If you search that info here you will get mixed opinion/results,, i have both and without any change to my tune the v/booster fattened my Wband # from 10.7 to 10.5 on a full pull, which i was ok with as i keep in near 30Lbs. And that is all i saw. I'm sure if your racing and chasing an ET slip,,it could be an issue and need to adj the tune.