fuel vent size

Yea ive checked the float levels, and my rev limiter, I put a higher chip in but didnt have an effect, even unplugged it no change........I have another fitting coming any day, going to increase the vent hose and fitting to 8AN/ 1/2" to match the fuel delivery size. It just makes sense if you are exiting a certain volume of fuel to have the same volume air coming in?
I did notice my current 3/8" vent hose had a kink in it, had to bend a 90*, Ill make it more of a slow sweep...........thanks