Originally Posted by 2010 ram
I have the Poweraid tbs and didnt really noticed any mpg change or much or a power change.
That's because a throttlebody spacer was intended for use on non-efi engines where you want to increase the cyclonic movement of the air which results in more air/fuel mix time before it enters the cylinders. If you spin the air after the throttlebody, all you're doing is slowing it down fractionally. Look at how our intake runners are positioned, the air gets forces down to the bottom of the manifold, then up and around, through each runner, do you honestly thing that there's any change to the airflow characteristics by helically accelerating the air? If we had a ram-style or a single plane manifold, then absolutely, they'd have a use, but on our keg-style, they are a $100 way to make it sound like you have a small supercharger.