I've got an '03 Cobra with a JLT CAI and Bassani Off-Road X-Pipe already installed. I'm eventually going to get a custom tune when I finally find the time to put on the ported supercharger and a bunch of other stuff that's been sitting in my garage for 6 months now. In the meantime, I was wondering in there was anything to be gained by messing around with the SCT X3 that I recently bought. It's the Model #3000 so it doesn't have any preloaded tunes in it. Can I adjust the spark and timing and get any more out of it or should I just leave it alone until I get the custom tune?
