I see a lot of names thrown around these days for "tuners"... HemiFever, Jay Greene, and lots of different shops offer their "talents". I don't know who really knows W T H they're doing... With these guys, I don't know how much is science and how much is "What happens if I push THIS button?"

I've been told a good "tune" for a Scat Pack is worth what was mentioned above, about 20 HP. And, no, it's not cheap when you need to drop the $ for a hand-held device, etc. Getting one w/ a safe "canned" tune that may be better than OEM but still leave power on the table is about $600 last I looked (e.g. DiabloSport). Add to that either the time and $ to have the original PCM unlocked or the cost to purchase an unlocked PCM outright and it's gonna hit $1K +/- ... ouch.

For me, I was looking for a couple of tenths so I could be pretty confident the car would run 11.99 or better under typical conditions. One of the local street car series has a 12.0 break between classes, which means you can flip a coin on whether I'm slower or faster depending on the time of year, etc.