Originally Posted by rogan01
Thanks but what exactly is it? Is it basically a rough idle? Is there a chance of stalling if idle drops too much?
The 5.0L engine in the 11+ Mustangs uses a newer technology called Ti-VCT Twin Independent Variable Cam Timing.
Here's an interesting article on the inner workings of the newer 3.7 & 5.0 engines
What the track key does (as well as aftermarket tuners) is reprogram the PCM for more spirited driving, different, more aggressive shift points, etc.
Unique to the Ti-VCT technology, tuners are able to overlap the timing on the oem cams, thus producing the "lope" that you hear in the previous video. Older 4v and 3v engines are forced to replace the cams to produce the same effect, since the cams are dependent on working together.
There is no real gain from the overlap (also called a ghost cam) on the 11+ it's all for the "cool factor". Whereas replacing the cams on the older engines will produce HP gains.
Ford Racing does sell the BOSS 302 Intake and Exhaust cams which will give you a slight bump in power...but why spend the $1000 for them when you can have the same sound for $250 =)