If you want it to be dead on just buy an Adj. cam gear and play w/ it some.I'm going to have to say its half a tooth retarded. I got it as close as I can but the up position on the cam gear was not exactly at 12 oclock)more like 11:56) even when my crank is at tdc. Dont get me wrong the car runs great. I 'm just trying to squeeze every bit out it and if I'm losing power I'd like to get it back.