hey turbobob ive read alot of threads and you seem to be the go to guy for the maft translator. so my question for you is i got my maft setup gm 3.0 15g's 550's injectors. the purple wire i understand is the piggy back and the white wire is the tach wire. my vr4 when i purchased it already had a safc version 1 in it so do i really need to hook up the tach wire. like i would gain from using it. or it doesnt matter.