i'm no expert but from what i've read its not really worth it unless your going for 800+hp on fuel. but dont get me wrong a p-pumped 24v is pretty sick and i would do it but thats just me, another arguement ive seen is the fact the u can easly detune the VP cuz its elctronic and the p-pump is not that simple. i dont know what it takes exactly but thats what ive read.