So I just picked up a 07 raptor SE the other day, it has a k&n filter on it and has a hole in the top of the lid with a screen over it as well as some ebay genesis "chip". I have been looking around to see what people are saying regarding fuel controllers and have read that the hmf optimizer (dobeck style?) is not a great system. I am thinking about finding a stock lid and leaving it alone for the time being and maybe someday upgrade the exhaust and do a fuel controller then (power commander seems to be a popular choice). So the thing I was trying to find out was regarding target a/f ratios. I can't seem to find anything concrete so I thought I would post the question. I did read sometime over the past few days that 13.2: a/f would be good but would like some more insight. I have an aem wideband for my car which is having a new turbo downpipe made so the wideband is out of the car at the moment and was debating on setting it up on the raptor to see where I am at. If I can't do that I may throw the wheeler on the truck when I take the car to get it tuned and get the wideband setup on it then. Anyways, if anyone could add some insight I would appreciate it.