I have have different philosophies on engine tuning. That is your opinion if you feel speed density is inferior. Don't act like your way is the only right way to tune or do things.