Was the 1st one a 98?
Remember that the 98 GTs are 225 hp compared to the 210-215 horses of the 96-97 GTs...
Not much of a difference, but a difference none the less...
My GT ran a 15.3-15.5 bone stock at the track (first time) when I had absolutely NO idea how to launch, so that fits about right with your GTech...
That's the only thing I can think of...
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"The Yellowjacket"
1998 Mustang GT
13.97@103
"Traction Impaired" or "Nitto Needy"
"They think they can make fuel from horse manure.... Now, I don't know if your car will be able to get 30 miles to the gallon, but it's sure gonna put a stop to siphoning."
- Billie Holliday