Oh don't get me wrong LocoSCZ I myself wouldn't mess with it either. Just trying to help BigT by stating some other mods, and how much it would cost to replace the Zetec if it barf'd up a valve after adding something like the VCT mod.
VCT is an on/off operation for the zetec. It's either off and at mechanical timing or retards when the computer turns it on, usually at traffic stop/idle so wouldn't really see any big gain like you said.
JD
