Back on May 5th I brought my car down to Matt & Bobby at Jailbreak Tuning to do some software tuning on the dyno. Previously my car had the Dinan stage two software (along with their intake, exhaust and 3.45 rear differential, all of which it still has). Check out the video:
The first three runs we did were with the Dinan software still intact, to get a baseline. Run three was the strongest of them, with peak horsepower at 327.46 and peak torque at 314.79. (note: these are all SAE corrected numbers) Matt pointed out to me how rich the mixture was above 5250rpm and how "wavy" the lines are, which Matt says is indicative of the knock sensor kicking in all the time. Luckily these are both things that can be fixed with software to produce more power. Then Matt downloaded the Jailbreak software to my ECU and we did some more runs. The horsepower and torque curves immediately jumped up, and the A/F ratio stayed much closer to 13.0. So already a great improvement. But Matt saw some things that could be improved upon - a small change in fueling here, a timing adjustment there, etc. We did a run or two with the MAFs disconnected - made virtually no difference at all. After eleven runs in total we were done.
Peak horsepower: 327.46 to 342.82
Horsepower @ 6000rpm: 311.06 to 333.11
Peak torque: 314.79 to 330.63
Torque @ 4500rpm: 311.55 to 330.59
Again, all numbers are SAE corrected. Oh, this was with 91 octane (CA) pump gas, by the way. Don't be overly concerned with the absolute numbers - it's more about the differential, as the car wasn't moved from the time the Dinan stage 2 was on there until the Jailbreak tune, using the same dyno on the same day, same outside temperature, etc. It was around 75 degrees F, by the way. Also, the car's air conditioning was on, which could account for a little bit of power loss.
You can see the "waviness" in the run 3 curves, and how much flatter the curves got with the changes (run 11). The air/fuel ratio improvements are also very visible. Just look at that flat torque curve!
Now that I've had this tune in place for a few weeks I can give some overall impressions. The car is just as driveable as before, but it seems more "eager". Just a bit more juice. The idle is smooth. No CES light or codes. And sport mode stays on! I'm a fan.
Matt & Bobby are super nice guys that know what they're doing. I'd definitely recommend their products. Here's their site: Jailbreak Tuning
If you're in southern California they may be able to do custom tuning on the dyno for your car like they did for mine, so definitely ask them.
I hope this has been helpful!