Nitrous Tune ??
I am running a cam and nitrous now and I am about to add heads so I will need a new tune. Do I have to compromise my tune because I run nitrous. In other words, I think nitrous tunes are fairly conservative, so is my NA tune not maxed to its full potential in order to be safe for nitrous ? I hope this makes sense
Your post and question made perfect sense.
And to answer your question, there is much more to a tune than just spark advance(timing). But your essentially right, you will have to pull timing compromising your N/A tune.
To get around this, you can get a timing tuner from places like harrisspeedworks that only pull timing when your on the juice. This would let you get the best from your n/a tune and your n20 tune.
My humble opinion from the dirty dirty
As Sobake said...the Timing Tuner will work. It pulls timing only when spraying. MSD now has the Timing Twister that essentially does the same.
Then...if you are getting retuned...talk to your tuner about fancy ways to get around this with a tune. There are ways to do that have been discussed here before. But the tuner really needs to have a grasp of the car and tuning capabilities.

