Here is my first dyno sheet.  The car made 416 rwhp/392 rwtq on that day.  It was my first dyno run after the car was put together with the Keith Craft shortblock, Edelbrock Performer heads, Vortech SQ-Trim, etc. I believe it had about 850 miles or so on the new combo.

This dyno sheet was taken about seven months later.  The only change between the first dyno sheet that this was was the addition of a Vortech Power Cooler.  The car had more miles here, so probably also broke in a little bit more.  The numbers were better, 435 rwhp/408 rwtq.

This dyno sheet showed the power difference after I swapped out a Ford GT40 intake for an Edelbrock Performer.  I found a gentleman on Mustangworld that wanted the cool-looking GT40, and I was hoping to add a few horsepower.  The improvement was much better than I expected, with improvements of about +28 rwhp and +26 rwtq.  I tried to keep the dyno runs as close as possible so that there wouldn't be too much of a difference due to weather.

Here is my best dyno sheet.  This was taken after the installation of an FTI cam.  Unfortunately, the T-Rex wasn't working that day, but it didn't seem to hurt power much.  The tuner tried to richen up the mixture, which threw the air/fuel WAAAAAAY off after I fixed the T-Rex.  Numbers were good, 500 rwhp/463 rwtq.  Numbers didn't drop off much at all with cats, and throughout most of the range they were actually better.  Peak hp and torque was 498 rwhp/468 rwtq.

Here is the most recent dyno sheet.  The temperature was a bit warmer than it was on the dyno sheet above, and I also had cats installed on the car full time at this point.  A retune was needed since the issue with the T-Rex above caused the air/fuel ratio to actually be richer than 10:1!!!  Power seemed to drop off a bit as we made runs, probably because the temperature outside was getting warmer, and the engine was getting heat soaked.  The tuner did allow it to cool down between runs, but I don't know how long cats hold the temperature in them.  Also interesting is that the tuner removed quite a bit of timing, and the numbers didn't really drop off much at all.  He tapered the peak timing down from 24 degrees to 18 degrees.  I was very suprised to see the horsepower and torque remain fairly constant.  He added about two degrees back on the final run, but later removed it because the numbers didn't change.  So, the bright side is that it is much safer now.  Either way, I was a bit disappointed to see the power drop off, but I may decide to try a different tuner down the road to see if he does anything differently.  Final numbers on this day were 485 rwhp\450 rwtq.

The original run is the first one, and the lower run is the last one.  It may be hard to see the colors on the dyno sheet, but the 485/450 run is actually the one that starts out higher, and doesn't go lower than the first run until after about 5700 rpm.