Originally Posted by stormcrow

Not true at all. Custom tunes, if done properly, are designed for the actual car and the actual conditions it is being run under. No canned tune, no matter how conservative, can come close to the safety factor of a solid custom tune. I don't know what tuners you use, but any that would put you on the ragged edge with a custom tune without being asked to do so is no tuner I want to have touch my car.