once i install it, will the car have to adjust to the changes in fuel mapping and stuff? or will it automatically be faster as soon as i crank the engine?

 

??????

 

Dude! Search, read, learn

There are more detailed, precise and probably accurate answers in many threads but you have to determine what 'maps' you want in the interceptor either by paying an experienced tuner to do it for you (based on your question, probably a really good idea) or doing the tuning yourself, probably a really bad idea

 

afaik, stock Interceptor-X comes with better-than-stock maps, so yes, it will be faster, but you can get a better tune (where better means safer & faster) by tuning to your car.

 

You should be posting this in the Mazsport section. But the quick answer is that as soon as you install it, your car does no more "adjusting". It just does whatever the Int-X tells it to do.