1' spacer under carb

Just about every dyno pull you see on you tube, that dynos without . Then with ,seem to always pickup in dyno numbers . Seems to me when you start getting into the spacers thicker than 1 inch things start varying a lot !! I’ve never had my race car on a dyno before! I always used the race track for that ! Every engine I have ever had always pickup ET and MPH with some sort of spacers underneath the carb or carbs !