One of the most commonly questions that I get is "What calibration should I start out with?".
The answer to this question is actually fairly simple. Go to the Calibrations page on this site and use the filter based on your mods. Quite frequently you are not able to find a base calibration that exactly matches your mod list. No worries, the priority of mods for picking a calibration is this:
Forced Induction (S/C, Turbo), or Naturally Aspirated (N/A), then
So if you don't find a calibration that matches your mods completely, you can go by that rule of thumb. If you have more exotic mods such as cams, superchargers, turbos and cannot find a base calibration, look into getting a professional eTune or a dyno tune from a respected K series tuner in your area. A professional tune isn't just limited to more exotic modifications. Once you've picked out your base calibration, you will want to fine tune it for your car and if you are unsure of what changes you need to make yourself, a professional tune is a great choice for your next mod.
I try to upload base calibrations for the most popular mod combinations that I see in the 8th community, but I can't cover everything as it seems to be an almost infinite array of combinations.