Xcal3?

[Power Hungry]

Yes, when testing vehicles we pushed them to the ragged edge (no pun intended). We know where power can still be made with both aggressive timing and fuel modifications and we always back down a bit to leave room for error.

Many things can affect performance including temperature, humidity, fuel quality, fuel octane, ethanol content, and others... and that's not even getting into the bolt-on stuff.

It has been my experience that SCT and Superchips tend to run a bit more aggressive on their canned tuning, which I believe stems from their desire to have good marketing HP numbers. This means that there is less tolerance for environmental changes or mechanical modifications.

Hope this helps.