I've been researching stacking a Smarty with my Drag Comp but there seems to be several different opinions on HP#'s when stacking them. Here's a few questions I have:

1. Is the Smarty/TST really that much better than the Smarty/Drag Comp? Does anyone have any numbers?

2. Who has tested their truck with Drag Comp Vs. Smarty/Drag Comp on the Dyno? Some say I will lose HP when stacked and some say I will gain HP?

3. If I did stack Smarty/Drag Comp is it really better to run 5X4 on the Comp?

4. With my Drag Comp alone, what's better? 5X4 or 5X5? Why?

Thanks