^ For that reason.
To the OP, bono. Cam timing is a great tweak for any engine in my world. I put adjustable pulleys on them all.
Find a decent tuner that will walk you through what he's doing. Any reputable tuner will ask you your objective for the tuneup. i.e. max dyno horsepower or maybe a little short of that with a more driveable personality or profile - perhaps a bit better fuel efficiency. Then, he/she should explain the process to you as it's being done - the settings, results, etc.
I would run from any "Tuner" that doesn't involve you in the process and won't let you watch the work being performed.
As an example, for some of the tweaking I do on NA SOHC & DOHC engines of a daily driver. For SOHC I usually advance the cam ~2 degrees for better low end torque, the trade off is a bit less peak horsepower at the top end. For the NA DOHC I run the exhaust cam on time and advance the intake 1 or 2 degrees of cam timing or 2-4 degrees relative to the crankshaft. Same reason, more bottom end torque and more driveable.
For maximum performance, that is not the setup - a max performance setup would be more on time or even retarded a bit.
We advised you to solicit help because it's a more advanced adjustment and could result in some catastrophic events if done incorrectly. After you watch it being done, and familiarize yourself with the "Cause and Effect" aspects, then with a bit of research, you should be able to do cam timing adjustments yourself in the future.
